T2 relaxation time in the detection and assessment of aggressiveness of peripheral zone cancer in comparison with diffusion-weighted imaging

Aim To investigate the feasibility of T2* relaxation time for distinguishing benign from malignant regions, as well as tumour aggressiveness, within the peripheral zone (PZ) of the prostate in comparison with diffusion-weighted imaging (DWI). Materials and methods Fifty-eight patients with prostate...

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Published in:Clinical radiology 2016-04, Vol.71 (4), p.356-362
Main Authors: Wu, L.-M, Zhou, B, Lu, Q, Suo, S.-T, Liu, Q, Hu, J, Haccke, E.M, Chen, X.-X, Xu, J.-R
Format: Article
Language:English
Subjects:
Aged
Diffusion Magnetic Resonance Imaging
Feasibility Studies
Humans
Magnetic Resonance Imaging - methods
Male
Neoplasm Grading
Neoplasm Invasiveness
Prostate - pathology
Prostatic Neoplasms - pathology
Radiology
Reproducibility of Results
ROC Curve
Sensitivity and Specificity
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Summary:Aim To investigate the feasibility of T2* relaxation time for distinguishing benign from malignant regions, as well as tumour aggressiveness, within the peripheral zone (PZ) of the prostate in comparison with diffusion-weighted imaging (DWI). Materials and methods Fifty-eight patients with prostate cancer underwent 3 T magnetic resonance imaging using multi-echo T2* and DWI (maximum b-value, 2000 s/mm2 ). Parametric maps were obtained for apparent diffusion coefficient (ADC) and T2* values. Two radiologists reviewed these maps and measured ADC and T2* values in sextants positive for cancer at biopsy. Data were analysed using mixed-model analysis of variance and receiver operating characteristic curves. Results Ninety-three sextants exhibited a Gleason score of 6; 59 exhibited a Gleason score of 7 or 8. The T2* value was significantly lower in cancerous sextants than in the benign PZ (48.69+0.60 versus 74.14+0.56, p
ISSN:0009-9260
1365-229X
DOI:10.1016/j.crad.2015.12.012