Differential diagnosis of localized prostate cancer:comparing diffusion weighted imaging with apparent diffusion coefficients
10.3969/j.issn.1007-3969.2014.03.010
- VernacularTitle:前列腺局限性病变良恶性鉴别诊断:弥散加权成像图与表观弥散系数值比较
- Author:
Xuerong YANG
;
Xiaohang LIU
;
Liangping ZHOU
- Publication Type:Journal Article
- Keywords:
Prostate cancer;
Diffusion weighted imaging;
Apparent diffusion coefifcient
- From:
China Oncology
2014;(3):212-216
- CountryChina
- Language:Chinese
-
Abstract:
Background and purpose: Since the detection of localized prostate cancer is increasing, it's important to distinguish from benign lesions like prostatitis. This study aimed to compare diffusion weighted imaging with apparent diffusion coefifcients in differential diagnosis of localized prostate cancer on 3.0T MR. Methods:Sixty-nine cases with localized prostate cancer proved by pathology, 43 in perpheral zone (PZ) and 26 in central gland (CG), 33 with prostatitis, and 37 with benign prostatic hyperplasia (BPH) were analyzed. The signal noise ratio (SNR) and apparent diffusion coefifcient (ADC) value of lesions were measured, and a semiquantitative grading of DW image was performed. The diagnostic accuracy of both methods was evaluated by ROC. Results:45 cancer foci and 36 prostatitis lesions in PZ, 27 cancer foci and 42 BPH lesions in CG were included. The sensitivity and speciifcity for ADC value to distinguish cancer from begin lesions in PZ and CG were 88.9%and 86.1%、81.5%and 73.8%respectively. The diagnostic accuracy of ADC value was higher than DWI semiquantitative grading and SNR (P<0.05). Conclusion:ADC value yielded a higher accuracy in differential diagnosis of localized prostate cancer on 3.0T MR, thus it’s recommended as a major index for diagnosis.