Department of Radiology, Eunpyeong St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
Siemens Healthineers Ltd, Seoul, Korea.
Neuroradiology. 2022 Dec;64(12):2399-2407. doi: 10.1007/s00234-022-03028-2. Epub 2022 Aug 3.
The purpose of this study was to compare the image quality of the 3D T2-weighted images accelerated using conventional method (CAI-SPACE) with the images accelerated using compressed sensing (CS-SPACE) in pediatric brain imaging.
A total of 116 brain MRI (53 with CAI-SPACE and 63 with CS-SPACE) were obtained from children 16 years old or younger. Quantitative image quality was evaluated using the apparent signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR). The sequences were qualitatively evaluated for overall image quality, general artifact, cerebrospinal fluid (CSF)-related artifact, and grey-white matter differentiation. The two sequences were compared for the total and two age groups (< 24 months vs. ≥ 24 months).
Compressed sensing application in 3D T2-weighted imaging resulted in 8.5% reduction in scanning time. Quantitative image quality analysis showed higher apparent SNR (median [Interquartile range]; 29 [25] vs. 23 [14], P = 0.005) and CNR (0.231 [0.121] vs. 0.165 [0.120], P = 0.027) with CS-SPACE compared to CAI-SPACE. Qualitative image quality analysis showed better image quality with CS-SPACE for general (P = 0.024) and CSF-related artifact (P < 0.001). CSF-related artifacts reduction was prominent in the older age group (≥ 24 months). Overall image quality (P = 0.162) and grey-white matter differentiation (P = 0.397) were comparable between CAI-SPACE and CS-SPACE.
Compressed sensing application in 3D T2-weighted images modestly reduced acquisition time and lowered CSF-related artifact compared to conventional images of the pediatric brain.
本研究旨在比较使用常规方法（CAI-SPACE）加速和使用压缩感知（CS-SPACE）加速的儿童脑部成像 3D T2 加权图像的图像质量。
共获得 116 例年龄在 16 岁及以下儿童的脑部 MRI（53 例采用 CAI-SPACE，63 例采用 CS-SPACE）。使用表观信噪比（SNR）和对比噪声比（CNR）评估定量图像质量。对总体图像质量、一般伪影、脑脊液（CSF）相关伪影和灰白质区分进行定性评估。比较两种序列的总扫描时间和两个年龄组（<24 个月和≥24 个月）的扫描时间。
3D T2 加权成像中应用压缩感知可使扫描时间减少 8.5%。定量图像质量分析显示，CS-SPACE 的表观 SNR（中位数[四分位数间距]；29[25]比 23[14]，P=0.005）和 CNR（0.231[0.121]比 0.165[0.120]，P=0.027）均高于 CAI-SPACE。定性图像质量分析显示，CS-SPACE 的总体（P=0.024）和 CSF 相关伪影（P<0.001）质量更好。在年龄较大的组（≥24 个月）中，CSF 相关伪影减少更为明显。总体图像质量（P=0.162）和灰白质区分（P=0.397）在 CAI-SPACE 和 CS-SPACE 之间无差异。
与儿童脑部常规图像相比，3D T2 加权图像中应用压缩感知可适度减少采集时间，并降低 CSF 相关伪影。
