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Saleh M, Virarkar M, Javadi S, Mathew M, Vulasala SSR, Son JB, Sun J, Bayram E, Wang X, Ma J, Szklaruk J, Bhosale P. A Feasibility Study on Deep Learning Reconstruction to Improve Image Quality With PROPELLER Acquisition in the Setting of T2-Weighted Gynecologic Pelvic Magnetic Resonance Imaging. J Comput Assist Tomogr 2023; 47:721-728. [PMID: 37707401 DOI: 10.1097/rct.0000000000001491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVES Evaluate deep learning (DL) to improve the image quality of the PROPELLER (Periodically Rotated Overlapping Parallel Lines with Enhanced Reconstruction technique) for 3 T magnetic resonance imaging of the female pelvis. METHODS Three radiologists prospectively and independently compared non-DL and DL PROPELLER sequences from 20 patients with a history of gynecologic malignancy. Sequences with different noise reduction factors (DL 25%, DL 50%, and DL 75%) were blindly reviewed and scored based on artifacts, noise, relative sharpness, and overall image quality. The generalized estimating equation method was used to assess the effect of methods on the Likert scales. Quantitatively, the contrast-to-noise ratio and signal-to-noise ratio (SNR) of the iliac muscle were calculated, and pairwise comparisons were performed based on a linear mixed model. P values were adjusted using the Dunnett method. Interobserver agreement was assessed using the κ statistic. P value was considered statistically significant at less than 0.05. RESULTS Qualitatively, DL 50 and DL 75 were ranked as the best sequences in 86% of cases. Images generated by the DL method were significantly better than non-DL images ( P < 0.0001). Iliacus muscle SNR on DL 50 and DL 75 was significantly better than non-DL images ( P < 0.0001). There was no difference in contrast-to-noise ratio between the DL and non-DL techniques in the iliac muscle. There was a high percent agreement (97.1%) in terms of DL sequences' superior image quality (97.1%) and sharpness (100%) relative to non-DL images. CONCLUSION The utilization of DL reconstruction improves the image quality of PROPELLER sequences with improved SNR quantitatively.
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Affiliation(s)
- Mohammed Saleh
- From the Department of Internal Medicine, University of Texas health Science Center at Houston, Houston, TX
| | - Mayur Virarkar
- Department of Diagnostic Radiology, University of Florida College of Medicine, Jacksonville, FL
| | - Sanaz Javadi
- Department of Abdominal Imaging, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Manoj Mathew
- Department of Radiology, Stanford University, Stanford, CA
| | | | | | - Jia Sun
- Biostatistics, University of Texas MD Anderson Cancer Center
| | - Ersin Bayram
- Global MR Applications and Workflow, GE Healthcare, Houston, TX
| | - Xinzeng Wang
- Global MR Applications and Workflow, GE Healthcare, Houston, TX
| | | | - Janio Szklaruk
- Department of Diagnostic Radiology, University of Florida College of Medicine, Jacksonville, FL
| | - Priya Bhosale
- Department of Diagnostic Radiology, University of Florida College of Medicine, Jacksonville, FL
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Ranasinghe WKB, Troncoso P, Surasi DS, Ibarra Rovira JJ, Bhosale P, Szklaruk J, Kokorovic A, Wang X, Elsheshtawi M, Zhang M, Aparicio A, Chapin BF, Bathala TK. Defining Diagnostic Criteria for Prostatic Ductal Adenocarcinoma at Multiparametric MRI. Radiology 2022; 303:110-118. [PMID: 35076303 DOI: 10.1148/radiol.204732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Background Prostatic ductal adenocarcinoma (DAC) is an aggressive histologic variant of prostate cancer that often warrants multimodal therapy and poses a significant diagnostic challenge clinically and at imaging. Purpose To develop multiparametric MRI criteria to define DAC and to assess their diagnostic performance in differentiating DAC from prostatic acinar adenocarcinoma (PAC). Materials and Methods Men with histologically proven DAC who had multiparametric MRI before radical prostatectomy were retrospectively identified from January 2011 through November 2018. MRI features were predefined using a subset of nine DACs and then compared for men with peripheral-zone DACs 1 cm or greater in size and men with matched biopsy-confirmed International Society of Urological Pathology grade group 4-5 PAC, by four independent radiologists blinded to the pathologic diagnosis. Diagnostic performance was determined by consensus read. Patient and tumor characteristics were compared by using the Fisher test, t-tests, and Mann-Whitney U test. Agreement (Cohen κ) and sensitivity analyses were also performed. Results There were 59 men with DAC (median age, 63 years [interquartile range, 56, 67 years]) and 59 men with PAC (median age, 64 years [interquartile range, 59, 69 years]). Predefined MRI features, including intermediate T2 signal, well-defined margin, lobulation, and hypointense rim, were detected in a higher proportion of DACs than PACs (76% [45 of 59] vs 5% [three of 59]; P < .001). On consensus reading, the presence of three or more features demonstrated 76% sensitivity, 94% specificity, 94% positive predictive value [PPV], and 80% negative predictive value [NPV] for all DACs and 100% sensitivity, 95% specificity, 81% PPV, and 100% NPV for pure DACs. The DACs and PACs showed no difference in contrast enhancement (100% vs 100%; P >.99, median T2 signal intensity (254 vs 230; P = .99), or apparent diffusion coefficient (median, 677 10-6 mm2/sec vs 685 10-6 mm2/sec; P = .73). Conclusion The presence of intermediate T2 signal, well-defined margin, lobulation, and/or hypointense rim, together with restricted diffusion and contrast enhancement at multiparametric MRI of the prostate, suggests prostatic ductal adenocarcinoma rather than prostatic acinar adenocarcinoma. © RSNA, 2022 Online supplemental material is available for this article.
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Affiliation(s)
- Weranja K B Ranasinghe
- From the Department of Urology (W.K.B.R., A.K., M.E., B.F.C.), Department of Pathology (P.T., M.Z.), Division of Diagnostic Imaging (D.S.S., J.J.I.R., P.B., J.S., T.K.B.), Department of Biostatistics (X.W.), and Department of Medical Oncology (A.A.), University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1373, Houston, TX 77030
| | - Patricia Troncoso
- From the Department of Urology (W.K.B.R., A.K., M.E., B.F.C.), Department of Pathology (P.T., M.Z.), Division of Diagnostic Imaging (D.S.S., J.J.I.R., P.B., J.S., T.K.B.), Department of Biostatistics (X.W.), and Department of Medical Oncology (A.A.), University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1373, Houston, TX 77030
| | - Devaki Shilpa Surasi
- From the Department of Urology (W.K.B.R., A.K., M.E., B.F.C.), Department of Pathology (P.T., M.Z.), Division of Diagnostic Imaging (D.S.S., J.J.I.R., P.B., J.S., T.K.B.), Department of Biostatistics (X.W.), and Department of Medical Oncology (A.A.), University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1373, Houston, TX 77030
| | - Juan José Ibarra Rovira
- From the Department of Urology (W.K.B.R., A.K., M.E., B.F.C.), Department of Pathology (P.T., M.Z.), Division of Diagnostic Imaging (D.S.S., J.J.I.R., P.B., J.S., T.K.B.), Department of Biostatistics (X.W.), and Department of Medical Oncology (A.A.), University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1373, Houston, TX 77030
| | - Priya Bhosale
- From the Department of Urology (W.K.B.R., A.K., M.E., B.F.C.), Department of Pathology (P.T., M.Z.), Division of Diagnostic Imaging (D.S.S., J.J.I.R., P.B., J.S., T.K.B.), Department of Biostatistics (X.W.), and Department of Medical Oncology (A.A.), University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1373, Houston, TX 77030
| | - Janio Szklaruk
- From the Department of Urology (W.K.B.R., A.K., M.E., B.F.C.), Department of Pathology (P.T., M.Z.), Division of Diagnostic Imaging (D.S.S., J.J.I.R., P.B., J.S., T.K.B.), Department of Biostatistics (X.W.), and Department of Medical Oncology (A.A.), University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1373, Houston, TX 77030
| | - Andrea Kokorovic
- From the Department of Urology (W.K.B.R., A.K., M.E., B.F.C.), Department of Pathology (P.T., M.Z.), Division of Diagnostic Imaging (D.S.S., J.J.I.R., P.B., J.S., T.K.B.), Department of Biostatistics (X.W.), and Department of Medical Oncology (A.A.), University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1373, Houston, TX 77030
| | - Xuemei Wang
- From the Department of Urology (W.K.B.R., A.K., M.E., B.F.C.), Department of Pathology (P.T., M.Z.), Division of Diagnostic Imaging (D.S.S., J.J.I.R., P.B., J.S., T.K.B.), Department of Biostatistics (X.W.), and Department of Medical Oncology (A.A.), University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1373, Houston, TX 77030
| | - Mohamed Elsheshtawi
- From the Department of Urology (W.K.B.R., A.K., M.E., B.F.C.), Department of Pathology (P.T., M.Z.), Division of Diagnostic Imaging (D.S.S., J.J.I.R., P.B., J.S., T.K.B.), Department of Biostatistics (X.W.), and Department of Medical Oncology (A.A.), University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1373, Houston, TX 77030
| | - Miao Zhang
- From the Department of Urology (W.K.B.R., A.K., M.E., B.F.C.), Department of Pathology (P.T., M.Z.), Division of Diagnostic Imaging (D.S.S., J.J.I.R., P.B., J.S., T.K.B.), Department of Biostatistics (X.W.), and Department of Medical Oncology (A.A.), University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1373, Houston, TX 77030
| | - Ana Aparicio
- From the Department of Urology (W.K.B.R., A.K., M.E., B.F.C.), Department of Pathology (P.T., M.Z.), Division of Diagnostic Imaging (D.S.S., J.J.I.R., P.B., J.S., T.K.B.), Department of Biostatistics (X.W.), and Department of Medical Oncology (A.A.), University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1373, Houston, TX 77030
| | - Brian F Chapin
- From the Department of Urology (W.K.B.R., A.K., M.E., B.F.C.), Department of Pathology (P.T., M.Z.), Division of Diagnostic Imaging (D.S.S., J.J.I.R., P.B., J.S., T.K.B.), Department of Biostatistics (X.W.), and Department of Medical Oncology (A.A.), University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1373, Houston, TX 77030
| | - Tharakeswara K Bathala
- From the Department of Urology (W.K.B.R., A.K., M.E., B.F.C.), Department of Pathology (P.T., M.Z.), Division of Diagnostic Imaging (D.S.S., J.J.I.R., P.B., J.S., T.K.B.), Department of Biostatistics (X.W.), and Department of Medical Oncology (A.A.), University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1373, Houston, TX 77030
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Morshid A, Szklaruk J, Yacoub JH, Elsayes KM. Errors and Misinterpretations in Imaging of Chronic Liver Diseases. Magn Reson Imaging Clin N Am 2021; 29:419-436. [PMID: 34243927 DOI: 10.1016/j.mric.2021.05.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
MRI is an important problem-solving tool for accurate characterization of liver lesions. Chronic liver disease alters the typical imaging characteristics and complicates liver imaging. Awareness of imaging pitfalls and technical artifacts and ways to mitigate them allows for more accurate and timely diagnosis.
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Affiliation(s)
- Ali Morshid
- Department of Diagnostic Radiology, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555, USA.
| | - Janio Szklaruk
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, 1400 Pressler Street, Houston, TX 77030, USA
| | - Joseph H Yacoub
- Department of Radiology, Medstar Georgetown University Hospital, 110 Irving Street Northwest, Washington, DC 20010, USA
| | - Khaled M Elsayes
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, 1400 Pressler Street, Houston, TX 77030, USA
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Wang X, Ma J, Bhosale P, Ibarra Rovira JJ, Qayyum A, Sun J, Bayram E, Szklaruk J. Novel deep learning-based noise reduction technique for prostate magnetic resonance imaging. Abdom Radiol (NY) 2021; 46:3378-3386. [PMID: 33580348 PMCID: PMC8215028 DOI: 10.1007/s00261-021-02964-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/17/2020] [Accepted: 01/16/2021] [Indexed: 02/07/2023]
Abstract
Introduction Magnetic resonance imaging (MRI) has played an increasingly major role in the evaluation of patients with prostate cancer, although prostate MRI presents several technical challenges. Newer techniques, such as deep learning (DL), have been applied to medical imaging, leading to improvements in image quality. Our goal is to evaluate the performance of a new deep learning-based reconstruction method, “DLR” in improving image quality and mitigating artifacts, which is now commercially available as AIRTM Recon DL (GE Healthcare, Waukesha, WI). We hypothesize that applying DLR to the T2WI images of the prostate provides improved image quality and reduced artifacts. Methods This study included 31 patients with a history of prostate cancer that had a multiparametric MRI of the prostate with an endorectal coil (ERC) at 1.5 T or 3.0 T. Four series of T2-weighted images were generated in total: one set with the ERC signal turned on (ERC) and another set with the ERC signal turned off (Non-ERC). Each of these sets then reconstructed using two different reconstruction methods: conventional reconstruction (Conv) and DL Recon (DLR): ERCDLR, ERCConv, Non-ERCDLR, and Non-ERCConv. Three radiologists independently reviewed and scored the four sets of images for (i) image quality, (ii) artifacts, and (iii) visualization of anatomical landmarks and tumor. Results The Non-ERCDLR scored as the best series for (i) overall image quality (p < 0.001), (ii) reduced artifacts (p < 0.001), and (iii) visualization of anatomical landmarks and tumor. Conclusion Prostate imaging without the use of an endorectal coil could benefit from deep learning reconstruction as demonstrated with T2-weighted imaging MRI evaluations of the prostate.
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Affiliation(s)
- Xinzeng Wang
- MR Clinical Solutions and Research Collaborations, GE Healthcare, Houston, TX, USA
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA, 1515 Holcombe Blvd., Houston, TX, USA
| | - Jingfei Ma
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA, 1515 Holcombe Blvd., Houston, TX, USA
| | - Priya Bhosale
- Department of Abdominal Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX, USA, 1515 Holcombe Blvd., Houston, TX, USA
| | - Juan J Ibarra Rovira
- Department of Abdominal Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX, USA, 1515 Holcombe Blvd., Houston, TX, USA
| | - Aliya Qayyum
- Department of Abdominal Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX, USA, 1515 Holcombe Blvd., Houston, TX, USA
| | - Jia Sun
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA, 1515 Holcombe Blvd., Houston, TX, USA
| | - Ersin Bayram
- MR Clinical Solutions and Research Collaborations, GE Healthcare, Houston, TX, USA
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA, 1515 Holcombe Blvd., Houston, TX, USA
| | - Janio Szklaruk
- Department of Abdominal Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX, USA, 1515 Holcombe Blvd., Houston, TX, USA.
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Abstract
Hepatic steatosis can lead to liver cancer, cirrhosis, and portal hypertension. There are two main types, non-alcoholic fatty liver disease (NAFLD) and alcoholic liver disease. The detection and quantification of hepatic steatosis with lifestyle changes can slow the evolution from NAFLD to steatohepatitis. Currently, the gold standard for the quantification of fat in the liver is biopsy, has some limitations. Hepatic steatosis is frequently detected during cross sectional imaging. Ultrasound (US), Computed Tomography (CT), and Magnetic Resonance Imaging (MRI) provide noninvasive assessment of liver parenchyma and can detect fat infiltration in the liver. However, the non-invasive quantification of hepatic steatosis by imaging has been challenging. Recent MRI techniques show great promise in the detection and quantification of liver fat. The aim of this article is to review the utilization of non-invasive imaging modalities for the detection and quantification of hepatic steatosis, to evaluate their advantages and limitations.
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Affiliation(s)
- Mayur Virarkar
- Department of Neuroradiology, The University of Texas Health Science Center, Houston, TX.
| | - Janio Szklaruk
- Department of Abdominal Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Corey T Jensen
- Department of Abdominal Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Melissa W Taggart
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Priya Bhosale
- Department of Abdominal Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX
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Abstract
A 60-year-old man with prostate adenocarcinoma status post radical prostatectomy and bilateral pelvic lymph node dissection referred for restaging F-fluciclovine PET/CT due to rising serum prostate-specific antigen levels (1.1 ng/mL at that time of imaging). PET/CT images were obtained from the proximal thighs to the vertex of the skull approximately 3 to 5 minutes after the IV administration of 347.8 MBq (9.4 mCi) of F-fluciclovine. PET/CT imaging demonstrated a focus of abnormally increased F-fluciclovine uptake at the right ureterovesical junction. Subsequent MRI of the pelvis revealed that this focus corresponded to a benign ureterocele.
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Affiliation(s)
- Ryan Bitar
- From the The University of Texas Health Science Center at San Antonio, San Antonio
| | - Janio Szklaruk
- Department of Nuclear Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Lucia Martiniova
- Department of Nuclear Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Amado J Zurita
- Department of Nuclear Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Lisly J Chery
- Department of Nuclear Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Gregory Ravizzini
- Department of Nuclear Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX
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Moawad AW, Elsayes KM, Benamar F, Rao K, Sun J, Szklaruk J. Value of Follow-Up Chest Computed Tomography in the Surveillance of Patients with Hepatocellular Carcinoma. J Hepatocell Carcinoma 2020; 7:331-335. [PMID: 33240826 PMCID: PMC7680686 DOI: 10.2147/jhc.s280175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 11/02/2020] [Indexed: 12/13/2022] Open
Abstract
Purpose To evaluate the value of follow-up chest CT in the surveillance of HCC patients. Background Imaging guidelines for the surveillance of hepatocellular carcinoma (HCC) patients recommend multiple follow-up computed tomography (CT) examinations of the chest, abdomen, and pelvis. Imaging studies are a major driver of rising healthcare costs. The appropriate use of imaging studies must be evaluated to provide valued health care. Methods We reviewed the radiology reports of baseline and follow-up chest, abdominal, and pelvic CT examinations of HCC patients. We categorized the incidence of malignancy in the chest and abdomen for the baseline and follow-up examinations. We also categorized the follow-up examinations as showing improved disease, stable disease, or disease progression. We correlated any progression of disease in the chest with progression of disease in the abdomen. We determined the extent to which disease progression in the chest occurred alongside that in the abdomen. Descriptive statistical analysis was carried out using R (version 3.5.2, R Development Core Team). Results Of the 226 patients included in our study, only 7 (3%) had disease progression in the chest without corresponding disease progression in the abdomen and pelvis on follow-up CT. Only 1.8% of patients with disease progression in the chest had a negative CT chest at baseline. Conclusion Follow-up chest CT has limited benefit in the surveillance of HCC patients, especially those with negative baseline chest CT findings.
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Affiliation(s)
- Ahmed W Moawad
- Department of Abdominal Imaging, Division of Diagnostic Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Khaled M Elsayes
- Department of Abdominal Imaging, Division of Diagnostic Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Farah Benamar
- Department of Abdominal Imaging, Division of Diagnostic Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Kundan Rao
- Department of Abdominal Imaging, Division of Diagnostic Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jia Sun
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Janio Szklaruk
- Department of Abdominal Imaging, Division of Diagnostic Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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Saleh M, Virarkar M, Bura V, Valenzuela R, Javadi S, Szklaruk J, Bhosale P. Intrahepatic cholangiocarcinoma: pathogenesis, current staging, and radiological findings. Abdom Radiol (NY) 2020; 45:3662-3680. [PMID: 32417933 DOI: 10.1007/s00261-020-02559-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
To this date, it is a major oncological challenge to optimally diagnose, stage, and manage intrahepatic cholangiocarcinoma (ICC). Imaging can not only diagnose and stage ICC, but it can also guide management. Hence, imaging is indispensable in the management of ICC. In this article, we review the pathology, epidemiology, genetics, clinical presentation, staging, pathology, radiology, and treatment of ICC.
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Slagowski JM, Ding Y, Aima M, Wen Z, Fuller CD, Chung C, Debnam JM, Hwang KP, Kadbi M, Szklaruk J, Wang J. A modular phantom and software to characterize 3D geometric distortion in MRI. Phys Med Biol 2020; 65:195008. [PMID: 32531763 PMCID: PMC7772054 DOI: 10.1088/1361-6560/ab9c64] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Magnetic resonance imaging (MRI) offers outstanding soft tissue contrast that may reduce uncertainties in target and organ-at-risk delineation and enable online adaptive image-guided treatment. Spatial distortions resulting from non-linearities in the gradient fields and non-uniformity in the main magnetic field must be accounted for across the imaging field-of-view to prevent systematic errors during treatment delivery. This work presents a modular phantom and software application to characterize geometric distortion (GD) within the large field-of-view MRI images required for radiation therapy simulation. The modular phantom is assembled from a series of rectangular foam blocks containing high-contrast fiducial markers in a known configuration. The modular phantom design facilitates transportation of the phantom between different MR scanners and MR-guided linear accelerators and allows the phantom to be adapted to fit different sized bores or coils. The phantom was evaluated using a 1.5 T MR-guided linear accelerator (MR-Linac) and 1.5 T and 3.0 T diagnostic scanners. Performance was assessed by varying acquisition parameters to induce image distortions in a known manner. Imaging was performed using T1 and T2 weighted pulse sequences with 2D and 3D distortion correction algorithms and the receiver bandwidth (BW) varied as 250-815 Hz pixel-1. Phantom set-up reproducibility was evaluated across independent set-ups. The software was validated by comparison with a non-modular phantom. Average geometric distortion was 0.94 ± 0.58 mm for the MR-Linac, 0.90 ± 0.53 mm for the 1.5 T scanner, and 1.15 ± 0.62 mm for the 3.0 T scanner, for a 400 mm diameter volume-of-interest. GD increased, as expected, with decreasing BW, and with the 2D versus 3D correction algorithm. Differences in GD attributed to phantom set-up were 0.13 mm or less. Differences in GD for the two software applications were less than 0.07 mm. A novel modular phantom was developed to evaluate distortions in MR images for radiation therapy applications.
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Affiliation(s)
- Jordan M Slagowski
- Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States of America
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Szklaruk J, Son JB, Starr BF, Sun J, Davila A, Bhosale PR, Ma J. Evaluation of feasibility and image quality of a new radial quantitative T2 weighted imaging sequence for liver MRI. Clin Imaging 2020; 66:77-81. [PMID: 32460150 DOI: 10.1016/j.clinimag.2020.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 04/14/2020] [Accepted: 05/13/2020] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To evaluate the clinical feasibility of a new T2 weighted sequence to calculate T2 relaxation times (T2RT) of liver lesions using two-dimensional radial turbo spin echo (2DRTSE) and to evaluate this sequence by performing image quality and relaxation time comparison of multiple liver lesions. MATERIALS AND METHODS This prospective analysis of 2DRTSE sequences (using 22 echoes) was performed in 19 patients with 36 liver lesions. Two radiologists independently obtained T2RTs for liver lesions and scored image quality and image artifacts. Lesions were classified as cyst, hemangioma, solid, or necrotic. T2RT values were compared. Inter-reader agreement was evaluated. RESULTS The 2DRTSE images were considered good quality with few artifacts by both radiologists. Nineteen patients were included in the study, with a total of 36 liver lesions. Two of the liver lesions were classified as cysts, 7 as hemangiomas, 4 as necrotic lesions, and 23 as solid lesions. The concordance correlation coefficient was 0.996 for the calculated T2RT of each liver lesion between the two readers, indicating good agreement. There was statically significant difference of the calculated T2RT for each lesion type. CONCLUSION The 2DRTSE sequence can be performed and provides good T2W image quality and a quantitative T2RT map of the entire abdomen. The liver lesions can be distinguished based on the calculated T2RT using this technique. 2DRTSE could potentially supplant the current T2-weighted imaging sequence with the benefit of quantitative T2RTs.
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Affiliation(s)
- Janio Szklaruk
- Department of Abdominal Imaging, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 1473, Houston, TX, USA.
| | - Jong Bum Son
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 1472, Houston, TX, USA.
| | - Bryce F Starr
- Department of Radiation Oncology, Duke University, 201 Science Drive, Durham, NC 27708, USA.
| | - Jia Sun
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 1411, Houston, TX, USA.
| | - Anthony Davila
- Department of Abdominal Imaging, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 1473, Houston, TX, USA.
| | - Priya R Bhosale
- Department of Abdominal Imaging, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 1473, Houston, TX, USA.
| | - Jingfei Ma
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 1472, Houston, TX, USA.
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Bathala TK, Venkatesan AM, Ma J, Bhosale P, Wei W, Kudchadker RJ, Wang J, Anscher MS, Tang C, Bruno TL, Frank SJ, Szklaruk J. Quality comparison between three-dimensional T2-weighted SPACE and two-dimensional T2-weighted turbo spin echo magnetic resonance images for the brachytherapy planning evaluation of prostate and periprostatic anatomy. Brachytherapy 2020; 19:484-490. [PMID: 32402544 DOI: 10.1016/j.brachy.2020.04.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/16/2020] [Accepted: 04/02/2020] [Indexed: 10/24/2022]
Abstract
PURPOSE The purpose of this study was to compare an isotropic three-dimensional (3D) T2-weighted sequence sampling perfection with application-optimized contrasts by using flip angle evolution (SPACE) with an axial two-dimensional T2-weighted turbo spin echo (TSE) sequence with regard to overall image quality and the delineation of normal prostate and periprostatic anatomy for low-dose-rate prostate cancer brachytherapy planning evaluation. METHODS AND MATERIALS Patients (n = 69) with prostate cancer who had pelvic magnetic resonance imaging (MRI) for low-dose-rate brachytherapy treatment planning were included. Three radiologists independently assessed the visibility of nine anatomic structures on each sequence by using a 5-point scale and overall image quality by using a 4-point scale. The significance of the differences in diagnostic performance was tested with a Wilcoxon signed rank test. RESULTS No significant intersequence differences were found for most (7/9) anatomical structures and overall image quality. The mean scores for visibility of anatomical structures on the 3D SPACE and 2D TSE sequences, respectively, were as follows: the zonal anatomy (3.7; 3.9, p = 0.05), prostate capsule (3.9; 4.0, p = 0.08), neurovascular bundle (2.9; 2.9, p = 0.9), rectoprostatic angle (3.8; 3.8, p = 0.35), rectum (4.2; 4.3, p = 0.26), urethra (3.8; 3.9, p = 0.12), urinary bladder (4.6; 4.6, p = 0.61), and overall image quality (2.9; 2.9, p = 0.33). 3D SPACE was superior for delineation of the genitourinary diaphragm (3.8; 3.6, p = 0.003), whereas 2D TSE was superior for delineation of the seminal vesicles (3.5; 4.0, p < 0.0001). CONCLUSIONS Anatomic delineation of the prostatic and periprostatic anatomy provided by the 3D SPACE sequence is as robust in quality as that provided by a conventional 2D TSE sequence with superior delineation of the genitourinary diaphragm. For MRI-based brachytherapy treatment planning, the 3D SPACE sequence with subcentimeter isotropic resolution can replace the 2D TSE sequence and be incorporated into standard MRI protocols.
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Affiliation(s)
- Tharakeswara K Bathala
- Department of Abdominal Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX.
| | - Aradhana M Venkatesan
- Department of Abdominal Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Jingfei Ma
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Priyadarshini Bhosale
- Department of Abdominal Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Wei Wei
- Cancer Biostatistics Section, Taussig Cancer Institute, Cleveland Clinic, Cleveland, OH
| | - Rajat J Kudchadker
- Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Jihong Wang
- Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Mitchell S Anscher
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Chad Tang
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Teresa L Bruno
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Steven J Frank
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Janio Szklaruk
- Department of Abdominal Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX
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Moawad AW, Fuentes D, Khalaf AM, Blair KJ, Szklaruk J, Qayyum A, Hazle JD, Elsayes KM. Feasibility of Automated Volumetric Assessment of Large Hepatocellular Carcinomas' Responses to Transarterial Chemoembolization. Front Oncol 2020; 10:572. [PMID: 32457831 PMCID: PMC7221016 DOI: 10.3389/fonc.2020.00572] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 03/30/2020] [Indexed: 12/13/2022] Open
Abstract
Background: Hepatocellular carcinoma (HCC) is the most common liver malignancy and the leading cause of death in patients with cirrhosis. Various treatments for HCC are available, including transarterial chemoembolization (TACE), which is the commonest intervention performed in HCC. Radiologic tumor response following TACE is an important prognostic factor for patients with HCC. We hypothesized that, for large HCC tumors, assessment of treatment response made with automated volumetric response evaluation criteria in solid tumors (RECIST) might correlate with the assessment made with the more time- and labor-intensive unidimensional modified RECIST (mRECIST) and manual volumetric RECIST (M-vRECIST) criteria. Accordingly, we undertook this retrospective study to compare automated volumetric RECIST (A-vRECIST) with M-vRECIST and mRESIST for the assessment of large HCC tumors' responses to TACE. Methods:We selected 42 pairs of contrast-enhanced computed tomography (CT) images of large HCCs. Images were taken before and after TACE, and in each of the images, the HCC was segmented using both a manual contouring tool and a convolutional neural network. Three experienced radiologists assessed tumor response to TACE using mRECIST criteria. The intra-class correlation coefficient was used to assess inter-reader reliability in the mRECIST measurements, while the Pearson correlation coefficient was used to assess correlation between the volumetric and mRECIST measurements. Results:Volumetric tumor assessment using automated and manual segmentation tools showed good correlation with mRECIST measurements. For A-vRECIST and M-vRECIST, respectively, r = 0.597 vs. 0.622 in the baseline studies; 0.648 vs. 0.748 in the follow-up studies; and 0.774 vs. 0.766 in the response assessment (P < 0.001 for all). The A-vRECIST evaluation showed high correlation with the M-vRECIST evaluation (r = 0.967, 0.937, and 0.826 in baseline studies, follow-up studies, and response assessment, respectively, P < 0.001 for all). Conclusion:Volumetric RECIST measurements are likely to provide an early marker for TACE monitoring, and automated measurements made with a convolutional neural network may be good substitutes for manual volumetric measurements.
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Affiliation(s)
- Ahmed W. Moawad
- Imaging Physics Department, University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - David Fuentes
- Imaging Physics Department, University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Ahmed M. Khalaf
- Diagnostic Radiology Department, University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Katherine J. Blair
- Diagnostic Radiology Department, University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Janio Szklaruk
- Diagnostic Radiology Department, University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Aliya Qayyum
- Diagnostic Radiology Department, University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - John D. Hazle
- Imaging Physics Department, University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Khaled M. Elsayes
- Diagnostic Radiology Department, University of Texas MD Anderson Cancer Center, Houston, TX, United States
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13
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Moawad AW, Szklaruk J, Lall C, Blair KJ, Kaseb AO, Kamath A, Rohren SA, Elsayes KM. Angiogenesis in Hepatocellular Carcinoma; Pathophysiology, Targeted Therapy, and Role of Imaging. J Hepatocell Carcinoma 2020; 7:77-89. [PMID: 32426302 PMCID: PMC7188073 DOI: 10.2147/jhc.s224471] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 12/24/2019] [Indexed: 12/15/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is one of the most common tumors worldwide, usually occurring on a background of liver cirrhosis. HCC is a highly vascular tumor in which angiogenesis plays a major role in tumor growth and spread. Tumor-induced angiogenesis is usually related to a complex interplay between multiple factors and pathways, with vascular endothelial growth factor being a major player in angiogenesis. In the past decade, understanding of tumor-induced angiogenesis has led to the emergence of novel anti-angiogenic therapies, which act by reducing neo-angiogenesis, and improving patient survival. Currently, Sorafenib and Lenvatinib are being used as the first-line treatment for advanced unresectable HCC. However, a disadvantage of these agents is the presence of numerous side effects. A major challenge in the management of HCC patients being treated with anti-angiogenic therapy is effective monitoring of treatment response, which decides whether to continue treatment or to seek second-line treatment. Several criteria can be used to assess response to treatment, such as quantitative perfusion on cross-sectional imaging and novel/emerging MRI techniques, including a host of known and emerging biomarkers and radiogenomics. This review addresses the pathophysiology of angiogenesis in HCC, accurate imaging assessment of angiogenesis, monitoring effects of anti-angiogenic therapy to guide future treatment and assessing prognosis.
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Affiliation(s)
- Ahmed W Moawad
- Department of Diagnostic Radiology, The University of Texas M. D. Anderson Cancer Center, Houston, TX, USA
| | - Janio Szklaruk
- Department of Diagnostic Radiology, The University of Texas M. D. Anderson Cancer Center, Houston, TX, USA
| | - Chandana Lall
- Department of Radiology, University of Florida College of Medicine, Jacksonville, FL, USA
| | - Katherine J Blair
- Department of Diagnostic Radiology, The University of Texas M. D. Anderson Cancer Center, Houston, TX, USA
| | - Ahmed O Kaseb
- Department of Gastrointestinal Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, TX, USA
| | - Amita Kamath
- Department of Radiology, Icahn School of Medicine at Mount Sinai West, New York, NY, USA
| | - Scott A Rohren
- School of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Khaled M Elsayes
- Department of Diagnostic Radiology, The University of Texas M. D. Anderson Cancer Center, Houston, TX, USA
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Szklaruk J, Son JB, Wei W, Bhosale P, Javadi S, Ma J. Comparison of free breathing and respiratory triggered diffusion-weighted imaging sequences for liver imaging. World J Radiol 2019; 11:134-143. [PMID: 31798795 PMCID: PMC6885723 DOI: 10.4329/wjr.v11.i11.134] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 08/26/2019] [Accepted: 09/26/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Diffusion-weighted imaging (DWI) has become a useful tool in the detection, characterization, and evaluation of response to treatment of many cancers, including malignant liver lesions. DWI offers higher image contrast between lesions and normal liver tissue than other sequences. DWI images acquired at two or more b-values can be used to derive an apparent diffusion coefficient (ADC). DWI in the body has several technical challenges. This include ghosting artifacts, mis-registration and susceptibility artifacts. New DWI sequences have been developed to overcome some of these challenges. Our goal is to evaluate 3 new DWI sequences for liver imaging.
AIM To qualitatively and quantitatively compare 3 DWI sequences for liver imaging: free-breathing (FB), simultaneous multislice (SMS), and prospective acquisition correction (PACE).
METHODS Magnetic resonance imaging (MRI) was performed in 20 patients in this prospective study. The MR study included 3 separate DWI sequences: FB-DWI, SMS-DWI, and PACE-DWI. The image quality, mean ADC, standard deviations (SD) of ADC, and ADC histogram were compared. Wilcoxon signed-rank tests were used to compare qualitative image quality. A linear mixed model was used to compare the mean ADC and the SDs of the ADC values. All tests were 2-sided and P values of < 0.05 were considered statistically significant.
RESULTS There were 56 lesions (50 malignant) evaluated in this study. The mean qualitative image quality score of PACE-DWI was 4.48. This was significantly better than that of SMS-DWI (4.22) and FB-DWI (3.15) (P < 0.05). Quantitatively, the mean ADC values from the 3 different sequences did not significantly differ for each liver lesion. FB-DWI had a markedly higher variation in the SD of the ADC values than did SMS-DWI and PACE-DWI. We found statistically significant differences in the SDs of the ADC values for FB-DWI vs PACE-DWI (P < 0.0001) and for FB-DWI vs SMS-DWI (P = 0.03). The SD of the ADC values was not statistically significant for PACE-DWI and SMS-DWI (P = 0.18). The quality of the PACE-DWI ADC histograms were considered better than the SMS-DWI and FB-DWI.
CONCLUSION Compared to FB-DWI, both PACE-DWI and SMS-DWI provide better image quality and decreased quantitative variability in the measurement of ADC values of liver lesions.
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Affiliation(s)
- Janio Szklaruk
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Jong Bum Son
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Wei Wei
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Priya Bhosale
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Sanaz Javadi
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
| | - Jingfei Ma
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, United States
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15
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Yacoub JH, Elsayes KM, Fowler KJ, Hecht EM, Mitchell DG, Santillan C, Szklaruk J. Pitfalls in liver MRI: Technical approach to avoiding misdiagnosis and improving image quality. J Magn Reson Imaging 2018; 49:41-58. [DOI: 10.1002/jmri.26343] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 08/29/2018] [Accepted: 08/30/2018] [Indexed: 12/27/2022] Open
Affiliation(s)
- Joseph H Yacoub
- Department of Radiology; Medstar Georgetown University Hospital; Washington DC USA
| | - Khaled M. Elsayes
- Department of Diagnostic Radiology; University of Texas MD Anderson Cancer Center; Houston Texas USA
| | - Kathryn J. Fowler
- University of California San Diego Health System, Department of Radiology; San Diego California USA
| | - Elizabeth M. Hecht
- Department of Radiology; New York Presbyterian-Columbia University Medical Center; New York New York
| | - Donald G. Mitchell
- Department of Radiology; Thomas Jefferson University; Philadelphia Pennsylvania USA
| | - Cynthia Santillan
- Liver Imaging Group; University of California San Diego; San Diego California USA
| | - Janio Szklaruk
- Department of Diagnostic Radiology; University of Texas MD Anderson Cancer Center; Houston Texas USA
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16
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Elsayes KM, Kielar AZ, Elmohr MM, Chernyak V, Masch WR, Furlan A, Marks RM, Cruite I, Fowler KJ, Tang A, Bashir MR, Hecht EM, Kamaya A, Jambhekar K, Kamath A, Arora S, Bijan B, Ash R, Kassam Z, Chaudhry H, McGahan JP, Yacoub JH, McInnes M, Fung AW, Shanbhogue K, Lee J, Deshmukh S, Horvat N, Mitchell DG, Do RKG, Surabhi VR, Szklaruk J, Sirlin CB. White paper of the Society of Abdominal Radiology hepatocellular carcinoma diagnosis disease-focused panel on LI-RADS v2018 for CT and MRI. Abdom Radiol (NY) 2018; 43:2625-2642. [PMID: 30155697 DOI: 10.1007/s00261-018-1744-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The Liver Imaging and Reporting Data System (LI-RADS) is a comprehensive system for standardizing the terminology, technique, interpretation, reporting, and data collection of liver imaging with the overarching goal of improving communication, clinical care, education, and research relating to patients at risk for or diagnosed with hepatocellular carcinoma (HCC). In 2018, the American Association for the Study of Liver Diseases (AASLD) integrated LI-RADS into its clinical practice guidance for the imaging-based diagnosis of HCC. The harmonization between the AASLD and LI-RADS diagnostic imaging criteria required minor modifications to the recently released LI-RADS v2017 guidelines, necessitating a LI-RADS v2018 update. This article provides an overview of the key changes included in LI-RADS v2018 as well as a look at the LI-RADS v2018 diagnostic algorithm and criteria, technical recommendations, and management suggestions. Substantive changes in LI-RADS v2018 are the removal of the requirement for visibility on antecedent surveillance ultrasound for LI-RADS 5 (LR-5) categorization of 10-19 mm observations with nonrim arterial phase hyper-enhancement and nonperipheral "washout", and adoption of the Organ Procurement and Transplantation Network definition of threshold growth (≥ 50% size increase of a mass in ≤ 6 months). Nomenclatural changes in LI-RADS v2018 are the removal of -us and -g as LR-5 qualifiers.
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Abstract
Magnetic resonance imaging (MRI) is the modality of choice for liver imaging due to its superior contrast resolution in comparison with computer tomography and the ability to provide both morphologic and physiologic information. The physics of MR are complex, and a detailed understanding is not required to appreciate findings on an MRI exam. Here, we attempt to introduce the basic principles of MRI with respect to hepatic imaging focusing on various commonly encountered hepatic diseases. The purpose is to facilitate an appreciation of the various diagnostic capabilities of MR among hepatic oncologists and surgeons and to foster an understanding of when MR studies may be appropriate in the care of their patients.
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Affiliation(s)
- Lan N Vu
- Department of Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - John N Morelli
- Department of Radiology, St. John's Medical Center, Tulsa, OK, USA
| | - Janio Szklaruk
- Department of Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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18
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Szklaruk J, Kaya D, Wei W. Evaluation of the added value of imaging the pelvis in patients with hepatocellular cancer. J Gastroenterol Hepatol 2018; 33:500-502. [PMID: 28612991 DOI: 10.1111/jgh.13847] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 05/28/2017] [Accepted: 06/11/2017] [Indexed: 01/10/2023]
Abstract
BACKGROUND AND AIM The study aims to evaluate added value of the pelvic portion of the computed tomography (CT) and magnetic resonance imaging (MRI) examination in patients with a primary diagnosis of hepatocellular cancer (HCC). METHODS The study reviewed the medical records of 478 patients with 881 examinations of the abdomen and pelvis who underwent treatment at our institution between March 2015 and March 2016. These patients were reviewed for presence of pathology in the pelvis, which were classified into two categories as new or old (already known on prior imaging). RESULTS Of 478 patients, 230 underwent MRI examination of the abdomen and pelvis, and the other 248 underwent CT scans of these regions. There were no findings on the CT or MRI of the pelvis in 80.5% of patients (n = 385), including 81.5% of those who had CT and 79.6% of those who had MRI. Ninety-three patients had findings in the pelvis, the most common of which were bone metastases (31 patients), ascites (27 patients), implants (seven patients), and bladder wall thickening (five patients). In only 7.9% of patients, the findings were related to metastatic disease. In 5.4% of all imaging studies revealed a new finding in the pelvis. CONCLUSION Imaging of the pelvis (CT or MRI) does not seem to provide additional information in the majority of cases with HCC. The results suggest that the follow-up evaluation of patients with HCC may not include a pelvis exam.
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Affiliation(s)
- Janio Szklaruk
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Diana Kaya
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Wei Wei
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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19
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Yam C, Murthy RK, Valero V, Szklaruk J, Shroff GS, Stalzer CJ, Buzdar AU, Murray JL, Yang W, Hortobagyi GN, Moulder SL, Arun B. A phase II study of tipifarnib and gemcitabine in metastatic breast cancer. Invest New Drugs 2018; 36:299-306. [PMID: 29374384 DOI: 10.1007/s10637-018-0564-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 01/12/2018] [Indexed: 11/26/2022]
Abstract
Background Tipifarnib is an orally active, competitive inhibitor of farnesyltransferase which has shown encouraging signs of activity either alone or when combined with other agents. Clinical studies of tipifarnib in combination with anti-estrogen therapy have yielded disappointing results. In contrast, tipifarnib appears to be synergistic in combination with anthracycline based chemotherapy. Here we report the results of the first prospective phase II trial evaluating the efficacy of the novel combination of tipifarnib and gemcitabine in the treatment of metastatic breast cancer. Patients and Methods 30 postmenopausal women with metastatic breast cancer were treated on a 21-day cycle with tipifarnib 300 mg PO twice daily from days 1 through 14. Gemcitabine was administered intravenously at a dose of 1000 mg/m2 on days 1 and 8. Patients were treated until disease progression or unacceptable toxicity. Results There was one complete response and four partial responses yielding an objective response rate of 16.7%. Median progression-free survival and overall survival was 2.5 months (95% confidence interval: 1.6-5.7 months) and 13.1 months (95% confidence interval: 9.1-20.6 months), respectively. 40% of patients experienced grade 4 neutropenia in this study. Conclusion The combination of tipifarnib and gemcitabine is not well tolerated with high rates of myelosuppression and is not more effective than gemcitabine monotherapy in the treatment of metastatic breast cancer.
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Affiliation(s)
- Clinton Yam
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Dan L. Duncan Building, CPB5.3542, 1515 Holcombe Blvd., Unit 1354, Houston, TX, 77030, USA
| | - Rashmi K Murthy
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Dan L. Duncan Building, CPB5.3542, 1515 Holcombe Blvd., Unit 1354, Houston, TX, 77030, USA
| | - Vicente Valero
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Dan L. Duncan Building, CPB5.3542, 1515 Holcombe Blvd., Unit 1354, Houston, TX, 77030, USA
| | - Janio Szklaruk
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Girish S Shroff
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Carol J Stalzer
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Dan L. Duncan Building, CPB5.3542, 1515 Holcombe Blvd., Unit 1354, Houston, TX, 77030, USA
| | - Aman U Buzdar
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Dan L. Duncan Building, CPB5.3542, 1515 Holcombe Blvd., Unit 1354, Houston, TX, 77030, USA
| | - James L Murray
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Dan L. Duncan Building, CPB5.3542, 1515 Holcombe Blvd., Unit 1354, Houston, TX, 77030, USA
| | - Wei Yang
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Gabriel N Hortobagyi
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Dan L. Duncan Building, CPB5.3542, 1515 Holcombe Blvd., Unit 1354, Houston, TX, 77030, USA
| | - Stacy L Moulder
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Dan L. Duncan Building, CPB5.3542, 1515 Holcombe Blvd., Unit 1354, Houston, TX, 77030, USA
| | - Banu Arun
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Dan L. Duncan Building, CPB5.3542, 1515 Holcombe Blvd., Unit 1354, Houston, TX, 77030, USA.
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20
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Szklaruk J, Luersen G, Ma J, Wei W, Underwood M. Gd-EOB-DTPA based magnetic resonance imaging for predicting liver response to portal vein embolization. World J Radiol 2017; 9:199-205. [PMID: 28529683 PMCID: PMC5415889 DOI: 10.4329/wjr.v9.i4.199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 01/11/2017] [Accepted: 03/02/2017] [Indexed: 02/06/2023] Open
Abstract
AIM To evaluate the correlation between degree of kinetic growth (kGR) of the liver following portal vein embolization (PVE) liver and the enhancement of the during the hepatobiliary phase of contrast administration and to evaluate if the enhancement can be used to predict response to PVE prior to the procedure.
METHODS Seventeen patients were consented for the prospective study. All patients had an MR of the abdomen with Gd-EOB-DTPA. Fourteen patients underwent PVE. The correlation between the kGR of the liver and the degree of enhancement was evaluated with linear regression (strong assumptions) and Spearman’s correlation test (rank based, no assumptions). The correlation was examined for the whole liver, segments I, VIII, VII, VI, V, IV, right liver and left liver.
RESULTS There was no correlation between the degree of enhancement during the hepatobiliary phase and kGR for any segment, lobe of the liver or whole liver (P = 0.19 to 0.91 by Spearman’s correlation test).
CONCLUSION The relative enhancement of the liver during the hepatobiliary phase with Gd-EOB-DTPA cannot be used to predict the liver response to PVE.
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21
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Zurstrassen CE, Bitencourt AGV, Guimaraes MD, Cavalcante ACBS, Tyng CJ, Amoedo MK, Matsushita Junior JPK, Szklaruk J, Marchiori E, Chojniak R. Percutaneous stent placement for the treatment of malignant biliary obstruction: nitinol versus elgiloy stents. Radiol Bras 2017; 50:97-102. [PMID: 28428652 PMCID: PMC5396999 DOI: 10.1590/0100-3984.2015.0183] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Objective This study aimed to compare two self-expanding stents, a nitinol stent and an
elgiloy stent, both placed percutaneously, in terms of their efficacy in
palliating inoperable malignant biliary obstruction. Materials and Methods We retrospectively investigated 99 patients with unresectable malignant
biliary obstruction treated with percutaneous placement of a self-expanding
metallic stent at our institution between May 2007 and January 2010. Serum
bilirubin and liver enzyme levels were measured before and 30 days after
stenting. For all procedures using elgiloy or nitinol stents, stent
occlusion and patient survival rates were calculated using Kaplan-Meyer
analysis. Results All of the patients showed clinical improvement after stent placement, with
no difference between the two groups. In both groups, the occlusion-free
survival rate was 67% at 30 days, 37% at 90 days, 25% at 180 days, and 10%
at 360 days, with no significant difference in relation to the type of
stent. Conclusion The two stents evaluated showed comparable efficacy for the percutaneous
treatment of unresectable biliary malignancy, with good clinical
results.
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Affiliation(s)
| | | | - Marcos Duarte Guimaraes
- Staff Physician in the Department of Imaging, A.C.Camargo Cancer Center, São Paulo, SP, Assistant Professor of Radiology, Universidade Federal do Vale do São Francisco (UNIVASF), Petrolina, PE, Brazil
| | | | - Chiang Jeng Tyng
- Staff Physician in the Department of Imaging, A.C.Camargo Cancer Center, São Paulo, SP, Brazil
| | - Mauricio Kauark Amoedo
- Staff Physician in the Department of Imaging, A.C.Camargo Cancer Center, São Paulo, SP, Brazil
| | | | - Janio Szklaruk
- Professor of Radiology, Department of Diagnostic Radiology, Division of Diagnostic Imaging, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Edson Marchiori
- Full Professor of Radiology, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil
| | - Rubens Chojniak
- Head of the Department of Imaging, A.C.Camargo Cancer Center, São Paulo, SP, Brazil
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22
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Elsayes KM, Kielar AZ, Agrons MM, Szklaruk J, Tang A, Bashir MR, Mitchell DG, Do RK, Fowler KJ, Chernyak V, Sirlin CB. Liver Imaging Reporting and Data System: an expert consensus statement. J Hepatocell Carcinoma 2017; 4:29-39. [PMID: 28255543 PMCID: PMC5322844 DOI: 10.2147/jhc.s125396] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The increasing incidence and high morbidity and mortality of hepatocellular carcinoma (HCC) have inspired the creation of the Liver Imaging Reporting and Data System (LI-RADS). LI-RADS aims to reduce variability in exam interpretation, improve communication, facilitate clinical therapeutic decisions, reduce omission of pertinent information, and facilitate the monitoring of outcomes. LI-RADS is a dynamic process, which is updated frequently. In this article, we describe the LI-RADS 2014 version (v2014), which marks the second update since the initial version in 2011.
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Affiliation(s)
- Khaled M Elsayes
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ania Z Kielar
- Department of Diagnostic Radiology, University of Ottawa, Ottawa, ON, Canada
| | - Michelle M Agrons
- Department of Diagnostic Radiology, Baylor College of Medicine, Houston, TX, USA
| | - Janio Szklaruk
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - An Tang
- Department of Radiology, Radio-Oncology and Nuclear Medicine, Université de Montréal, Montreal, QC, Canada
| | - Mustafa R Bashir
- Department of Diagnostic Radiology, Duke University School of Medicine, Durham, NC
| | - Donald G Mitchell
- Department of Diagnostic Radiology, Thomas Jefferson University, Philadelphia, PA
| | - Richard K Do
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Kathryn J Fowler
- Mallinckrodt Institute of Radiology, Washington University in Saint Louis, Saint Louis, MO
| | - Victoria Chernyak
- Department of Radiology Albert Einstein College of Medicine, Bronx, New York, NY
| | - Claude B Sirlin
- Department of Diagnostic Radiology, University of California, San Diego, CA, USA
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Yedururi S, Kang HC, Wei W, Wagner-Bartak NA, Marcal LP, Stafford RJ, Willis BJ, Szklaruk J. Free-breathing radial volumetric interpolated breath-hold examination vs breath-hold cartesian volumetric interpolated breath-hold examination magnetic resonance imaging of the liver at 1.5T. World J Radiol 2016; 8:707-715. [PMID: 27551341 PMCID: PMC4965355 DOI: 10.4329/wjr.v8.i7.707] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 04/05/2016] [Accepted: 04/18/2016] [Indexed: 02/06/2023] Open
Abstract
AIM: To compare breath-hold cartesian volumetric interpolated breath-hold examination (cVIBE) and free-breathing radial VIBE (rVIBE) and determine whether rVIBE could replace cVIBE in routine liver magnetic resonance imaging (MRI).
METHODS: In this prospective study, 15 consecutive patients scheduled for routine MRI of the abdomen underwent pre- and post-contrast breath-hold cVIBE imaging (19 s acquisition time) and free-breathing rVIBE imaging (111 s acquisition time) on a 1.5T Siemens scanner. Three radiologists with 2, 4, and 8 years post-fellowship experience in abdominal imaging evaluated all images. The radiologists were blinded to the sequence types, which were presented in a random order for each patient. For each sequence, the radiologists scored the cVIBE and rVIBE images for liver edge sharpness, hepatic vessel clarity, presence of artifacts, lesion conspicuity, fat saturation, and overall image quality using a five-point scale.
RESULTS: Compared to rVIBE, cVIBE yielded significantly (P < 0.001) higher scores for liver edge sharpness (mean score, 3.87 vs 3.37), hepatic-vessel clarity (3.71 vs 3.18), artifacts (3.74 vs 3.06), lesion conspicuity (3.81 vs 3.2), and overall image quality (3.91 vs 3.24). cVIBE and rVIBE did not significantly differ in quality of fat saturation (4.12 vs 4.03, P = 0.17). The inter-observer variability with respect to differences between rVIBE and cVIBE scores was close to zero compared to random error and inter-patient variation. Quality of rVIBE images was rated as acceptable for all parameters.
CONCLUSION: rVIBE cannot replace cVIBE in routine liver MRI. At 1.5T, free-breathing rVIBE yields acceptable, although slightly inferior image quality compared to breath-hold cVIBE.
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Faria SC, Szklaruk J, Kaseb AO, Hassabo HM, Elsayes KM. TNM/Okuda/Barcelona/UNOS/CLIP International Multidisciplinary Classification of Hepatocellular Carcinoma: concepts, perspectives, and radiologic implications. ACTA ACUST UNITED AC 2015; 39:1070-87. [PMID: 24695938 DOI: 10.1007/s00261-014-0130-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Hepatocellular carcinoma (HCC) is a major health problem worldwide. Moreover, the liver cancer field is evolving rapidly, with early diagnosis, new therapies, and a better understanding of HCC's biology and development. Accurate staging is important for determining prognosis and selecting the most appropriate treatment for each patient. Surgical intervention remains the most effective treatment for HCC and is the only potentially curative modality. However, in HCC patients, overall survival is also independently affected by underlying liver disease and cirrhosis, which in turn affect the applicability and efficacy of treatment. Although several staging classification and prognostic scoring systems have been proposed for determining the stage and prognosis of HCC, no consensus exists on the best classification method. The most common staging classification systems include tumor-node-metastasis stage, Okuda staging, Cancer of the Liver Italian Program score, Barcelona Clinic Liver Cancer staging classification, the French, the Chinese University Prognostic Index, Japanese Integrated Scoring, and the Tokyo score. Radiologists should be aware of the different staging classification systems for HCC and familiar with the system relevant to their respective referring clinicians, as it will provide pertinent radiological evaluation for multidisciplinary management.
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Affiliation(s)
- Silvana C Faria
- Department of Diagnostic Radiology, Unit 1473, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX, 77030, USA
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25
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Abstract
Cross-sectional imaging with computed tomography or magnetic resonance imaging is routinely used to detect and diagnose liver lesions; however, these examinations can provide additional important information. The improvement of equipment and techniques has allowed outstanding evaluation of the vascular and biliary anatomy, which is practicable in most routine examinations. Anatomical variants may exclude patients from certain therapeutic options and may be the cause of morbidity or mortality after surgery or interventional procedures. Diffuse liver disease, such as steatosis, hemochromatosis, or fibrosis, must be diagnosed and quantified. Usually these conditions are silent until the late stages, and imaging plays an important role in detecting them early. Additionally, a background of diffuse disease may interfere in a focal lesion systematic reasoning. The diagnostic probability of a particular nodule varies according to the background liver disease. Nowadays, most diffuse liver diseases can be easily and accurately quantified by imaging, which has allowed better understanding of these diseases and improved patient management. Finally, cross-sectional imaging can calculate total and partial liver volumes and estimate the future liver remnant after hepatectomy. This information helps to select patients for portal vein embolization and reduces postoperative complications. Use of a specific hepatic contrast agent on magnetic resonance imaging, in addition to improving detection and characterization of focal lesions, provides functional global and segmental information about the liver parenchyma.
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Affiliation(s)
- Gustavo Felipe Luersen
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Priya Bhosale
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Janio Szklaruk
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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26
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Neperud J, Mahvash A, Garg N, Murthy R, Szklaruk J. Can imaging patterns of neuroendocrine hepatic metastases predict response yttruim-90 radioembolotherapy? World J Radiol 2013; 5:241-247. [PMID: 23807902 PMCID: PMC3692962 DOI: 10.4329/wjr.v5.i6.241] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 04/11/2013] [Accepted: 05/19/2013] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the response to treatment in patients with neuroendocrine tumor liver metastases following yttrium-90 (90Y) radioembolotherapy, as a function of image patterns at presentation for 90Y radioembolotherapy.
METHODS: The study cohort consisted of patients with hepatic metastatic neuroendocrine tumors treated with 90Y at our institution during a two-year time period. Hepatic metastases were evaluated on a pre-therapy study assessing relative arterial enhancement compared to liver, lesion size, necrosis of the lesion, and associated tumor burden in the liver. We used six response criteria: Response Evaluation Criteria in Solid Tumors (RECIST) size, World Health Organization (WHO) size, European Association for the Study of the Liver (EASL) necrosis guidelines, Choi size, Choi necrosis and combination of Choi size and necrosis.
RESULTS: About 65 lesions in 17 patients met study criteria and formed the cohort. Statistically significant response was found for lesions < 5 cm vs those ≥ 5 cm with RECIST (P = 0.04), WHO (P = 0.002) and combined Choi criteria (P = 0.02). Hyperenhancing lesions demonstrated greater response only with the Choi size criteria (P = 0.04). Lesions with ≤ 50% necrosis on the pre-scan had statistically significant greater response with the Choi necrosis criteria (P = 0.01). There was no statistical significance for response comparing lesions < 2 cm vs≥ 2 cm or in comparing the degrees of tumor burden.
CONCLUSION: Based on our findings in this study, it is suggested that initial imaging findings, as listed above, are not a good predictor of response to 90Y radioembolization.
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Morani AC, Elsayes KM, Liu PS, Weadock WJ, Szklaruk J, Dillman JR, Khan A, Chenevert TL, Hussain HK. Abdominal applications of diffusion-weighted magnetic resonance imaging: Where do we stand. World J Radiol 2013; 5:68-80. [PMID: 23671743 PMCID: PMC3650207 DOI: 10.4329/wjr.v5.i3.68] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2012] [Revised: 10/21/2012] [Accepted: 01/31/2013] [Indexed: 02/06/2023] Open
Abstract
Diffusion-weighted imaging (DWI) is one of the magnetic resonance imaging (MRI) sequences providing qualitative as well as quantitative information at a cellular level. It has been widely used for various applications in the central nervous system. Over the past decade, various extracranial applications of DWI have been increasingly explored, as it may detect changes even before signal alterations or morphological abnormalities become apparent on other pulse sequences. Initial results from abdominal MRI applications are promising, particularly in oncological settings and for the detection of abscesses. The purpose of this article is to describe the clinically relevant basic concepts of DWI, techniques to perform abdominal DWI, its analysis and applications in abdominal visceral MR imaging, in addition to a brief overview of whole body DWI MRI.
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28
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Ganeshan D, Moron FE, Szklaruk J. Extrahepatic biliary cancer: New staging classification. World J Radiol 2012; 4:345-52. [PMID: 22937214 PMCID: PMC3430732 DOI: 10.4329/wjr.v4.i8.345] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 07/19/2012] [Accepted: 07/26/2012] [Indexed: 02/06/2023] Open
Abstract
Tumor staging defines the point in the natural history of the malignancy when the diagnosis is made. The most common staging system for cancer is the tumor, node, metastases classification. Staging of cancers provides useful parameters in the determination of the extent of disease and prognosis. Cholangiocarcinoma are rare and refers to cancers that arise from the biliary epithelium. These tumors can occur anywhere along the biliary tree. These tumors have been previously divided into extrahepatic and intrahepatic lesions. Until recently the extrahepatic bile duct tumors have been considered as a single entity per American Joint Commission on Cancer (AJCC) staging classification. The most recent changes to the AJCC classification of bile duct cancers divide the tumors into two major categories: proximal and distal tumors. This practical classification is based on anatomy and surgical management. High quality cross-sectional computed tomography (CT) and/or magnetic resonance (MR) imaging of the abdomen are essential information to accurately stage this tumors. Imaging plays an important role in diagnosis, localization, staging and optimal management of cholangiocarcinoma. For example, it helps to localize the tumor to either perihilar or distal bile duct, both of which have different management. Further, it helps to accurately stage the disease and identify the presence of significant nodal and distant metastasis, which may preclude surgery. Also, it helps to identify the extent of local invasion, which has a major impact on the management. For example, extensive involvement of hepatic duct reaching up to second-order biliary radicals or major vascular encasement of portal vein or hepatic arteries precludes curative surgery and patient may be managed by palliative therapy. Further, imaging helps to identify any anatomical variations in the hepatic arterial or venous circulation and biliary ductal system, which is vital information for surgical planning. This review presents relevant clinical presentation and imaging acquisition and presentation for the accurate staging classification of bile duct tumors based on the new AJCC criteria. This will be performed with the assistance of anatomical diagrams and representative CT and MR images. The image interpretation must include all relevant imaging information for optimum staging. Detailed recommendations on the items required on the radiology report will be presented.
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29
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Tamm EP, Szklaruk J, Puthooran L, Stone D, Stevens BL, Modaro C. Quality initiatives: planning, setting up, and carrying out radiology process improvement projects. Radiographics 2012; 32:1529-42. [PMID: 22745219 DOI: 10.1148/rg.325125013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In the coming decades, those who provide radiologic imaging services will be increasingly challenged by the economic, demographic, and political forces affecting healthcare to improve their efficiency, enhance the value of their services, and achieve greater customer satisfaction. It is essential that radiologists master and consistently apply basic process improvement skills that have allowed professionals in many other fields to thrive in a competitive environment. The authors provide a step-by-step overview of process improvement from the perspective of a radiologic imaging practice by describing their experience in conducting a process improvement project: to increase the daily volume of body magnetic resonance imaging examinations performed at their institution. The first step in any process improvement project is to identify and prioritize opportunities for improvement in the work process. Next, an effective project team must be formed that includes representatives of all participants in the process. An achievable aim must be formulated, appropriate measures selected, and baseline data collected to determine the effects of subsequent efforts to achieve the aim. Each aspect of the process in question is then analyzed by using appropriate tools (eg, flowcharts, fishbone diagrams, Pareto diagrams) to identify opportunities for beneficial change. Plans for change are then established and implemented with regular measurements and review followed by necessary adjustments in course. These so-called PDSA (planning, doing, studying, and acting) cycles are repeated until the aim is achieved or modified and the project closed.
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Affiliation(s)
- Eric P Tamm
- Department of Diagnostic Radiology, University of Texas MD Anderson Cancer Center, Houston, TX 77230-1402, USA.
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30
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Patnana M, Bronstein Y, Szklaruk J, Bedi DG, Hwu WJ, Gershenwald JE, Prieto VG, Ng CS. Multimethod imaging, staging, and spectrum of manifestations of metastatic melanoma. Clin Radiol 2011; 66:224-36. [PMID: 21295201 DOI: 10.1016/j.crad.2010.10.014] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Revised: 10/16/2010] [Accepted: 10/22/2010] [Indexed: 02/07/2023]
Abstract
The incidence of melanoma has been steadily increasing. Imaging plays an important role in tumour assessment as metastatic melanoma can involve multiple organs. Computed tomography (CT) is currently the most widely used technique for tumour staging, surveillance and assessment of therapeutic response, but ultrasound, magnetic resonance imaging (MRI) and positron-emission tomography (PET)-CT also play important roles in the imaging of this tumour. In this article, we review the pathways of spread, staging according to the recently updated TNM classification, pathology, typical and atypical imaging features at common and uncommon sites, and treatment of metastatic melanoma.
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Affiliation(s)
- M Patnana
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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31
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Abstract
Endometriosis of the liver is an uncommon disease characterized by the presence of endometrial tissue in the liver. There are no pathognomonic radiological features for hepatic endometriosis and preoperative diagnosis is difficult by imaging. Most cases are diagnosed after surgery. We report atypical imaging features of hepatic endometriosis in a 61 year-old female that mimic metastatic disease to the liver. She was referred to our institution with a presumed diagnosis of metastatic neuroendocrine tumors to the liver. After imaging guided core biopsy and histologic and immunohistochemical analysis, the diagnosis of hepatic endometrial stromal proliferation was made. We review the literature and provide imaging features that may help in reaching the correct diagnosis of hepatic endometriosis.
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Affiliation(s)
- Mohamed Asran
- Department of Diagnostic Radiology, University of Texas, MD Anderson Cancer Center, Houston, TX, USA
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32
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Maniam S, Szklaruk J. Magnetic resonance imaging: Review of imaging techniques and overview of liver imaging. World J Radiol 2010; 2:309-22. [PMID: 21160685 PMCID: PMC2999331 DOI: 10.4329/wjr.v2.i8.309] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Revised: 06/24/2010] [Accepted: 07/15/2010] [Indexed: 02/06/2023] Open
Abstract
Magnetic resonance imaging (MRI) of the liver is slowly transitioning from a problem solving imaging modality to a first line imaging modality for many diseases of the liver. The well established advantages of MRI over other cross sectional imaging modalities may be the basis for this transition. Technological advancements in MRI that focus on producing high quality images and fast imaging, increasing diagnostic accuracy and developing newer function-specific contrast agents are essential in ensuring that MRI succeeds as a first line imaging modality. Newer imaging techniques, such as parallel imaging, are widely utilized to shorten scanning time. Diffusion weighted echo planar imaging, an adaptation from neuroimaging, is fast becoming a routine part of the MRI liver protocol to improve lesion detection and characterization of focal liver lesions. Contrast enhanced dynamic T1 weighted imaging is crucial in complete evaluation of diseases and the merit of this dynamic imaging relies heavily on the appropriate timing of the contrast injection. Newer techniques that include fluoro-triggered contrast enhanced MRI, an adaptation from 3D MRA imaging, are utilized to achieve good bolus timing that will allow for optimum scanning. For accurate interpretation of liver diseases, good understanding of the newer imaging techniques and familiarity with typical imaging features of liver diseases are essential. In this review, MR sequences for a time efficient liver MRI protocol utilizing newer imaging techniques are discussed and an overview of imaging features of selected common focal and diffuse liver diseases are presented.
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Merkle EM, Szklaruk J, Taouli B. Imaging techniques in the diagnosis of hepatocellular carcinoma and metastatic carcinoma as a result of colon cancer. Gastroenterol Hepatol (N Y) 2010; 6:1-16. [PMID: 21475387 PMCID: PMC2950625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Affiliation(s)
- Elmar M Merkle
- Professor of Radiology Director of MR Imaging Medical Director, Center for Advanced MR Development Duke University Medical Center Durham, North Carolina
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34
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Le-Petross H, Kundra V, Szklaruk J, Wei W, Hortobagyi GN, Ma J. Fast three-dimensional dual echo dixon technique improves fat suppression in breast MRI. J Magn Reson Imaging 2010; 31:889-94. [DOI: 10.1002/jmri.22067] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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Abstract
The development of multidetector row computed tomography (MDCT) has led to the acquisition of true isotropic voxels that can be postprocessed to yield images in any plane of the same resolution as the original axially acquired images. This, coupled with rapid MDCT imaging during peak target organ enhancement has led to a variety of means to review imaging information beyond that of the axial perspective. Postprocessing can be utilized to identify variant biliary anatomy to guide preoperative planning of biliary-related surgery, determine the level and cause of biliary obstruction and assist in staging of biliary cancer. Postprocessing can also be used to identify pancreatic ductal variants, visualize diagnostic features of pancreatic cystic lesions, diagnose and stage pancreatic cancer, and differentiate pancreatic from peripancreatic disease.
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Affiliation(s)
- Eric P Tamm
- Department of Diagnostic Radiology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
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36
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Borghero Y, Crane CH, Szklaruk J, Oyarzo M, Curley S, Pisters PW, Evans D, Abdalla EK, Thomas MB, Das P, Wistuba II, Krishnan S, Vauthey JN. Extrahepatic bile duct adenocarcinoma: patients at high-risk for local recurrence treated with surgery and adjuvant chemoradiation have an equivalent overall survival to patients with standard-risk treated with surgery alone. Ann Surg Oncol 2008; 15:3147-56. [PMID: 18754070 DOI: 10.1245/s10434-008-9998-7] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2007] [Revised: 05/02/2008] [Accepted: 05/02/2008] [Indexed: 02/03/2023]
Abstract
BACKGROUND Patients with resected extrahepatic bile duct adenocarcinoma who have microscopically positive resection margins and/or pathologic locoregional nodal involvement (R1pN1) have a high-risk of locoregional recurrence, and therefore, we advocate the use of adjuvant chemoradiation. To evaluate the safety and effectiveness of this treatment, we compared survival and side effects outcomes between such patients and patients with negative resection margins and pathologically negative nodes (R0pN0) who did not receive adjuvant treatment. METHODS Between 1984 and 2005, 65 patients were treated with curative-intended resection for extrahepatic bile duct adenocarcinoma. Patients with tumors arising in the gallbladder and periampullary region were excluded. Pathology and diagnostic images were centrally reviewed. Overall survival and locoregional recurrence outcomes for patients with standard-risk R0pN0 (surgery alone, or S group, n = 23) were compared with those of patients with high locoregional recurrence risk, R1 and/or pN1 (R1pN1) status who received adjuvant chemoradiation (S-CRT group, n = 42). RESULTS The median follow-up for the entire group was 31 months. Patients in the S-CRT and S groups had a similar 5-year overall survival (36% vs. 42%, P = .6) and locoregional recurrence (5-year rate: 38% vs. 37%, P = .13). In the S-CRT group, three patients (7%) experienced an acute (grade 3 or more) side effect. CONCLUSIONS Our finding of a lack of a survival difference between the S and S-CRT groups suggests that for patients with extrahepatic bile duct adenocarcinoma at high risk for locoregional recurrence (i.e., R1 resection or pN1 disease), adjuvant chemoradiation provides an equivalent overall survival despite of these worse prognostic features.
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Affiliation(s)
- Yerko Borghero
- Department of Radiation Oncology, The University of Texas M D Anderson Cancer Center, 1515 Holcombe Blvd., Unit 97, Houston, TX 77030, USA.
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37
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Bhosale PR, Patnana M, Viswanathan C, Szklaruk J. The inguinal canal: anatomy and imaging features of common and uncommon masses. Radiographics 2008; 28:819-35; quiz 913. [PMID: 18480486 DOI: 10.1148/rg.283075110] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A variety of benign and malignant masses can be found in the inguinal canal (IC). Benign causes of masses in the IC include spermatic cord lipoma, hematoma, abscess, neurofibroma, varicocele, desmoid tumor, air, bowel contrast material, hydrocele, and prostheses. Primary neoplasms of the IC include liposarcoma, Burkitt lymphoma, testicular carcinoma, and sarcoma. Metastases to the IC can occur from alveolar rhabdomyosarcoma, monophasic sarcoma, prostate cancer, Wilms tumor, carcinoid tumor, melanoma, or pancreatic cancer. In patients with a known malignancy and peritoneal carcinomatosis, the diagnosis of metastases can be suggested when a mass is detected in the IC. When peritoneal disease is not evident, a mass in the IC is indicative of stage IV disease and may significantly alter clinical and surgical treatment of the patient. A combination of the clinical history, symptoms, laboratory values, and radiologic features aids the radiologist in accurately diagnosing mass lesions of the IC. Supplemental material available at radiographics.rsnajnls.org/cgi/content/full/28/3/819/DC1.
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Affiliation(s)
- Priya R Bhosale
- Department of Radiology, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Box 368, Houston, TX 77030, USA.
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Beddar AS, Briere TM, Balter P, Pan T, Tolani N, Ng C, Szklaruk J, Krishnan S. 4D-CT imaging with synchronized intravenous contrast injection to improve delineation of liver tumors for treatment planning. Radiother Oncol 2008; 87:445-8. [PMID: 18194819 DOI: 10.1016/j.radonc.2007.12.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2007] [Revised: 12/05/2007] [Accepted: 12/11/2007] [Indexed: 12/14/2022]
Abstract
We have developed a tumor-specific protocol for the 4D-CT imaging of liver tumors using synchronized intravenous (IV) contrast injection to improve the accuracy of tumor delineation for treatment planning. Most liver metastases and cholangiocarcinomas can be imaged in the portal venous phase, while hepatocellular carcinomas are most visible in the delayed phase. Combined 4D-CT imaging with synchronized IV contrast allows for both enhancement of tumor contrast and coverage over the entire breathing cycle.
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Affiliation(s)
- A Sam Beddar
- Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, TX 77030, USA.
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40
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Szklaruk J, Bhosale P. Hepatocellular carcinoma: MRI and CT examination. Isr Med Assoc J 2007; 9:153-5. [PMID: 17402324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Hepatocellular carcinoma will continue to be one of the most common malignancies worldwide. Improved survival occurs following resection or liver transplantation. The appropriate pre-operative stratification and staging of these patients is essential. CT and MRI will undoubtedly continue to play a major role in the detection and diagnosis of HCC. These imaging techniques should be optimized for the evaluation of suspected HCC. The radiology report from the CT or MRI examination should include a comprehensive review of key diagnostic information for appropriate staging. This includes lesion size and number. Also to be noted are segmental and vascular involvement, regional and distant adenopathy as well as metastases, and finally, the presence of ascites, varices and cirrhosis.
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Affiliation(s)
- Janio Szklaruk
- Department of Diagnostic Radiology, UT MD Anderson Cancer Center, Houston, TX, USA.
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Yao JC, Zhang JX, Rashid A, Yeung SCJ, Szklaruk J, Hess K, Xie K, Ellis L, Abbruzzese JL, Ajani JA. Clinical and In vitro Studies of Imatinib in Advanced Carcinoid Tumors. Clin Cancer Res 2007; 13:234-40. [PMID: 17200360 DOI: 10.1158/1078-0432.ccr-06-1618] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Effective systemic therapy options for carcinoid tumors are lacking. We conducted in vitro studies and a phase II clinical trial to explore the activity of imatinib in carcinoid tumors. EXPERIMENTAL DESIGN Cells of the human bronchial carcinoid cell line NCI-H727 and the human pancreatic carcinoid cell line BON-1 were treated with increasing concentrations of imatinib using standard procedures to assess in vitro growth-inhibitory activity. A clinical trial using a two-stage phase II design to assess the response rate and safety profile of imatinib at a dose of 400 mg given twice daily in patients with advanced carcinoid tumors was completed. RESULTS In both cell lines, there was a dose- and time-dependent cytotoxic effect. The clinical trial enrolled 27 evaluable patients. Median duration on trial was 16 weeks. One patient had a partial response, 17 had stable disease, and 9 had progressive disease by the Response Evaluation Criteria in Solid Tumors criteria. Median progression-free survival time was 24 weeks. Median overall survival is 36 months. Seven patients who achieved a biochemical response had a superior progression-free survival time compared with patients without biochemical response (115 weeks compared with 24 weeks; P = 0.003). An increase in plasma basic fibroblast growth factor was associated with a shorter progression-free survival duration (P = 0.02). CONCLUSIONS Our data suggest that imatinib is active in vitro and has a modest clinical activity in carcinoid patients. Changes in tumor markers may help select patients who are likely to benefit from therapy.
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Affiliation(s)
- James C Yao
- Department of Gastrointestinal Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030, USA.
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Abstract
The incidence of hepatocellular carcinoma has been rising in the USA in the past two decades. Hepatocellular carcinoma primarily affects older people and reaches its highest prevalence among those aged between 50 and 70 years. Chronic infection by the hepatitis B virus is the most common cause of this disease. Since hepatocellular carcinoma is an indolent tumor, it has a low life expectancy. In patients with suspected hepatocellular carcinoma, CT, MRI, and ultrasound techniques are useful for formulating the diagnosis based on vascularity and specific enhancement features. In this paper we will discuss the multimodal approach for diagnosis and surveillance of hepatocellular carcinoma. We will also furnish the latest staging and treatment, epidemiology, clinical presentation, pathology and laboratory findings in hepatocellular carcinoma.
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Affiliation(s)
- P Bhosale
- Department of Radiology, Division of Diagnostic Imaging, University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA.
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Mehta S, Szklaruk J, Faria SC, Raymond AK, Whitman GJ. Radiologic-Pathologic Conferences of The University of Texas M. D. Anderson Cancer Center. AJR Am J Roentgenol 2006; 186:467-9. [PMID: 16423954 DOI: 10.2214/ajr.05.1108] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Sumit Mehta
- Division of Diagnostic Imaging, The University of Texas M. D. Anderson Cancer Center, Unit 1350, 1515 Holcombe Blvd., Houston, TX 77230, USA
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Abstract
Primary hepatocellular carcinoma (HCC) is a significant tumor worldwide and represents the most common primary hepatic neoplasm. Staging criteria are important for appreciation of timely work up of these neoplasms in contradiction with surgical colleagues. This article demonstrates the appearance of HCC on multiphasic, multidetector CT (MDCT) and relates these findings to current staging criteria. The variable appearance on different planes of contrast is critical to appreciate in staging this neoplasm. The hypervascular nature of the primary tumor makes MDCT and three-phase imaging a critical feature in the detection and characterization of this tumor. This is especially critical in the patients who are candidates for surgical resection. Additionally, MDCT has allowed arterial phase imaging to define the vascular supply of the tumor. An accurate representation of the size and number of lesions is critical in not only the initial staging but also the follow-up of hepatocellular carcinoma. The post-treatment features including the appearance post-surgically and after radiofrequency ablation can be well appreciated on MDCT.
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Affiliation(s)
- Paul M Silverman
- Department of Radiology, University of Texas M. D. Anderson Cancer Center, Houston, TX, USA.
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Murthy R, Nunez R, Szklaruk J, Erwin W, Madoff DC, Gupta S, Ahrar K, Wallace MJ, Cohen A, Coldwell DM, Kennedy AS, Hicks ME. Yttrium-90 Microsphere Therapy for Hepatic Malignancy: Devices, Indications, Technical Considerations, and Potential Complications. Radiographics 2005; 25 Suppl 1:S41-55. [PMID: 16227496 DOI: 10.1148/rg.25si055515] [Citation(s) in RCA: 222] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Management of hepatic malignancies is a ubiquitous medical problem. Surgical resection of primary or metastatic liver cancer, with or without adjuvant chemotherapy, is the most effective method for enhancing survival; however, hepatic malignancies in the vast majority of patients are unresectable both at initial manifestation and at recurrence. In these patients, palliative cytoreductive therapies may help to retard tumor progression and therefore favorably alter the course of the disease. Since hepatic neoplasms are principally supplied by the hepatic artery, various arterially delivered cytotoxic agents have been developed to achieve these objectives. Recently, the Food and Drug Administration approved the transarterial administration of yttrium-90 microspheres for liver-directed therapy. Effective use of these devices requires knowledge of the accumulated clinical experience and a dedicated multidisciplinary effort to ensure optimal outcomes and avoid therapy-specific life-threatening complications.
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Affiliation(s)
- Ravi Murthy
- Interventional Radiology Section, Division of Diagnostic Imaging, University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd, Unit 325, Houston, TX 77030, USA.
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Abstract
Female pelvic masses most commonly arise from the reproductive tract, although masses may arise from other structures in the pelvis, such as the gastrointestinal or urinary tracts. The evaluation of a pelvic mass often begins with the physical exam and proceeds to ultrasound, computed tomography, or magnetic resonance imaging. Each of these modalities has a role in the work-up of pelvic masses and each modality has inherent advantages and disadvantages. The focus of this article is to demonstrate the imaging features and role of MRI, in contrast to CT, for detecting, characterizing, and staging pelvic masses. The differential diagnosis for pelvic masses is extremely broad. Clinical history, precise anatomical localization, and MR imaging characterization can significantly narrow the differential diagnosis. With recent advances in therapeutic strategies, a non-invasive, preoperative diagnosis is highly desirable to suggest prognosis and to tailor the treatment approach.
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Affiliation(s)
- Catherine Devine
- Diagnostic Radiology, Department of Diagnostic Imaging, University of Texas M.D. Anderson Cancer Center, Houston, TX 77030, USA
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48
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Murthy R, Xiong H, Nunez R, Cohen AC, Barron B, Szklaruk J, Madoff DC, Gupta S, Wallace MJ, Ahrar K, Hicks ME. Yttrium 90 resin microspheres for the treatment of unresectable colorectal hepatic metastases after failure of multiple chemotherapy regimens: preliminary results. J Vasc Interv Radiol 2005; 16:937-45. [PMID: 16002501 DOI: 10.1097/01.rvi.0000161142.12822.66] [Citation(s) in RCA: 115] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
PURPOSE Responses to liver-directed therapy with yttrium 90 microspheres (SIR-Spheres) and adjuvant intraarterial chemotherapy have occurred in patients with unresectable colorectal hepatic metastases who had received less than one chemotherapy regimen. Now, SIR-Spheres are being used to treat patients with advanced disease who have received multiple chemotherapy regimens. A retrospective analysis was performed to determine the technical feasibility of SIR-Sphere treatment in this population. MATERIALS AND METHODS The medical records of 12 patients with hepatic metastatic disease and intrahepatic progression after multiple chemotherapy regimens for unresectable colorectal hepatic metastases who were treated with one or two infusions of SIR-Spheres were retrospectively analyzed for demographics, tumor characteristics, treatment details, response, and survival. RESULTS Twelve patients underwent 17 outpatient infusions of SIR-Spheres. Percent hepatic tumor volume was less than 25% in four patients, 25%-50% in three, and more than 50% in five. Treatment in 11 patients with bilobar disease was accomplished via single infusions in six cases and sequential unilobar infusions in five patients. A single infusion was used to treat unilobar disease in the remaining patient. Median prescribed dose was 39.6 mCi (mean, 37.2 mCi; range, 17-67.5 mCi); the prescribed dose exceeded the delivered dose in six infusions (35%) as a result of embolic arterial occlusion. Radiologic response was stable in five of nine patients. Carcinoembryonic antigen levels decreased in four of seven patients. Four patients received chemotherapy concomitantly or after completion of treatment. Gastric ulceration in one patient was managed nonoperatively. Median survival times from diagnosis and treatment were 24.6 and 4.5 months, respectively. CONCLUSIONS Treatment with SIR-Spheres induces responses in patients with advanced unresectable colorectal hepatic metastases after multiple chemotherapy regimens. Inability to deliver the prescribed dose is related to the embolic effect of SIR-Spheres.
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Affiliation(s)
- Ravi Murthy
- Division of Diagnostic Imaging, Department of Gastrointestinal Medical Oncology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Unit 325, Houston, Texas 77030-4009, USA.
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Abstract
CT has always played a major role in the imaging of the liver despite continuous challenge by ultrasound and MR imaging. Introduction of multidetector row CT technology has helped CT to excel in its already established indications and has expanded its capabilities by adding new clinical indications, such as CT angiography or liver perfusion. This article discusses the advantages of multidetector row CT scanners in liver imaging, examines the guidelines to improve image quality by optimizing scanning protocols and contrast administration strategies, and reviews the current and potential clinical applications.
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Affiliation(s)
- Aytekin Oto
- Department of Radiology, University of Texas Medical Branch at Galveston, 2.815 John Sealy Annex, 301 University Boulevard, Galveston, TX 77555, USA.
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Faria SC, Tamm EP, Varavithya V, Phongkitkarun S, Kaur H, Szklaruk J, Dubrow R, Charnsangavej C. Systematic approach to the analysis of cross-sectional imaging for surveillance of recurrent colorectal cancer. Eur J Radiol 2005; 53:387-96. [PMID: 15741012 DOI: 10.1016/j.ejrad.2004.12.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2004] [Revised: 12/14/2004] [Accepted: 12/17/2004] [Indexed: 11/20/2022]
Abstract
Recurrent disease in colorectal cancer occurs in approximately 50% of patients who undergo a "curative" operation. Tumor recurrence may occur locally (at the anastomotic site), in the mesentery or mesocolon adjacent to the post-operative site, in the nodal echelon downstream to the post-operative site, and as distant metastases to the peritoneal cavity, liver or lung. Local recurrence at the anastomosis is frequently diagnosed at follow-up endoscopic examinations as part of screening for metachronous lesions. Other types of recurrences require imaging studies, most frequently CT or MR imaging to diagnose. We developed an approach to analyze imaging obtained after curative resection of colorectal cancer. Our approach is based on the knowledge of patterns of disease spread, of types of surgical procedures and of pathologic staging. Using this approach has the potential to detect recurrent disease at an early stage because the locoregional and nodal spread of this disease is predictable. Early diagnosis of recurrent disease, even in asymptomatic cases, allows for more effective treatment that can improve the long-term survival of these patients.
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Affiliation(s)
- Silvana C Faria
- Department of Diagnostic Radiology, Division of Diagnostic Imaging, University of Texas M.D. Anderson Cancer Center, Department of Diagnostic Radiology, 1515 Holcombe Blvd., Box 57, Houston, TX 77030, USA
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