Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Honjo 1-1-1, Kumamoto, 860-8556, Japan.
Department of Radiology, Kumamoto University Hospital, Kumamoto, Japan, Honjo 1-1-1, Kumamoto, Japan.
Eur Radiol. 2023 Nov;33(11):7585-7594. doi: 10.1007/s00330-023-09703-z. Epub 2023 May 13.
To evaluate the image quality of the 3D hybrid profile order technique and deep-learning-based reconstruction (DLR) for 3D magnetic resonance cholangiopancreatography (MRCP) within a single breath-hold (BH) at 3 T magnetic resonance imaging (MRI).
This retrospective study included 32 patients with biliary and pancreatic disorders. BH images were reconstructed with and without DLR. The signal-to-noise ratio (SNR), contrast, contrast-to-noise ratio (CNR) between the common bile duct (CBD) and periductal tissues, and full width at half maximum (FWHM) of CBD on 3D-MRCP were evaluated quantitatively. Two radiologists scored image noise, contrast, artifacts, blur, and overall image quality of the three image types using a 4-point scale. Quantitative and qualitative scores were compared using the Friedman test and post hoc Nemenyi test.
The SNR and CNR were not significantly different when under respiratory gating- and BH-MRCP without DLR. However, they were significantly higher under BH with DLR than under respiratory gating (SNR, p = 0.013; CNR, p = 0.027). The contrast and FWHM of MRCP under BH with and without DLR were lower than those under respiratory gating (contrast, p < 0.001; FWHM, p = 0.015). Qualitative scores for noise, blur, and overall image quality were higher under BH with DLR than those under respiratory gating (blur, p = 0.003; overall, p = 0.008).
The combination of the 3D hybrid profile order technique and DLR is useful for MRCP within a single BH and does not lead to the deterioration of image quality and space resolution at 3 T MRI.
Considering its advantages, this sequence might become the standard protocol for MRCP in clinical practice, at least at 3.0 T.
• The 3D hybrid profile order can achieve MRCP within a single breath-hold without a decrease in spatial resolution. • The DLR significantly improved the CNR and SNR of BH-MRCP. • The 3D hybrid profile order technique with DLR reduces the deterioration of image quality in MRCP within a single breath-hold.
在 3T 磁共振成像（MRI）中，评估 3D 混合轮廓序技术和基于深度学习的重建（DLR）在单次屏气（BH）下用于 3D 磁共振胰胆管成像（MRCP）的图像质量。
本回顾性研究纳入了 32 例胆道和胰腺疾病患者。分别用有无 DLR 重建 BH 图像。定量评估 3D-MRCP 中胆总管（CBD）的信噪比（SNR）、对比、CBD 与周围组织的对比噪声比（CNR）、CBD 的全宽半最大值（FWHM）。两名放射科医生使用 4 分制对三种图像类型的图像噪声、对比度、伪影、模糊和整体图像质量进行评分。采用 Friedman 检验和事后 Nemenyi 检验比较定量和定性评分。
在呼吸门控和无 DLR 的 BH-MRCP 下，SNR 和 CNR 无显著差异。然而，在 BH 加 DLR 下，SNR 和 CNR 显著高于呼吸门控（SNR，p=0.013；CNR，p=0.027）。在 BH 加和不加 DLR 下，MRCP 的对比度和 FWHM 均低于呼吸门控（对比度，p<0.001；FWHM，p=0.015）。在 BH 加 DLR 下，噪声、模糊和整体图像质量的定性评分均高于呼吸门控（模糊，p=0.003；整体，p=0.008）。
3D 混合轮廓序技术和 DLR 的结合可用于单次 BH 的 MRCP，且不会导致 3T MRI 图像质量和空间分辨率恶化。
考虑到其优势，该序列可能成为临床实践中 MRCP 的标准方案，至少在 3.0T 时是这样。
3D 混合轮廓序可以在不降低空间分辨率的情况下实现单次屏气的 MRCP。
DLR 显著提高了 BH-MRCP 的 CNR 和 SNR。
3D 混合轮廓序技术加 DLR 可减少单次屏气 MRCP 中图像质量的恶化。
