■呼吸触发(RT)和屏气是磁共振胰胆管造影(MRCP)最常见的采集方式。本研究比较了三种不同的采集方式,以优化胰腺和胆道系统疾病患者MRCP的使用。
■本研究使用了三种MRCP采集方式:传统的呼吸触发采样完美与使用不同翻转进化(RT-SPACE)的应用优化对比,修改后的RT-SPACE,和屏气(BH)空间。包括58例临床怀疑胰腺和胆道系统疾病的患者。所有图像数据均在1.5TMR上采集。比较了三种采集方式的扫描时间和图像质量。弗里德曼测试,随后是事后分析,在三重扫描协议中执行。
■传统RT-SPACE的平均采集时间存在显着差异,修改后的RT-SPACE,和BH-SPACE(167.41±32.11秒vs50.84±73.78秒vs18.00秒,P<0.001)。信噪比(SNR)和对比噪声比(CNR)在三组之间也有显着差异(P<0.001)。RT-SPACE组的SNR和CNR高于BH-SPACE组(P<0.05)。然而,3组整体图像质量差异无统计学意义(P>0.05),图像清晰度,背景抑制,胰腺和胆道系统的可视化。
■使用修改后的RT-SPACE序列进行的MRCP采集大大缩短了具有可比质量图像的采集时间。可以根据患者的情况设计MRCP采集方式,以提高检查通过率,获得良好的诊断图像。
UNASSIGNED: Respiratory-triggered (RT) and breath-hold are the most common acquisition modalities for magnetic resonance cholangiopancreatography (MRCP). The present study compared the three different acquisition modalities for optimizing the use of MRCP in patients with diseases of the pancreatic and biliary systems.
UNASSIGNED: Three MRCP acquisition modalities were used in this study: conventional respiratory-triggered sampling perfection with application-optimized contrasts using different flip evolutions (RT-SPACE), modified RT-SPACE, and breath-hold (BH)-SPACE. Fifty-eight patients with clinically suspected pancreatic and biliary system disease were included. All image data were acquired on a 1.5 T MR. Scan time and image quality were compared between the three acquisition modalities. Friedman test, which was followed by post-hoc analysis, was performed among triple-scan protocol.
UNASSIGNED: There was a significant difference in the mean acquisition time among conventional RT-SPACE, modified RT-SPACE, and BH-SPACE (167.41±32.11 seconds vs 50.84±73.78 seconds vs 18.00 seconds, P <0.001). Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were also significantly different among the three groups (P <0.001). The SNR and CNR were higher in the RT-SPACE group than in the BH-SPACE group (P <0.05). However, there were no statistically significant differences (P >0.05) among the 3 groups regarding quality of overall image, image clarity, background inhibition, and visualization of the pancreatic and biliary system.
UNASSIGNED: MRCP acquisition with the modified RT-SPACE sequence greatly shortens the acquisition time with comparable quality images. The MRCP acquisition modality could be designed based on the patient\'s situation to improve the examination pass rate and obtain excellent images for diagnosis.