Shortening Acquisition Time and Improving Image Quality for Pelvic MRI Using Deep Learning Reconstruction for Diffusion-Weighted Imaging at 1.5 T

被引：5

作者：

Herrmann, Judith ^{[1
]}

Benkert, Thomas ^{[1
]}

Brendlin, Andreas ^{[1
]}

Gassenmaier, Sebastian ^{[1
]}

Hoelldobler, Thomas ^{[1
]}

Maennlin, Simon ^{[1
]}

Almansour, Haidara ^{[1
]}

Lingg, Andreas ^{[1
]}

Weiland, Elisabeth ^{[1
]}

Afat, Saif ^{[1
]}

机构：

[1] Eberhard Karls Univ Tuebingen, Dept Diagnost & Intervent Radiol, Hoppe Seyler Str 3, D-72076 Tubingen, Germany

来源：

ACADEMIC RADIOLOGY | 2024年 / 31卷 / 03期

关键词：

Diffusion-weighted imaging; Pelvic imaging; MRI; Deep learning reconstruction; SUPERRESOLUTION; BENIGN;

D O I：

10.1016/j.acra.2023.06.035

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Rationale and Objectives: To determine the impact on acquisition time reduction and image quality of a deep learning (DL) reconstruction for accelerated diffusion-weighted imaging (DWI) of the pelvis at 1.5 T compared to standard DWI. Materials and Methods: A total of 55 patients (mean age, 61 +/- 13 years; range, 27-89; 20 men, 35 women) were consecutively included in this retrospective, monocentric study between February and November 2022. Inclusion criteria were (1) standard DWI (DWIS) in clinically indicated magnetic resonance imaging (MRI) at 1.5 T and (2) DL-reconstructed DWI (DWIDL). All patients were examined using the institution's standard MRI protocol according to their diagnosis including DWI with two different b-values (0 and 800 s/mm(2)) and calculation of apparent diffusion coefficient (ADC) maps. Image quality was qualitatively assessed by four radiologists using a visual 5-point Likert scale (5 = best) for the following criteria: overall image quality, noise level, extent of artifacts, sharpness, and diagnostic confidence. The qualitative scores for DWIS and DWIDL were compared with the Wilcoxon signed-rank test. Results: The overall image quality was evaluated to be significantly superior in DWIDL compared to DWIS for b = 0 s/mm(2), b = 800 s/mm(2), and ADC maps by all readers (P < .05). The extent of noise was evaluated to be significantly less in DWIDL compared to DWIS for b = 0 s/mm(2), b = 800 s/mm(2), and ADC maps by all readers (P < .001). No significant differences were found regarding artifacts, lesion detectability, sharpness of organs, and diagnostic confidence (P > .05). Acquisition time for DWIS was 2:06 minutes, and simulated acquisition time for DWIDL was 1:12 minutes. Conclusion: DL image reconstruction improves image quality, and simulation results suggest that a reduction in acquisition time for diffusion-weighted MRI of the pelvis at 1.5 T is possible.

引用

页码：921 / 928

页数：8