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Wang D, Xu S, Zhang K, Zhang X, Yang X, Xiao M, Su Q, Wan M. A fast scheme for renal microvascular perfusion functional imaging: Assessed by an imaging quality evaluation model. Med Phys 2018; 46:738-745. [PMID: 30585642 DOI: 10.1002/mp.13358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 11/14/2018] [Accepted: 12/14/2018] [Indexed: 11/09/2022] Open
Abstract
PURPOSE This study aimed to develop a fast scheme of multiparametric perfusion functional imaging (PFI) based on dynamic contrast-enhanced ultrasound (DCEUS) for assessing renal microvascular hemodynamics. METHOD The flow process in the DCEUS-based PFI was modified step-by-step to improve its operational efficiency, which was validated through in vivo renal perfusion experiments. A multiparametric model with a comprehensive coefficient of imaging quality (CIQ) was then built on four terms of the average information entropy, contrast, gray, and noise coefficient of PFIs to evaluate the sacrifice of imaging quality during modifications of DCEUS-based PFI. RESULTS The multiparametric model successfully evaluated modifications of DCEUS-based PFI from multiple perspectives (R2 = 0.73, P < 0.01). Compared with the raw scheme in the renal sagittal and coronal planes, the fast PFI scheme significantly improved its operational efficiency by 62.82 ± 1.07% (P < 0.01) and the nine PFIs simultaneously maintained a similar CIQ of 0.26 ± 0.06. CONCLUSIONS The inhomogeneous hemodynamic distributions with a ring-like feature in the renal microvasculature were accurately and efficiently characterized by the fast PFI scheme. The fast PFI scheme can be applied for early diagnosis, follow-up evaluation and monitoring treatment of chronic kidney disease.
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Affiliation(s)
- Diya Wang
- Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, 710049, China.,Department of Radiology, Radio-Oncology and Nuclear Medicine, Institute of Biomedical Engineering, University of Montreal, Montreal, QC, H2X 0A9, Canada
| | - Shanshan Xu
- Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, 710049, China
| | - Kejia Zhang
- Department of Plastic and Cosmetic Surgery, The Eastern Division of The First Hospital of Jilin University, Changchun, 130031, China
| | - Xinyu Zhang
- Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, 710049, China
| | - Xuan Yang
- Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, 710049, China
| | - Mengnan Xiao
- Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, 710049, China
| | - Qiang Su
- Department of Oncology, Beijing Friendship Hospital, Capital Medical University, Beijing, 1000050, China
| | - Mingxi Wan
- Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, 710049, China
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Wang D, Su Z, Su Q, Zhang X, Qu Z, Wang N, Zong Y, Yang Y, Wan M. Evaluation of accuracy of automatic out-of-plane respiratory gating for DCEUS-based quantification using principal component analysis. Comput Med Imaging Graph 2018; 70:155-164. [DOI: 10.1016/j.compmedimag.2018.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Revised: 09/01/2018] [Accepted: 10/18/2018] [Indexed: 01/24/2023]
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Wang D, Su Z, Zhang Y, Zhao X, Wang S, Wan M. DCEUS-based multiparametric perfusion imaging using pulse-inversion Bubblet decorrelation. Med Phys 2018; 45:2509-2517. [PMID: 29611197 DOI: 10.1002/mp.12897] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 03/22/2018] [Accepted: 03/23/2018] [Indexed: 11/09/2022] Open
Abstract
PURPOSE This study aimed to clarify the influences of composite dynamic contrast-enhanced ultrasound (DCEUS) on multiparametric perfusion imaging (PPI) and to develop a novel PPI scheme through pulse-inversion Bubblet decorrelation (PIBD) to improve its contrast and detailed discriminability. METHOD In in vivo perfusion experiments on rabbit kidneys, a pair of phase-inverted "Bubblets" was constructed. Phase-inverted raw radiofrequency echoes were reconstructed by using the maximum coefficients obtained from Bubblet decorrelation analysis and summed to form DCEUS loops. Nine perfusion parameters were estimated from these loops and color coded to create the corresponding PIBD-based PPIs. RESULTS In addition to time-related PPIs, the contrast and detailed discriminability quantified by the average contrast and information entropy of intensity- and ratio-related PPIs were proportional to the microbubble detection sensitivity and microvascular discriminability evaluated by CTR in DCEUS techniques. Compared with the second harmonic, the CTR of DCEUS and the average contrast and information entropy of PPI were significantly improved by 9.03 ± 5.39 dB (P < 0.01), 6.39 ± 1.38 dB (P < 0.01), and 0.57 ± 0.15 (P < 0.05) in PIBD technique, respectively. CONCLUSIONS As a multiparametric functional imaging technique, these improvements in the proposed scheme can be beneficial to accurately quantify and depict the hemodynamic perfusion features and details of tumor angiogenesis, and further can also assist clinicians in making a confirmed diagnosis.
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Affiliation(s)
- Diya Wang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi'an, 710049, China.,Laboratory of Biorheology and Medical Ultrasonics, University of Montreal Hospital Research Center, Montreal, Quebec, H2X 0A9, Canada
| | - Zhe Su
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi'an, 710049, China
| | - Yu Zhang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi'an, 710049, China
| | - Xiaoyan Zhao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi'an, 710049, China
| | - Supin Wang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi'an, 710049, China
| | - Mingxi Wan
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi'an, 710049, China
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Wang D, Xiao M, Zhang Y, Wan M. Abdominal parametric perfusion imaging with respiratory motion-compensation based on contrast-enhanced ultrasound: In-vivo validation. Comput Med Imaging Graph 2018; 65:11-21. [DOI: 10.1016/j.compmedimag.2017.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 06/03/2017] [Accepted: 06/19/2017] [Indexed: 10/19/2022]
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Wang D, Xiao M, Hu H, Zhang Y, Su Z, Xu S, Zong Y, Wan M. DCEUS-based focal parametric perfusion imaging of microvessel with single-pixel resolution and high contrast. ULTRASONICS 2018; 84:392-403. [PMID: 29245119 DOI: 10.1016/j.ultras.2017.11.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 11/23/2017] [Accepted: 11/29/2017] [Indexed: 06/07/2023]
Abstract
This study aimed to develop a focal microvascular contrast-enhanced ultrasonic parametric perfusion imaging (PPI) scheme to overcome the tradeoff between the resolution, contrast, and accuracy of focal PPI in the tumor. Its resolution was limited by the low signal-to-clutter ratio (SCR) of time-intensity-curves (TICs) induced by multiple limitations, which deteriorated the accuracy and contrast of focal PPI. The scheme was verified by the in-vivo perfusion experiments. Single-pixel TICs were first extracted to ensure PPI with the highest resolution. The SCR of focal TICs in the tumor was improved using respiratory motion compensation combined with detrended fluctuation analysis. The entire and focal PPIs of six perfusion parameters were then accurately created after filtrating the valid TICs and targeted perfusion parameters. Compared with those of the conventional PPIs, the axial and lateral resolutions of focal PPIs were improved by 30.29% (p < .05) and 32.77% (p < .05), respectively; the average contrast and accuracy evaluated by SCR improved by 7.24 ± 4.90 dB (p < .05) and 5.18 ± 1.28 dB (p < .05), respectively. The edge, morphostructure, inhomogeneous hyper-enhanced distribution, and ring-like perfusion features in intratumoral microvessel were accurately distinguished and highlighted by the focal PPIs. The developed focal PPI can assist clinicians in making confirmed diagnoses and in providing appropriate therapeutic strategies for liver tumor.
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Affiliation(s)
- Diya Wang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, PR China; Laboratory of Biorheology and Medical Ultrasonics, University of Montreal Hospital Research Center, Montreal, QC, Canada
| | - Mengnan Xiao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, PR China
| | - Hong Hu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, PR China
| | - Yu Zhang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, PR China
| | - Zhe Su
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, PR China
| | - Shanshan Xu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, PR China
| | - Yujin Zong
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, PR China
| | - Mingxi Wan
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi' an Jiaotong University, Xi' an, PR China.
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Assessment of renal perfusion impairment in a rat model of acute renal congestion using contrast-enhanced ultrasonography. Heart Vessels 2017; 33:434-440. [DOI: 10.1007/s00380-017-1063-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Accepted: 10/06/2017] [Indexed: 10/18/2022]
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Lee JH, Lee JM, Kim SJ, Baek JH, Yun SH, Kim KW, Han JK, Choi BI. Enhancement patterns of hepatocellular carcinomas on multiphasicmultidetector row CT: comparison with pathological differentiation. Br J Radiol 2012; 85:e573-83. [PMID: 22919011 DOI: 10.1259/bjr/86767895] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE The objective of this study was to determine the incidence of typical and atypical enhancement patterns of hepatocellular carcinomas (HCCs) on multiphasic multidetector row CT (MDCT) and to correlate the enhancement patterns and morphological image findings of HCC with the degree of tumour differentiation. METHODS MDCT images of 217 patients with 243 surgically proven HCCs were evaluated through consensus reading by two radiologists. Our MDCT protocol was composed of precontrast, arterial, portal and delayed phases. The reviewers analysed the CT images for degree of attenuation; relative timing of washout; presence of dysmorphic intratumoral vessels, aneurysms and necrosis; tumour size; tumour margin; presence of pseudocapsule; intratumoral heterogeneity; and determined enhancement pattern. The imaging features were correlated with tumour differentiation using Fisher's exact test or the χ(2) test. RESULTS Among 243 HCCs, 137 (56.4%) showed the typical enhancement pattern of HCC, which is arterial enhancement and washout on portal or equilibrium phase images. In the arterial phase, 190 of 243 (78.2%) HCCs showed hypervascularity, with approximately three quarters of poorly differentiated (PD) (34 of 45, 75.6%) and moderately differentiated (MD) HCCs (92 of 123, 74.8%) showing washout during the portal or delayed phases, vs only 50% of well-differentiated (WD) HCCs (11 of 22; p<0.048). The presence of intratumoral vessels and aneurysms, tumour necrosis, attenuation of precontrast, the relative timing of washout, intratumoral attenuation heterogeneity, tumour margin and tumour size were correlated with the pathological differentiation of HCCs (p<0.05). CONCLUSION A typical enhancement of HCCs on MDCT was not unusual (43.6%) and WD and PD HCCs account for most of the atypical enhancement patterns. Early washout favoured MD and PD HCCs rather than WD HCCs, whereas in our study the presence of intratumoral aneurysm was a highly specific finding for PD HCC.
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Affiliation(s)
- J H Lee
- Department of Radiology, Seoul National University Hospital, Seoul, Republic of Korea
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Rognin NG, Arditi M, Mercier L, Frinking PJA, Schneider M, Perrenoud G, Anaye A, Meuwly JY, Tranquart F. Parametric imaging for characterizing focal liver lesions in contrast-enhanced ultrasound. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2010; 57:2503-11. [PMID: 21041137 DOI: 10.1109/tuffc.2010.1716] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The differentiation between benign and malignant focal liver lesions plays an important role in diagnosis of liver disease and therapeutic planning of local or general disease. This differentiation, based on characterization, relies on the observation of the dynamic vascular patterns (DVP) of lesions with respect to adjacent parenchyma, and may be assessed during contrast-enhanced ultrasound imaging after a bolus injection. For instance, hemangiomas (i.e., benign lesions) exhibit hyper-enhanced signatures over time, whereas metastases (i.e., malignant lesions) frequently present hyperenhanced foci during the arterial phase and always become hypo-enhanced afterwards. The objective of this work was to develop a new parametric imaging technique, aimed at mapping the DVP signatures into a single image called a DVP parametric image, conceived as a diagnostic aid tool for characterizing lesion types. The methodology consisted in processing a time sequence of images (DICOM video data) using four consecutive steps: (1) pre-processing combining image motion correction and linearization to derive an echo-power signal, in each pixel, proportional to local contrast agent concentration over time; (2) signal modeling, by means of a curve-fitting optimization, to compute a difference signal in each pixel, as the subtraction of adjacent parenchyma kinetic from the echopower signal; (3) classification of difference signals; and (4) parametric image rendering to represent classified pixels as a support for diagnosis. DVP parametric imaging was the object of a clinical assessment on a total of 146 lesions, imaged using different medical ultrasound systems. The resulting sensitivity and specificity were 97% and 91%, respectively, which compare favorably with scores of 81 to 95% and 80 to 95% reported in medical literature for sensitivity and specificity, respectively.
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Watanabe M, Shiozawa K, Takahashi M, Wakui N, Otsuka Y, Kaneko H, Tanikawa K, Shibuya K, Kamiyama N, Sumino Y. Parametric imaging using contrast-enhanced ultrasound with Sonazoid for hepatocellular carcinoma. J Med Ultrason (2001) 2010; 37:81-6. [PMID: 27277718 DOI: 10.1007/s10396-009-0254-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2009] [Accepted: 11/08/2009] [Indexed: 01/11/2023]
Abstract
PURPOSE To clarify the usefulness of parametric imaging using contrast-enhanced ultrasound (CE-US) with Sonazoid by comparing parametric images of hepatocellular carcinoma (HCC) with histopathological findings. METHODS Two patients with HCCs underwent CE-US with Sonazoid before surgical resection. A single focus point was set at the lower margin of the tumor, and a bolus intravenous injection of Sonazoid (0.5 ml) was administered. Images of the ideal scanning plane were displayed in real-time mode for the early vascular phase. We analyzed these images using prototype PC software. The software watches, pixel by pixel, the increase in the intensity due to the inflow of the microbubbles, and displays colors if the intensity becomes larger than a certain threshold. Parametric images were compared with histopathological findings. RESULTS The level of blood flow in the tumor could be visually evaluated using a single image by expressing the detailed hemodynamics of the tumor in terms of differences in color using a time axis appropriate for each case. CONCLUSIONS Parametric imaging is a very useful way of facilitating straightforward visualization of the level of blood flow within HCC and the distribution of histopathological findings in single static images.
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Affiliation(s)
- Manabu Watanabe
- Department of Gastroenterology and Hepatology, Toho University Medical Center, Omori Hospital, 6-11-1, Omorinishi, Ota-ku, Tokyo, 143-8541, Japan.
| | - Kazue Shiozawa
- Department of Gastroenterology and Hepatology, Toho University Medical Center, Omori Hospital, 6-11-1, Omorinishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Masayoshi Takahashi
- Department of Gastroenterology and Hepatology, Toho University Medical Center, Omori Hospital, 6-11-1, Omorinishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Noritaka Wakui
- Department of Gastroenterology and Hepatology, Toho University Medical Center, Omori Hospital, 6-11-1, Omorinishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Yuichiro Otsuka
- Department of Hepato-Biliary-Pancreatic Surgery, Toho University Medical Center, Omori Hospital, 6-11-1, Omorinishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Hironori Kaneko
- Department of Hepato-Biliary-Pancreatic Surgery, Toho University Medical Center, Omori Hospital, 6-11-1, Omorinishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Kayoko Tanikawa
- Department of Surgical Pathology, Toho University Medical Center, Omori Hospital, 6-11-1, Omorinishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Kazutoshi Shibuya
- Department of Surgical Pathology, Toho University Medical Center, Omori Hospital, 6-11-1, Omorinishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Naohisa Kamiyama
- The Ultrasound Systems Development Department, Toshiba Medical Systems Corporation, Otawara, Tochigi, Japan
| | - Yasukiyo Sumino
- Department of Gastroenterology and Hepatology, Toho University Medical Center, Omori Hospital, 6-11-1, Omorinishi, Ota-ku, Tokyo, 143-8541, Japan
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Pollard RE, Dayton PA, Watson KD, Hu X, Guracar IM, Ferrara KW. Motion corrected cadence CPS ultrasound for quantifying response to vasoactive drugs in a rat kidney model. Urology 2009; 74:675-81. [PMID: 19589583 DOI: 10.1016/j.urology.2009.01.086] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2008] [Revised: 01/12/2009] [Accepted: 01/27/2009] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To establish the ability of contrast-enhanced motion corrected cadence pulse sequencing (CPS) to detect changes in renal blood flow induced by vasoactive substances in rats. METHODS Ultrasound contrast media was administered as a constant rate infusion into a phantom at a known rate and CPS data acquired. Rats were anesthetized and predrug CPS estimates of replenishment rate were made for the right kidney. Real-time motion correction was applied, and parametric images were generated from the CPS data. Group 1 rats (n = 7) were administered a vasodilator and group 2 rats (n = 3) were administered a vasoconstrictor. The CPS imaging of the kidney was repeated after ample time for drug effects to occur. RESULTS Contrast CPS accurately estimated flow velocity in the phantom model. In addition, CPS defined statistically significant differences between pre- and postdrug blood flow in the renal medulla (vasodilator, P < .01; vasoconstrictor, P < .0001) and cortex (vasoconstrictor, P < .0001). CONCLUSIONS We conclude that motion-corrected CPS ultrasound provides real-time quantification of renal blood flow alterations and may prove useful for the assessment of blood flow in transplanted kidneys.
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Affiliation(s)
- Rachel E Pollard
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, California 95616, USA.
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