Short repetition time diffusion-weighted imaging improves visualization of prostate cancer.

Autor: Higaki, Atsushi, Tamada, Tsutomu, Kido, Ayumu, Takeuchi, Mitsuru, Ono, Kentaro, Miyaji, Yoshiyuki, Yoshida, Koji, Sanai, Hiroyasu, Moriya, Kazunori, Yamamoto, Akira
Zdroj: Japanese Journal of Radiology; May2024, Vol. 42 Issue 5, p487-499, 13p
Abstrakt: Purpose: This study aimed to assess whether short repetition time (TR) diffusion-weighted imaging (DWI) could improve diffusion contrast in patients with prostate cancer (PCa) compared with long TR (conventional) reference standard DWI. Materials and methods: Our Institutional Review Board approved this retrospective study and waived the need for informed consent. Twenty-five patients with suspected PCa underwent multiparametric magnetic resonance imaging (mp-MRI) using a 3.0-T system. DWI was performed with TR of 1850 ms (short) and 6000 ms (long) with b-values of 0, 1000, and 2000s/mm2. Signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), visual score, apparent diffusion coefficient (ADC), and diagnostic performance were compared between short and long TR DWI for both b-values. The statistical tests included paired t-test for SNR and CNR; Wilcoxon signed-rank test for VA; Pearson's correlation and Bland–Altman plot analysis for ADC; and McNemar test and receiver operating characteristic analysis and Delong test for diagnostic performance. Results: Regarding b1000, CNR and visual score were significantly higher in short TR compared with long TR (P =.003 and P =.002, respectively), without significant difference in SNR (P =.21). Considering b2000, there was no significant difference in visual score between short and long TR (P =.07). However, SNR and CNR in long TR were higher (P =.01 and P =.04, respectively). ADC showed significant correlations, without apparent bias for ADC between short and long TR for both b-values. For diagnostic performance of DWI between short and long TR for both b-values, one out of five readers noted a significant difference, with the short TR for both b-values demonstrating superior performance. Conclusions: Our data showed that the short TR DWI1000 may provide better image quality than did the long TR DWI1000 and may improve visualization and diagnostic performance of PCa for readers. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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