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Exponential apparent diffusion coefficient in evaluating prostate cancer at 3 T: preliminary experience

Authors
 SUNG Y PARK  ;  CHAN K KIM  ;  JUNG J PARK  ;  BYUNG K PARK 
Citation
 BRITISH JOURNAL OF RADIOLOGY, Vol.89(1058) : 20150470, 2016 
Journal Title
 BRITISH JOURNAL OF RADIOLOGY 
ISSN
 0007-1285 
Issue Date
2016
MeSH
Aged ; Aged, 80 and over ; Diffusion Magnetic Resonance Imaging/methods* ; Feasibility Studies ; Humans ; Image Enhancement/methods ; Image Interpretation, Computer-Assisted/methods ; Male ; Middle Aged ; Neoplasm Grading ; Prostatic Neoplasms/pathology* ; Prostatic Neoplasms/surgery ; Retrospective Studies
Abstract
OBJECTIVE: To investigate the feasibility of exponential apparent diffusion coefficient (eADC) derived from diffusion-weighted imaging (DWI) in evaluating prostate cancers at 3 T. METHODS: 74 consecutive patients with surgically confirmed single peripheral zone (PZ) prostate cancer ≥0.5 cm(3) who underwent pre-operative DWI at 3 T were retrospectively selected. Based on radiological-pathological correlation, eADC and apparent diffusion coefficient (ADC) (×10(-3) mm(2) s(-1)) for the cancers and benign PZ were measured by two independent readers. Tumour eADC or ADC was correlated with Gleason score. Receiver operating characteristic curve analysis was performed to differentiate between Gleason score 6 and 7 or higher, by eADC and ADC. Lesion-to-background contrast ratio was compared between eADC and ADC. RESULTS: Mean tumour eADC (0.48-0.50) and ADC (0.72-0.75) were significantly different from those of benign PZ (eADC, 0.20-0.27; ADC, 1.34-1.66), respectively (p < 0.001). A moderate correlation between tumour eADC or ADC and Gleason score was seen. For differentiating between Gleason score 6 and 7 or higher, eADC (0.818-0.883) showed a similar area under the curve with ADC (0.840-0.889) (p > 0.05). Lesion-to-background contrast ratio of eADC (Reader 1, 2.43; Reader 2, 2.23) was significantly greater than that of ADC (Reader 1, 2.21; Reader 2, 2.12) (p < 0.001). CONCLUSION: The eADC may offer similar diagnostic utility with ADC in the differentiation of the cancer from benign prostate tissue. Moreover, the eADC appears to allow improved tissue contrast. ADVANCES IN KNOWLEDGE: The eADC may be a comparable alternative to ADC for evaluating prostate cancer, with removing T2 shine-through effects from DWI.
Full Text
http://www.birpublications.org/doi/abs/10.1259/bjr.20150470
DOI
10.1259/bjr.20150470
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Park, Sung Yoon(박성윤)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/146578
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