Radiological Technology Department, Medical Technical Support Division, Tokai University Hachioji Hospital School of Medicine, 1838 Ishikawa-Machi, Hachioji, Tokyo, 192-0032, Japan.
Human Life and Health Sciences, Graduate School of Arts and Sciences, The Open University of Japan, Chiba, Japan.
Radiol Phys Technol. 2024 Dec;17(4):888-895. doi: 10.1007/s12194-024-00846-2. Epub 2024 Sep 27.
The breath-hold (BH) 3D magnetic resonance cholangiopancreatography method has been reported to suppress "respiratory artifacts"; however, the influence of gastrointestinal peristalsis around the target organs has not been discussed. In contrast, the autonomic nervous system has been reported to affect gastrointestinal peristalsis and BH imaging has been reported to influence venous blood flow signal (BFS) through its involvement with the autonomic nervous system. We examined the impact of BH imaging on gastrointestinal peristalsis. Seven healthy volunteers participated. Three respiratory patterns-free breathing (FB), BH at maximum inspiration (Insp-BH), and BH at maximum expiration (Exp-BH)-were used. Gastrointestinal peristalsis was measured using cine MRI. Cine MRI data were analyzed using the normalized interframe difference method, focusing on the duodenum and gastric body. Hemodynamic changes resulting from BH methods were evaluated using 2D phase contrast, targeting the inferior vena cava (IVC). The BFS was examined for all phases of each respiratory pattern. Peristalsis variation in the duodenum showed no significant differences among FB, Exp-BH, and Insp-BH. In the gastric body, no significant differences were observed between FB and Exp-BH or between Exp-BH and Insp-BH. However, a significant difference emerged between FB and Insp-BH. Regarding BFS, in the IVC, significant differences were observed between Exp-BH and Insp-BH and between FB and Insp-BH (both, p < 0.01), with no significant difference between FB and Exp-BH. Insp-BH reduces venous blood flow and suppresses the influence of peristalsis variation.
屏气（BH）3D 磁共振胰胆管成像方法已被报道可以抑制“呼吸伪影”；然而，围绕目标器官的胃肠道蠕动的影响尚未讨论。相比之下，自主神经系统已被报道会影响胃肠道蠕动，而 BH 成像已被报道通过与自主神经系统的相互作用影响静脉血流信号（BFS）。我们研究了 BH 成像对胃肠道蠕动的影响。七名健康志愿者参与了此项研究。使用三种呼吸模式——自由呼吸（FB）、最大吸气时的 BH（Insp-BH）和最大呼气时的 BH（Exp-BH）。使用电影 MRI 测量胃肠道蠕动。使用归一化帧间差法分析电影 MRI 数据，重点关注十二指肠和胃体。使用二维相位对比评估 BH 方法引起的血流动力学变化，目标是下腔静脉（IVC）。检查了每个呼吸模式所有相位的 BFS。十二指肠蠕动变化在 FB、Exp-BH 和 Insp-BH 之间没有显著差异。在胃体中，FB 和 Exp-BH 之间或 Exp-BH 和 Insp-BH 之间没有观察到显著差异。然而，在 FB 和 Insp-BH 之间出现了显著差异。关于 BFS，在 IVC 中，Exp-BH 和 Insp-BH 之间以及 FB 和 Insp-BH 之间存在显著差异（均 p<0.01），而 FB 和 Exp-BH 之间没有显著差异。Insp-BH 减少静脉血流并抑制蠕动变化的影响。
