Journal Article

Comparison of reduced field-of-view DWI and full field-of view DWI for the differentiation between non-muscle invasive bladder cancer and muscle invasive bladder cancer using VI-RADS

Higashiyama, Akira, Azuma, Haruhito, Yamamoto, Kazuhiro, Narumi, Yoshifumi, Juri, Hiroshi, Yamamoto, Kiyohito, Osuga, Keigo

2022

Overview

To evaluate whether reduced field-of-view (rFOV) DWI sequence improves the differentiation between non-muscle-invasive bladder cancer (NMIBC) and muscle-invasive bladder cancer (MIBC) using VI-RADS. Eighty-nine patients underwent bladder MRI with full field-of-view (fFOV) DWI and rFOV DWI sequence. Images were independently evaluated by 2 radiologists. The sensitivities, specificities, accuracies, and areas under the curve (AUCs) for the differentiation between NMIBC and MIBC with fFOV DWI and with rFOV DWI sequence were calculated using VI-RADS. Apparent diffusion coefficients (ADC) values were measured for each patient and averaged. The sensitivity, specificity, accuracy, and AUC by reader 1 were 92%, 78%, 82% and 0.905 with fFOV DWI, and 92%, 86%, 88% and 0.916 with rFOV DWI sequence, respectively. The sensitivity, specificity, accuracy and AUC by reader 2 were 96%, 76%, 82% and 0.900 with conventional DWI, and 96%, 81%, 85% and 0.907 with rFOV DWI sequence, respectively. The specificity and accuracy of reader 1 were significantly better with rFOV DWI sequence than with fFOV DWI, in contrast there was no significant difference for the others. The average of ADC values of fFOV DWI and rFOV DWI sequence were 1.004×10-6 mm2/s and 1.003×10-6 mm2/s, respectively. The diagnostic ability of rFOV DWI sequence may be better than that of fFOV DWI using VI-RADS for the differentiation between NMIBC and MIBC regardless of image-reading experience, it is controversial.

• Publisher: Public Library of Science,Public Library of Science (PLoS)
• Subject: Area Under Curve / Biology and Life Sciences / Bladder / Bladder cancer / Cancer / Care and treatment / Diagnosis / Diagnosis, Differential / Differentiation / Diffusion coefficient / Diffusion Magnetic Resonance Imaging - methods / Engineering and Technology / Evaluation / Gastrointestinal cancer / Humans / Invasiveness / Magnetic resonance imaging / Medical diagnosis / Medical imaging / Medicine and Health Sciences / Methyl isobutyl carbinol / Muscle Neoplasms - diagnostic imaging / Muscles / Neoplasm Invasiveness - diagnostic imaging / Patients / Research and Analysis Methods / Sensitivity and Specificity / Urinary Bladder Neoplasms - diagnostic imaging / Urinary Bladder Neoplasms - pathology