Deep learning-based magnetic resonance imaging reconstruction for improving the image quality of reduced-field-of-view diffusionweighted imaging of the pancreas

作     者：Yukihisa Takayama Keisuke Sato Shinji Tanaka Ryo Murayama Nahoko Goto Kengo Yoshimitsu 

作者机构：Department of RadiologyFaculty of MedicineFukuoka UniversityFukuoka 8140180Japan 

出 版 物：《World Journal of Radiology》 (世界放射学杂志（英文版）（电子版）)

年 卷 期：2023年第15卷第12期

页      面：338-349页

学科分类：1002[医学-临床医学] 1010[医学-医学技术（可授医学、理学学位）] 100214[医学-肿瘤学] 10[医学] 

主　　题：Deep learning-based reconstruction Magnetic resonance imaging Reduced field-of-view Diffusion-weighted imaging Pancreas 

摘      要：BACKGROUND It has been reported that deep learning-based reconstruction(DLR)can reduce image noise and artifacts,thereby improving the signal-to-noise ratio and image ***,no previous studies have evaluated the efficacy of DLR in improving image quality in reduced-field-of-view(reduced-FOV)diffusionweighted imaging(DWI)[field-of-view optimized and constrained undistorted single-shot(FOCUS)]of the *** hypothesized that a combination of these techniques would improve DWI image quality without prolonging the scan time but would influence the apparent diffusion coefficient *** To evaluate the efficacy of DLR for image quality improvement of FOCUS of the *** This was a retrospective study evaluated 37 patients with pancreatic cystic lesions who underwent magnetic resonance imaging between August 2021 and October *** evaluated three types of FOCUS examinations:FOCUS with DLR(FOCUS-DLR+),FOCUS without DLR(FOCUS-DLR−),and conventional FOCUS(FOCUS-conv).The three types of FOCUS and their apparent diffusion coefficient(ADC)maps were compared qualitatively and *** FOCUS-DLR+(3.62,average score of two radiologists)showed significantly better qualitative scores for image noise than FOCUS-DLR−(2.62)and FOCUS-conv(2.88)(P0.05).Furthermore,FOCUS-DLR+showed the highest contrast ratio and 600 s/mm^(2)(0.72±0.08 and 0.68±0.08)and FOCUS-DLR−showed the highest CR between cystic lesions and the pancreatic parenchyma for the b-values of 0 and 600 s/mm2(0.62±0.21 and 0.62±0.21)(P0.05),***-DLR+provided significantly higher ADCs of the pancreas and lesion(1.44±0.24 and 3.00±0.66)compared to FOCUS-DLR−(1.39±0.22 and 2.86±0.61)and significantly lower ADCs compared to FOCUS-conv(1.84±0.45 and 3.32±0.70)(P0.05),*** This study evaluated the efficacy of DLR for image quality improvement in reduced-FOV DWI of the *** can significantly denoise images without prolonging the scan time or