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Talakić E, Kaufmann-Bühler AK, Igrec J, Adelsmayr G, Janisch M, Döller C, Geyer E, Lackner K, Fuchsjäger M, Schöllnast H. Perfusion Computed Tomography in Rectal Carcinoma: Influence of Optimization of the Patlak Range on Calculation of Equivalent Blood Volume and Flow Extraction. J Comput Assist Tomogr 2023; 47:850-855. [PMID: 37948358 DOI: 10.1097/rct.0000000000001506] [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: 07/29/2023]
Abstract
PURPOSE The aim of the study is to assess the influence of manual adjustment of the Patlak range in computed tomography (CT) perfusion analysis of rectal carcinoma compared with default range of the perfusion software. METHODS This study was approved by the institutional review board and informed consent was obtained. Twenty-one patients (12 male, 9 female; mean age ± SD, 59 ± 11 years) with rectal cancer were included and underwent perfusion CT before preoperative chemoradiotherapy. Equivalent blood volume (BV) and flow-extraction (FE) were calculated using the Patlak plot model. Two perfusion sets were calculated per patient, a perfusion set using the default setting as provided by the software (dBV, dFE) and an optimized perfusion set after manual adaption of the Patlak range (aBV, aFE), which was limited to the intravascular space clearance of contrast to the extravascular space. Perfusion values calculated with both methods were compared for significance in differences using the Wilcoxon test. A P value of 0.05 or less was defined as statistically significant. RESULTS Adjustment of the Patlak range statistically significantly influenced BV and FE calculation. Median dBV was 23.2 mL/100 mL (interquartile range [IQR], 12.1 mL/100 mL), whereas median aBV was 20.3 mL/100 mL (IQR, 10.9 mL/100 mL). The difference in BV was statistically significant ( P = 0.021). Median dFE was 8.3 mL/min/100 mL (IQR, 4.7 mL/min/100 mL), whereas median aFE was 15.4 mL/min/100 mL (IQR, 5.8 mL/min/100 mL). The difference in FE was statistically significant ( P < 0.001). CONCLUSIONS Our findings indicate that in perfusion CT of rectal carcinoma, adjustment of the Patlak range may significantly influence BV and FE compared with default setting of the software. This may contribute to standardization in the use of this technique for functional imaging of rectal cancer.
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Affiliation(s)
- Emina Talakić
- From the Division of General Radiology, Department of Radiology, Medical University of Graz
| | | | - Jasminka Igrec
- From the Division of General Radiology, Department of Radiology, Medical University of Graz
| | - Gabriel Adelsmayr
- From the Division of General Radiology, Department of Radiology, Medical University of Graz
| | - Michael Janisch
- From the Division of General Radiology, Department of Radiology, Medical University of Graz
| | - Carmen Döller
- Department of Therapeutic Radiology and Oncology, Medical University of Graz
| | - Edith Geyer
- Department of Therapeutic Radiology and Oncology, Medical University of Graz
| | - Karoline Lackner
- Diagnostic and Research Institute of Pathology, Medical University of Graz
| | - Michael Fuchsjäger
- From the Division of General Radiology, Department of Radiology, Medical University of Graz
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Stranger N, Kaulfersch C, Mattiassich G, Mandl J, Hausbrandt PA, Szolar D, Schöllnast H, Tillich M. Frequency of anterolateral ligament tears and ramp lesions in patients with anterior cruciate ligament tears and associated injuries indicative for these lesions-a retrospective MRI analysis. Eur Radiol 2023; 33:4833-4841. [PMID: 36806565 PMCID: PMC10290041 DOI: 10.1007/s00330-023-09444-z] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 01/10/2023] [Accepted: 01/18/2023] [Indexed: 02/21/2023]
Abstract
OBJECTIVES To assess the frequency of anterolateral ligament (ALL) tears and ramp lesions (RL) detected with MRI in patients with anterior cruciate ligament (ACL) tears and to describe associated injuries indicative for these lesions. METHODS In this retrospective study, 164 patients with surgically verified ACL tears were included. Preoperative MRI scans were reviewed for ALL tears and different types of RL. All coexisting meniscal tears, tears of the medial (MCL) and lateral collateral band (LCL), and posterior-medial tibial bone marrow edema (BME) were recorded. The frequency of ALL tears and RL was assessed and coexisting injuries were correlated using Pearson's chi-square test. A p < 0.05 was defined as statistically significant. In cases of multiple testing, Bonferroni's correction was applied. RESULTS ALL tears and RL combined were detected in 28 patients (17.1%), ALL tears in 48 patients (29.3%), and RL in 54 patients (32.9%) which were significantly associated to each other. ALL tears were significantly associated with tears of the posterior horn of the lateral meniscus (PHLM), BME, and with tears of the LCL and MCL. RL were significantly associated with tears of the posterior horn of the medial (PHMM) and PHLM, with BME, and with tears of the LCL. CONCLUSIONS ACL tears are associated with RL or ALL tears in about one-third of cases and with both lesions combined in about one-fifth of cases. ALL tears and RL are significantly associated with additional posttraumatic injuries, which can thus be indicative of these lesions. KEY POINTS • ACL tears were associated with ramp lesions or ALL tears in about one-third of the cases. • Ramp lesions and ALL tears were significantly associated with each other, tear in the PHLM, tear in the LCL, and BME. • ALL tears were more frequently associated with instable classified ramp lesion type 4b and type 5.
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Affiliation(s)
- Nikolaus Stranger
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Christian Kaulfersch
- Department of Trauma Surgery, Klinik Diakonissen Schladming, Schladming, Austria
| | - Georg Mattiassich
- Department of Trauma Surgery, Klinik Diakonissen Schladming, Schladming, Austria
| | | | | | | | - Helmut Schöllnast
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria.
- Institute of Radiology, LKH Graz II, Göstinger Strasse 22, 8020, Graz, Austria.
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Adelsmayr G, Janisch M, Müller H, Holzinger A, Talakic E, Janek E, Streit S, Fuchsjäger M, Schöllnast H. Three dimensional computed tomography texture analysis of pulmonary lesions: Does radiomics allow differentiation between carcinoma, neuroendocrine tumor and organizing pneumonia? Eur J Radiol 2023; 165:110931. [PMID: 37399666 DOI: 10.1016/j.ejrad.2023.110931] [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: 02/01/2023] [Revised: 05/22/2023] [Accepted: 06/15/2023] [Indexed: 07/05/2023]
Abstract
PURPOSE To investigate whether CT texture analysis allows differentiation between adenocarcinomas, squamous cell carcinomas, carcinoids, small cell lung cancers and organizing pneumonia and between carcinomas and neuroendocrine tumors. METHOD This retrospective study included patients 133 patients (30 patients with organizing pneumonia, 30 patients with adenocarcinoma, 30 patients with squamous cell carcinoma, 23 patients with small cell lung cancer, 20 patients with carcinoid), who underwent CT-guided biopsy of the lung and had a corresponding histopathologic diagnosis. Pulmonary lesions were segmented in consensus by two radiologists with and without a threshold of -50HU in three dimensions. Groupwise comparisons were performed to assess for differences between all five above-listed entities and between carcinomas and neuroendocrine tumors. RESULTS Pairwise comparisons of the five entities revealed 53 statistically significant texture features when using no HU-threshold and 6 statistically significant features with a threshold of -50HU. The largest AUC (0.818 [95%CI 0.706-0.930]) was found for the feature wavelet-HHH_glszm_SmallAreaEmphasis for discrimination of carcinoid from the other entities when using no HU-threshold. In differentiating neuroendocrine tumors from carcinomas, 173 parameters proved statistically significant when using no HU threshold versus 52 parameters when using a -50HU-threshold. The largest AUC (0.810 [95%CI 0.728-0,893]) was found for the parameter original_glcm_Correlation for discrimination of neuroendocrine tumors from carcinomas when using no HU-threshold. CONCLUSIONS CT texture analysis revealed features that differed significantly between malignant pulmonary lesions and organizing pneumonia and between carcinomas and neuroendocrine tumors of the lung. Applying a HU-threshold for segmentation substantially influenced the results of texture analysis.
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Affiliation(s)
- Gabriel Adelsmayr
- Division of General Radiology, Department of Radiology, Medical University of Graz, Auenbruggerplatz 9, 8036 Graz, Austria
| | - Michael Janisch
- Division of General Radiology, Department of Radiology, Medical University of Graz, Auenbruggerplatz 9, 8036 Graz, Austria
| | - Heimo Müller
- Diagnostic and Research Center for Molecular BioMedicine, Diagnostic and Research Institute of Pathology, Medical University of Graz, Neue Stiftingtalstrasse 6, 8010 Graz, Austria
| | - Andreas Holzinger
- Institute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Auenbruggerplatz 2/9/V, 8036 Graz, Austria
| | - Emina Talakic
- Division of General Radiology, Department of Radiology, Medical University of Graz, Auenbruggerplatz 9, 8036 Graz, Austria
| | - Elmar Janek
- Division of General Radiology, Department of Radiology, Medical University of Graz, Auenbruggerplatz 9, 8036 Graz, Austria
| | - Simon Streit
- Diagnostic and Research Center for Molecular BioMedicine, Diagnostic and Research Institute of Pathology, Medical University of Graz, Neue Stiftingtalstrasse 6, 8010 Graz, Austria
| | - Michael Fuchsjäger
- Division of General Radiology, Department of Radiology, Medical University of Graz, Auenbruggerplatz 9, 8036 Graz, Austria.
| | - Helmut Schöllnast
- Division of General Radiology, Department of Radiology, Medical University of Graz, Auenbruggerplatz 9, 8036 Graz, Austria; Institute of Radiology, LKH Graz II, Göstinger Strasse 22, 8020 Graz, Austria
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Talakić E, Schöllnast H, Kaufmann-Bühler AK, Hohenberg F, Mijović K, Nagy E, Fuchsjäger M, Tschauner S. The "cardiac neglect": a gentle reminder to radiologists interpreting contrast-enhanced abdominal MDCT. Front Cardiovasc Med 2023; 10:1147166. [PMID: 37180771 PMCID: PMC10167052 DOI: 10.3389/fcvm.2023.1147166] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 03/24/2023] [Indexed: 05/16/2023] Open
Abstract
Myocardial infarction (MI) may be visible on contrast-enhanced multidetector computed tomography (MDCT) scans of the abdomen. In the previous literature, potentially missed MI in abdominal MDCTs was not perceived as an issue in radiology. This retrospective single-center study assessed the frequency of detectable myocardial hypoperfusion in contrast-enhanced abdominal MDCTs. We identified 107 patients between 2006 and 2022 who had abdominal MDCTs on the same day or the day before a catheter-proven or clinically evident diagnosis of MI. After reviewing the digital patient records and applying the exclusion criteria, we included 38 patients, with 19 showing areas of myocardial hypoperfusion. All MDCT studies were non ECG-gated. The delay between the MDCT examination and MI diagnosis was shorter in studies with myocardial hypoperfusion (7.4 ± 6.5 hours and 13.8 ± 12.5 hours) but not statistically significant p = 0.054 . Only 2 of 19 (11%) of these pathologies had been noted in the written radiology reports. The most common cardinal symptom was epigastric pain (50%), followed by polytrauma (21%). STEMI was significantly more common in cases of myocardial hypoperfusion p = 0.009 . Overall, 16 of 38 (42%) patients died because of acute MI. Based on extrapolations using local MDCT rates, we estimate several thousand radiologically missed MI cases worldwide per year.
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Affiliation(s)
- Emina Talakić
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Helmut Schöllnast
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
- Institute of Radiology, LKH Graz II, Graz, Austria
| | | | - Florian Hohenberg
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Ksenija Mijović
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
- Emergency Radiology Department, Center for Radiology and MRI, University Clinical Center of Serbia, Belgrade, Serbia
| | - Eszter Nagy
- Division of Paediatric Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Michael Fuchsjäger
- Division of Paediatric Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Sebastian Tschauner
- Division of Paediatric Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
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Adelsmayr G, Janisch M, Kaufmann-Bühler AK, Holter M, Talakic E, Janek E, Holzinger A, Fuchsjäger M, Schöllnast H. CT texture analysis reliability in pulmonary lesions: the influence of 3D vs. 2D lesion segmentation and volume definition by a Hounsfield-unit threshold. Eur Radiol 2023; 33:3064-3071. [PMID: 36947188 PMCID: PMC10121537 DOI: 10.1007/s00330-023-09500-8] [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: 07/07/2022] [Revised: 11/14/2022] [Accepted: 01/25/2023] [Indexed: 03/23/2023]
Abstract
OBJECTIVE Reproducibility problems are a known limitation of radiomics. The segmentation of the target lesion plays a critical role in texture analysis variability. This study's aim was to compare the interobserver reliability of manual 2D vs. 3D lung lesion segmentation with and without pre-definition of the volume using a threshold of - 50 HU. METHODS Seventy-five patients with histopathologically proven lung lesions (15 patients each with adenocarcinoma, squamous cell carcinoma, small cell lung cancer, carcinoid, and organizing pneumonia) who underwent an unenhanced CT scan of the chest were included. Three radiologists independently segmented each lesion manually in 3D and 2D with and without pre-segmentation volume definition by a HU threshold, and shape parameters and original, Laplacian of Gaussian-filtered, and wavelet-based texture features were derived. To assess interobserver reliability and identify the most robust texture features, intraclass correlation coefficients (ICCs) for different segmentation settings were calculated. RESULTS Shape parameters had high reliability (64-79% had excellent and good ICCs). Texture features had weak reliability levels, with the highest ICCs (38% excellent or good) found for original features in 3D segmentation without the use of a HU threshold. A small proportion (4.3-11.5%) of texture features had excellent or good ICC values at all segmentation settings. CONCLUSION Interobserver reliability of texture features from CT scans of a heterogeneous collection of manually segmented lung lesions was low with a small proportion of features demonstrating high reliability independent of the segmentation settings. These results indicate a limited applicability of texture analysis and the need to define robust texture features in patients with lung lesions. KEY POINTS • Our study showed a low reproducibility of texture features when 3 radiologists independently segmented lung lesions in CT images, which highlights a serious limitation of texture analysis. • Interobserver reliability of texture features was low regardless of whether the lesion was segmented in 2D and 3D with or without a HU threshold. • In contrast to texture features, shape parameters showed a high interobserver reliability when lesions were segmented in 2D vs. 3D with and without a HU threshold of - 50.
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Affiliation(s)
- Gabriel Adelsmayr
- Division of General Radiology, Department of Radiology, Medical University of Graz, Auenbruggerplatz 9, 8036, Graz, Austria
| | - Michael Janisch
- Division of General Radiology, Department of Radiology, Medical University of Graz, Auenbruggerplatz 9, 8036, Graz, Austria
| | - Ann-Katrin Kaufmann-Bühler
- Division of General Radiology, Department of Radiology, Medical University of Graz, Auenbruggerplatz 9, 8036, Graz, Austria
| | - Magdalena Holter
- Institute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Auenbruggerplatz 2/9/V, 8036, Graz, Austria
| | - Emina Talakic
- Division of General Radiology, Department of Radiology, Medical University of Graz, Auenbruggerplatz 9, 8036, Graz, Austria
| | - Elmar Janek
- Division of General Radiology, Department of Radiology, Medical University of Graz, Auenbruggerplatz 9, 8036, Graz, Austria
| | - Andreas Holzinger
- Institute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Auenbruggerplatz 2/9/V, 8036, Graz, Austria
| | - Michael Fuchsjäger
- Division of General Radiology, Department of Radiology, Medical University of Graz, Auenbruggerplatz 9, 8036, Graz, Austria.
| | - Helmut Schöllnast
- Division of General Radiology, Department of Radiology, Medical University of Graz, Auenbruggerplatz 9, 8036, Graz, Austria
- Institute of Radiology, LKH Graz II, Göstinger Strasse 22, 8020, Graz, Austria
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Talakic E, Kaufmann-Bühler AK, Janek E, Mrak P, Fuchsjäger M, Schöllnast H. Case report: Acute transverse myelitis in COVID-19 infection with delayed onset of pulmonary manifestation. ROFO-FORTSCHR RONTG 2023; 195:150-152. [PMID: 36252573 PMCID: PMC9891804 DOI: 10.1055/a-1949-7549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Emina Talakic
- Division of General Radiology, Department of Radiology, Medical University of Graz (MUG), Graz, Austria
| | | | - Elmar Janek
- Division of General Radiology, Department of Radiology, Medical University of Graz (MUG), Graz, Austria
| | - Peter Mrak
- Department of Internal Medicine II, LKH Weststeiermark, Voitsberg, Austria
| | - Michael Fuchsjäger
- Division of General Radiology, Department of Radiology, Medical University of Graz (MUG), Graz, Austria
| | - Helmut Schöllnast
- Division of General Radiology, Department of Radiology, Medical University of Graz (MUG), Graz, Austria.,Institute of Radiology, LKH Graz II, Graz, Austria
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Mischinger J, Schöllnast H, Zurl H, Geyer M, Fischereder K, Adelsmayr G, Igrec J, Fritz G, Merdzo-Hörmann M, Elstner J, Schmid J, Triebl A, Trimmel V, Reiter C, Steiner J, Rosenlechner D, Seles M, Pichler GP, Pichler M, Riedl J, Schöpfer-Schwab S, Strobl J, Hutterer GC, Zigeuner R, Pummer K, Augustin H, Ahyai S, Mannweiler S, Fuchsjäger M, Talakic E. Combining targeted and systematic prostate biopsy improves prostate cancer detection and correlation with the whole mount histopathology in biopsy naïve and previous negative biopsy patients. Front Surg 2022; 9:1013389. [PMID: 36277287 PMCID: PMC9582510 DOI: 10.3389/fsurg.2022.1013389] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 09/20/2022] [Indexed: 11/13/2022] Open
Abstract
Objective Guidelines for previous negative biopsy (PNB) cohorts with a suspicion of prostate cancer (PCa) after positive multiparametric (mp) magnetic-resonance-imaging (MRI) often favour the fusion-guided targeted prostate-biopsy (TB) only approach for Prostate Imaging-Reporting and Data System (PI-RADS) ≥3 lesions. However, recommendations lack direct biopsy performance comparison within biopsy naïve (BN) vs. PNB patients and its prognostication of the whole mount pathology report (WMPR), respectively. We suppose, that the combination of TB and concomitant TRUS-systematic biopsy (SB) improves the PCa detection rate of PI-RADS 2, 3, 4 or 5 lesions and the International Society of Urological Pathology (ISUP)-grade predictability of the WMPR in BN- and PNB patients. Methods Patients with suspicious mpMRI, elevated prostate-specific-antigen and/or abnormal digital rectal examination were included. All PI-RADS reports were intramurally reviewed for biopsy planning. We compared the PI-RADS score substratified TB, SB or combined approach (TB/SB) associated BN- and PNB-PCa detection rate. Furthermore, we assessed the ISUP-grade variability between biopsy cores and the WMPR. Results According to BN (n = 499) vs. PNB (n = 314) patients, clinically significant (cs) PCa was detected more frequently by the TB/SB approach (62 vs. 43%) than with the TB (54 vs. 34%) or SB (57 vs. 34%) (all p < 0.0001) alone. Furthermore, we observed that the TB/SB strategy detects a significantly higher number of csPCa within PI-RADS 3, 4 or 5 reports, both in BN and PNB men. In contrast, applied biopsy techniques were equally effective to detect csPCa within PI-RADS 2 lesions. In case of csPCa diagnosis the TB approach was more often false-negative in PNB patients (BN 11% vs. PNB 19%; p = 0.02). The TB/SB technique showed in general significantly less upgrading, whereas a higher agreement was only observed for the total and BN patient cohort. Conclusion Despite csPCa is more frequently found in BN patients, the TB/SB method always detected a significantly higher number of csPCa within PI-RADS 3, 4 or 5 reports of our BN and PNB group. The TB/SB strategy predicts the ISUP-grade best in the total and BN cohort and in general shows the lowest upgrading rates, emphasizing its value not only in BN but also PNB patients.
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Affiliation(s)
| | | | - Hanna Zurl
- Department of Urology, Medical University of Graz, Graz, Austria
| | - Mark Geyer
- Department of Urology, Medical University of Graz, Graz, Austria
| | | | | | - Jasminka Igrec
- Department of Radiology, Medical University of Graz, Graz, Austria
| | - Gerald Fritz
- Department of Radiology, Medical University of Graz, Graz, Austria
| | | | - Jörg Elstner
- Department of Radiology, Medical University of Graz, Graz, Austria
| | - Johannes Schmid
- Department of Radiology, Medical University of Graz, Graz, Austria
| | - Alfred Triebl
- Department of Radiology, Medical University of Graz, Graz, Austria
| | - Viktoria Trimmel
- Department of Radiology, Medical University of Graz, Graz, Austria
| | - Clemens Reiter
- Department of Radiology, Medical University of Graz, Graz, Austria
| | - Jakob Steiner
- Department of Radiology, Medical University of Graz, Graz, Austria
| | | | - Maximilian Seles
- Department of Urology, Medical University of Graz, Graz, Austria
| | - Georg P. Pichler
- Department of Urology, Medical University of Graz, Graz, Austria
| | - Martin Pichler
- Department of Oncology, Medical University of Graz, Graz, Austria
| | - Jakob Riedl
- Department of Oncology, Medical University of Graz, Graz, Austria
| | | | - Jakob Strobl
- Department of Urology, Medical University of Graz, Graz, Austria
| | - Georg C. Hutterer
- Department of Urology, Medical University of Graz, Graz, Austria,Correspondence: Georg C. Hutterer
| | - Richard Zigeuner
- Department of Urology, Medical University of Graz, Graz, Austria
| | - Karl Pummer
- Department of Urology, Medical University of Graz, Graz, Austria
| | - Herbert Augustin
- Department of Urology, Medical University of Graz, Graz, Austria
| | - Sascha Ahyai
- Department of Urology, Medical University of Graz, Graz, Austria
| | | | | | - Emina Talakic
- Department of Radiology, Medical University of Graz, Graz, Austria
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Kaufmann-Bühler AK, Schöllnast H, Igrec J. [Melorheostosis - a benign entity mimicking malignant bone tumor in young adults]. ROFO-FORTSCHR RONTG 2021; 194:416-419. [PMID: 34933351 PMCID: PMC8959910 DOI: 10.1055/a-1656-9987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
| | | | - Jasminka Igrec
- Division of General Radiology, Medical University of Graz, Austria
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Mischinger J, Schöllnast H, Zurl H, Geyer M, Fischereder K, Adelsmayr G, Igrec J, Fritz G, Merdzo-Hörmann M, Elster J, Schmid J, Triebl A, Trimmel V, Rosenlechner D, Seles M, Pichler G, Schöpfer-Schwab S, Strobl J, Hutterer G, Zigeuner R, Pummer K, Augustin H, Mannweiler S, Fuchsjäger M, Talakic E. Real-world evidence for interobserver-agreement of PI-RADS-version-2 and the value of combining 4-core-targeted-MRI-TRUS-fusion and systematic-12-core-TRUS prostate biopsy for the diagnosis of prostate cancer according to biopsy-history. EUR UROL SUPPL 2021. [DOI: 10.1016/s2666-1683(21)03109-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Janek E, Edl D, Taflinski A, Talakic E, Adelsmayr G, Janisch M, Igrec J, Quehenberger F, Fuchsjäger M, Schöllnast H. Contrast media dose adjustment to allometric parameters of body mass in multiphasic CT of the liver: A comparison of different metrics. Eur J Radiol 2021; 141:109778. [PMID: 34174486 DOI: 10.1016/j.ejrad.2021.109778] [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: 04/16/2021] [Revised: 05/13/2021] [Accepted: 05/16/2021] [Indexed: 11/15/2022]
Abstract
PURPOSE To assess correlations of lean body weight (LBW) calculated with various formulas, total body weight (TBW), body height (BH), body mass index (BMI), body surface area (BSA) and fat-free mass (FFM) with vascular and parenchymal enhancement in multiphasic CT of the liver. METHOD Thirty consecutive patients underwent multiphasic CT of the liver using constant iodine dose and flow rate. Contrast enhancement of aorta, portal vein and liver was calculated by measuring mean vascular and parenchymal attenuation in pre-contrast and post-contrast phases. Correlations of TBW, BH, BMI, BSA, FFM, and LBW (calculated with formulas of Boer, Hume, James and Green&Duffull) with enhancement were tested using Spearman's correlation coefficient. The method of Fieller et al. was used to calculate 95 % confidence intervals. A p-value ≤ 0.05 was considered statistically significant. RESULTS Aortal enhancement correlated strongly with TBW, BSA, LBWBoer and LBWHume and moderately with BH, BMI, FFM, LBWJames and LBWGreen&Duffull. Liver enhancement in the late arterial phase correlated moderately with TBW, FFM, LBWBoer, LBWHume and LBWGreen&Duffull and weakly with BSA. Liver enhancement in the portal venous phase correlated strongly with TBW, BSA, FFM, LBWBoer, LBWHume and LBWGreen&Duffull, whereby overlap of the 95 % CI graphs demonstrated that the differences in the correlation coefficients were not statistically significant. Liver enhancement in the delayed phase correlated moderately with BH but did not correlate significantly with any other parameter. CONCLUSION Regardless of the form used for calculation, LBW did not correlate statistically significantly stronger than TBW with vascular or parenchymal enhancement of the liver.
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Affiliation(s)
- Elmar Janek
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Dominik Edl
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Adrian Taflinski
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Emina Talakic
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Gabriel Adelsmayr
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Michael Janisch
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Jasminka Igrec
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - Franz Quehenberger
- Institute of Medical Informatics, Statistics and Documentation, Medical University of Graz, Graz, Austria
| | - Michael Fuchsjäger
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria.
| | - Helmut Schöllnast
- Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria; Institute of Radiology, LKH Graz II, Graz, Austria
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Vujic J, Schöllnast H, Marsoner K, Wienerroither V, Bacher H, Mischinger HJ, Kornprat P. Marking Disappearing Colorectal Liver Metastases After Complete Response to Neoadjuvant Chemotherapy via CT - A Pilot Study. Anticancer Res 2019; 39:3847-3854. [PMID: 31262912 DOI: 10.21873/anticanres.13534] [Citation(s) in RCA: 4] [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: 04/19/2019] [Revised: 05/30/2019] [Accepted: 06/04/2019] [Indexed: 01/15/2023]
Abstract
BACKGROUND/AIM The liver is a frequent site for metastases of colorectal cancer. Approximately 15% of patients have hepatic metastases at the time of diagnosis and another 50% develop them over the course of their disease. Only 10-25% of patients are candidates for liver resection. The aim of this study was to assess the benefit of preoperative computed tomography (CT)-guided wire marking of disappearing colorectal liver metastases (CRLMs) (radiological disappearance of metastases) before surgical resection. PATIENTS AND METHODS Between January 2011 and January 2014, 20 patients with potentially disappearing CRLMs were selected for CT-guided wire marking. Following treatment with neoadjuvant chemotherapy, disappearing CRLMs were marked via CT guidance. Afterwards, the marked sites were resected. RESULTS Complete histological response to neoadjuvant chemotherapy was only in 10 resected sites (18%), and 46 (82%) resected liver metastases showed metastatic tissue present. Both overall survival and the disease-free rates in patients after using our method were 55%. CONCLUSION This study demonstrated the usefulness of CT-guided wire marking to mark disappearing CRLMs in order to improve long-term effectiveness of surgical treatment.
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Affiliation(s)
- Jovan Vujic
- Division of General Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
| | | | - Katharina Marsoner
- Division of General Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
| | - Valerie Wienerroither
- Division of General Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
| | - Heinz Bacher
- Division of General Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
| | - Hans-Jörg Mischinger
- Division of General Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
| | - Peter Kornprat
- Division of General Surgery, Department of Surgery, Medical University of Graz, Graz, Austria
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Schöllnast H. Radiologische Charakterisierung chronisch-entzündlicher Darmerkrankungen. Radiologe 2018; 58:312-319. [DOI: 10.1007/s00117-018-0372-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Aigner B, Kornprat P, Schöllnast H, Kasparek AK, Mischinger HJ, Haybaeck J. A Case of Focal Small-cell Neuroendocrine Carcinoma in the Vicinity of the Extrahepatic Bile Duct, Adjacent to an Extensive Biliary Intraepithelial Neoplasm: A Diagnostic Challenge with Major Clinical Implications. Anticancer Res 2015; 35:4821-4828. [PMID: 26254373] [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] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Gastroenteropancreatic neuroendocrine tumors are known for their aggressiveness. Diagnosis of various bile duct pathologies, like biliar intraepithelial neoplasm, mixed adenoneuroendocrine carcinomas or small cell carcinomas, is challenging. This case report focuses on a rare case of a focal primary minute small cell carcinoma in the vicinity of the extrahepatic bile duct, presenting itself next to an extensive biliar intraepithelial neoplasm. This finding led to adjuvant chemotherapy, followed by major surgery. Therapeutic approach was based on CT and MRI scans but most importantly on immunohistochemistry and histological evaluation. Initially CR seemed achievable, but metastases were to be found rapidly. The authors want to underline the fact that major clinical decisions are based on sometimes tiny specimens; as literature shows it is absolutely advisable to use markers to differentiate the dignity of investigated areas. The authors call for keeping collision of tumors in mind and adding KOC staining and using it in a routine manner examining biliary duct lesions.
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Affiliation(s)
- Birgit Aigner
- Department of Dermatology and Venerology, Medical University of Graz, Graz, Austria Department of Surgery, Division of Visceral Surgery, Medical University of Graz, Graz, Austria
| | - Peter Kornprat
- Department of Surgery, Division of Visceral Surgery, Medical University of Graz, Graz, Austria
| | | | | | - Hans-Jörg Mischinger
- Department of Surgery, Division of Visceral Surgery, Medical University of Graz, Graz, Austria
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Kalmar PI, Quehenberger F, Steiner J, Lutfi A, Bohlsen D, Talakic E, Hassler EM, Schöllnast H. The impact of iterative reconstruction on image quality and radiation dose in thoracic and abdominal CT. Eur J Radiol 2014; 83:1416-20. [DOI: 10.1016/j.ejrad.2014.05.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 05/07/2014] [Accepted: 05/08/2014] [Indexed: 11/25/2022]
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15
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Schöllnast H. Die Rolle der funktionellen Bildgebung: Herausforderung für die Zukunft. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Talakic E, Steiner J, Kalmar P, Lutfi A, Quehenberger F, Reiter U, Fuchsjäger M, Schöllnast H. Gd-EOB-DTPA enhanced MRI of the liver: Correlation of relative hepatic enhancement, relative renal enhancement, and liver to kidneys enhancement ratio with serum hepatic enzyme levels and eGFR. Eur J Radiol 2014; 83:607-11. [DOI: 10.1016/j.ejrad.2013.12.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 11/04/2013] [Accepted: 12/06/2013] [Indexed: 12/22/2022]
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17
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Talakic E, Wimmer T, Steiner J, Quehenberger F, Reiter U, Fuchsjäger M, Schöllnast H. GD-EOB-DTPA verstärkte MRT der Leber: Korrelation der relativen Kontrastmittelaufnahme der Leber und der Nieren sowie des Verhältnisses der Kontrastmittelaufnahme der Leber und der Nieren mit den Leberenzymen im Serum. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1353256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Reiter G, Reiter U, Wagner T, Kozma N, Roland J, Schöllnast H, Ebner F, Lanzer G. Thermometry of red blood cell concentrate: magnetic resonance decoding warm up process. PLoS One 2013; 8:e57931. [PMID: 23469108 PMCID: PMC3585280 DOI: 10.1371/journal.pone.0057931] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 01/29/2013] [Indexed: 11/19/2022] Open
Abstract
PURPOSE Temperature is a key measure in human red blood cell concentrate (RBC) quality control. A precise description of transient temperature distributions in RBC units removed from steady storage exposed to ambient temperature is at present unknown. Magnetic resonance thermometry was employed to visualize and analyse RBC warm up processes, to describe time courses of RBC mean, surface and core temperatures by an analytical model, and to determine and investigate corresponding model parameters. METHODS Warm-up processes of 47 RBC units stored at 1-6°C and exposed to 21.25°C ambient temperature were investigated by proton resonance frequency thermometry. Temperature distributions were visualized and analysed with dedicated software allowing derivation of RBC mean, surface and core temperature-time courses during warm up. Time-dependence of mean temperature was assumed to fulfil a lumped capacitive model of heat transfer. Time courses of relative surface and core temperature changes to ambient temperature were similarly assumed to follow shifted exponential decays characterized by a time constant and a relative time shift, respectively. RESULTS The lumped capacitive model of heat transfer and shifted exponential decays described time-dependence of mean, surface and core temperatures close to perfect (mean R(2) were 0.999±0.001, 0.996±0.004 and 0.998±0.002, respectively). Mean time constants were τmean = 55.3±3.7 min, τsurface = 41.4±2.9 min and τcore = 76.8±7.1 min, mean relative time shifts were Δsurface = 0.07±0.02 and Δcore = 0.04±0.01. None of the constants correlated significantly with temperature differences between ambient and storage temperature. CONCLUSION Lumped capacitive model of heat transfer and shifted exponential decays represent simple analytical formulas to describe transient mean, surface and core temperatures of RBC during warm up, which might be a helpful tool in RBC temperature monitoring and quality control. Independence of constants on differences between ambient and storage temperature suggests validity of models for arbitrary storage and ambient temperatures.
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Affiliation(s)
- Gert Reiter
- Healthcare Sector, Siemens AG, Graz, Austria.
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Kalmar PI, Talakic E, Schöllnast H. [Bronchial fibrovascular polyp in an 18-year-old patient]. ROFO-FORTSCHR RONTG 2012; 184:1056-8. [PMID: 22851299 DOI: 10.1055/s-0032-1313036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- P I Kalmar
- Radiologie, LKH Univ.-Kinikum Graz, Auenbruggerplatz 9A, 8036 Graz, Austria.
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Reiter U, Reiter G, Wagner T, Kozma N, Roland J, Schöllnast H, Ebner F, Lanzer G. Four-dimensional temperature distributions in red blood cells withdrawn from storage and exposed to ambient temperature: a magnetic resonance thermometry study. Transfusion 2012; 53:167-73. [DOI: 10.1111/j.1537-2995.2012.03798.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Schneider NI, Bauernhofer T, Schöllnast H, Ott A, Langner C. Pancreatic adenocarcinoma with multiple eosinophilic extracellular deposits consistent with noncalcified psammoma bodies. Virchows Arch 2011; 459:623-5. [PMID: 22037658 DOI: 10.1007/s00428-011-1159-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Accepted: 10/12/2011] [Indexed: 11/29/2022]
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22
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Wehrschuetz M, Schöllnast H, Wehrschuetz E, Renner W, Luschin G. VEGF 936C > T Polymorphism and Association of BI-RADS Score in Women with Suspected Breast Cancer. Breast Cancer (Auckl) 2009; 3:77-81. [PMID: 21556250 PMCID: PMC3086306 DOI: 10.4137/bcbcr.s3164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Purpose: Vascular endothelial growth factor (VEGF) is a potent regulator of angiogenesis and thereby involved in the development and progression of solid tumors. A 936C > T polymorphism in the VEGF gene has been associated with reduced VEGF plasma levels. Purpose of the present study was to analyze the potential association between VEGF genotype and radiological appearance of breast lesions by mammography. Materials and Methods: Fifty two women with 54 suspected breast lesions were analyzed by the use of mammography with the standard breast imaging reporting and data systems (BI-RADS). Germline VEGF genotype was determined in all subjects by allele-specific digestion of amplification products. An open biopsy was performed on all lesions. Results: VEGF CC, CT and TT genotypes were found in 41 (79%), 9 (17%) and 2 (4%) patients. By mammography 26, 16 and 12 suspected breast lesions were classified as BI-RADS scores 3, 4 and 5, respectively. Both carriers of the TT genotype were classified as BI-RADS 5, whereas among CT or CC carriers, BI-RADS scores 3, 4 and 5 were found in 26, 16 and 10 subjects (P < 0.026). Conclusion: The VEGF 936C > T polymorphism seems to be associated with a high BI-RADS score in women with suspicious breast lesions.
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Affiliation(s)
- M Wehrschuetz
- Department of Radiology, Medical University Graz, Graz, Austria
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Kornprat P, Schöllnast H, Cerwenka H, Werkgartner G, Bernhardt G, Mischinger HJ. Management of colorectal liver metastases after complete response to neoadjuvant chemotherapy. A case of computertomography-guided wire marking of the liver tumor. Int J Colorectal Dis 2009; 24:125-6. [PMID: 18682963 DOI: 10.1007/s00384-008-0548-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/16/2008] [Indexed: 02/04/2023]
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Thalhammer M, Altziebler S, Karlo C, Schöllnast H, Uribe G, Lackner C, Langner C, Mischinger H. 88 POSTER Metastases to the pancreas from renal cell carcinoma. Eur J Surg Oncol 2006. [DOI: 10.1016/s0748-7983(06)70523-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Fritz GA, Schöllnast H, Deutschmann H, Quehenberger F, Schedlbauer P, Tillich M. Mehrzeiler-Computertomographie in der Detektion und im Staging von Urothelkarzinomen des oberen Harnraktes. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-940548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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26
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Fritz GA, Schöllnast H, Deutschmann H, Thimary F, Stessel U, Portugaller HR. Perkutane CT-geleitete Radiofrequenzablation von Nierentumoren. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-941094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Riccabona M, Fritz GA, Schöllnast H, Schwarz T, Deutschmann MJ, Mache CJ. Hydronephrotic kidney: pediatric three-dimensional US for relative renal size assessment--initial experience. Radiology 2005; 236:276-83. [PMID: 15955855 DOI: 10.1148/radiol.2361040158] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [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: 11/11/2022]
Abstract
PURPOSE To prospectively evaluate accuracy of three-dimensional (3D) ultrasonography (US) for assessment of relative renal size in infants and children with hydronephrosis. MATERIALS AND METHODS Informed consent was obtained from parents and also from children who were older than 8 years. Study was approved by ethics committee. Two-dimensional (2D) US, 3D US, and scintigraphy were performed in 40 patients with hydronephrosis (age range, neonate to 16 years; seven girls, 33 boys) without acute renal disease. Twenty patients also underwent magnetic resonance (MR) urography. US and MR urography were performed by one experienced pediatric radiologist; 3D US and MR urographic volume calculations were performed by specifically trained radiologists. Three-dimensional US was performed with integrated 3D volume probes or external system based on electromagnetic positioning devices. At 2D US, kidney volume was calculated with application of ellipsoid equation. At MR urography and 3D US, real renal parenchymal volume was calculated with subtraction of dilated collecting system. Split renal function was assessed with static renal scintigraphy. Three-dimensional US results were graded with respect to image quality and compared with results of 2D US, scintigraphy, and MR urography by using mean difference percentage and standard deviation of the difference. All investigations were performed with blinding. Inter- and intraobserver variability were calculated with coefficient of variation. RESULTS In 76 of 80 kidneys, 3D US image of diagnostic quality was obtained. Three-dimensional US volume measurements compared well with MR urographic measurements (mean difference, -2.5% +/- 7.8 [standard deviation] vs 25.8% +/- 32.2 for 2D US) and with scintigraphically assessed split renal function (mean difference, 1.2% +/- 9.2 vs 15.9% +/- 43.8 for 2D US). Intra- and interobserver variability were +/-6.4% and +/-9.9%, respectively. CONCLUSION Initial experience with renal 3D US indicates that it is an accurate method for assessment of renal parenchymal volume and relative renal size, provided there is no acute renal disease.
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Affiliation(s)
- Michael Riccabona
- Department of Radiology, Division of Pediatric Radiology, University Hospital Graz, Auenbruggerplatz 9, A-8036 Graz, Austria.
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Schöllnast H, Deutschmann HA, Fritz GA, Stessel U, Schaffler GJ, Tillich M. Mehrdetektoren CT-Angiographie der Pulmonalarterien: Einfluss des Jodflusses auf die Kontrastierung und die Detektierbarkeit. ROFO-FORTSCHR RONTG 2005. [DOI: 10.1055/s-2005-867498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Fritz GA, Stessel U, Deutschmann H, Schöllnast H, Machan L, Sieder K, Ruppert-Kohlmayr AJ. Sonographische Charakterisierung fokaler Nierenläsionen mit Echosignalverstärkern der II. Generation. ROFO-FORTSCHR RONTG 2004. [DOI: 10.1055/s-2004-827994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Stessel U, Schöllnast H, Reittner P, Ruppert-Kohlmayr A, Tillich M, Fritz G, Deutschmann H, Brunegger E. Standardisiertes MSCT Traumaprotokoll – Vorteile in der Diagnostik von Thoraxverletzungen beim polytraumatisierten Patienten. ROFO-FORTSCHR RONTG 2004. [DOI: 10.1055/s-2004-828143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Deutschmann H, Aschauer M, Stollberger R, Hausegger KA, Obernosterer A, Schöllnast H, Ebner F. Diagnostische Wertigkeit eines Blood-Pool Kontrastmittels in der MR Venographie des Beckens und der unteren Extremitäten: Erste Ergebnisse bei 12 Patienten. ROFO-FORTSCHR RONTG 2004. [DOI: 10.1055/s-2004-827587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Stessel U, Reittner P, Deutschmann H, Schöllnast H, Fritz G, Ruppert-Kohlmayr A, Kau W, Brunegger E. Standardisierte MSCT Untersuchung beim polytraumatisierten Patienten zur Detektion von Wirbelsäulenverletzungen. ROFO-FORTSCHR RONTG 2004. [DOI: 10.1055/s-2004-828179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Fritz GA, Tillich M, Schöllnast H, Stessel U, Maier C, Ruppert-Kohlmayr A. Rolle der Multidetektor-Computertomographie (MDCT) in der Diagnostik und im Staging von Urothelcarcinomen. ROFO-FORTSCHR RONTG 2004. [DOI: 10.1055/s-2004-828215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Stessel U, Tillich M, Reittner P, Schöllnast H, Ruppert-Kohlmayr A, Fritz G, Deutschmann H, Kau W. MSCT Detection of active arterial contrast extravasation after blunt abdominal trauma in polytraumatized patients. ROFO-FORTSCHR RONTG 2004. [DOI: 10.1055/s-2004-828030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Schöllnast H, Sorantin E, Deutschmann MJ, Fritz GA, Deutschmann HA, Hausegger KA. Einfluss von CT-Gerät und Untersucher auf Volumsmessungen: Eine Phantomstudie in Bezug auf die Anwendung in der CT-Angiographie Kontrolle von abdominalen Aortenaneurysmen nach endovaskulärer Therapie. ROFO-FORTSCHR RONTG 2004. [DOI: 10.1055/s-2004-828008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Deutschmann H, Brodmann M, Schöllnast H, Seinost G, Tiessenhausen K, Preidler KW, Pilger E, Szolar DH. Periphere arterielle Verschlusskrankheit: Vergleich der kontrastverstärkten 3D Magnetresonanzangiographie mittels Panoramatisch mit der konventionellen digitalen Subtraktionsangiographie. ROFO-FORTSCHR RONTG 2004. [DOI: 10.1055/s-2004-827543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Aschauer M, Deutschmann HA, Stollberger R, Hausegger KA, Obernosterer A, Schöllnast H, Ebner F. Value of a blood pool contrast agent in MR venography of the lower extremities and pelvis: Preliminary results in 12 patients. Magn Reson Med 2003; 50:993-1002. [PMID: 14587010 DOI: 10.1002/mrm.10607] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [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: 11/06/2022]
Abstract
The purpose of this study was to determine the value of a blood-pool contrast media (NC100150, Nycomed Imaging (now Amersham Health) Oslo, Norway) for evaluation of venous thrombosis of the deep veins of the pelvis and lower extremities. Twelve patients were prospectively evaluated with conventional X-ray venography (XRV) and MR venography (MRV) after injection of NC100150 (2 ml/kg body weight). The source images and 3D maximum intensity projection (MIP) were viewed on an independent workstation. Diagnosis was made in consensus from two radiologists. Diagnostic image quality was achieved in 87 veins with XRV and MRV. As determined by XRV, thrombus was present in 30 out of 87 veins (34.5%). There was agreement concerning absence or presence of thrombi in 83 out of 87 veins (95.4%; kappa = 0.9 +/- 0.05). Compared to XRV, overall sensitivity and specificity of blood-pool MRV were 93.3% and 96.5%, respectively. Two venous thromboses of the popliteal and posterior tibial vein were diagnosed in MRV, but not in XRV. Conversely, two venous thromboses below the knee had been missed by MRV. NC100150 allows prolonged and improved visualization of the peripheral vasculature and may overcome some limitations of gadolinium contrast media. A more complete examination of the proximal venous tree may be possible than with conventional XRV. Arterial and venous enhancement and motion artifacts can limit image interpretation.
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Affiliation(s)
- Manuela Aschauer
- Department of Magnetic Resonance Imaging, University Hospital Graz, Austria.
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