期刊
EUROPEAN JOURNAL OF RADIOLOGY
卷 81, 期 3, 页码 E217-E222出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.ejrad.2011.01.107
关键词
Dynamic contrast-enhanced MRI; Semi-quantitative parameters; Prostatic carcinoma; Radiotherapy
资金
- Flemish League against Cancer
Purpose: To evaluate the use of semi-quantitative dynamic contrast-enhanced MRI (DCE-MRI) parameters for the detection of prostatic carcinoma in correlation to whole-mount histopathology. Materials and methods: Fifty-three patients with biopsy-proven prostate cancer were examined by DCE-MRI at 1.5-T. Cancerous and benign prostatic tissue regions of interest were delineated based on the histopathology of whole-mount sections and several semi-quantitative parameters were calculated: time to peak (TTP), maximal contrast enhancement (Cpeak), speed of contrast uptake (Wash-in) and clearance rate of the contrast agent (Wash-out). The area under the ROC curve was determined for each parameter. Results: Within individual patients, a consistently higher Cpeak and faster Wash-in were present in cancerous compared to benign prostatic tissue. Both the TTP and the Wash-out occurred more rapidly in tumour tissue than in normal prostatic tissue. Despite a considerable inter-patient overlap of parameter values between tumour and normal prostatic tissue, area under the ROC curve analysis demonstrated that the Wash-in was a good discriminator for cancer and benign tissue (AUC 0.82). Combination of the Wash-in and the Wash-out proved to be even more accurate (AUC 0.87) to discriminate between cancerous and benign prostatic regions. Conclusion: The Wash-in is a useful parameter for prostate cancer detection by DCE-MRI. (C) 2011 Elsevier Ireland Ltd. All rights reserved.
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