3D SPACE与屏气压缩感知技术在MRCP成像中的对比研究  

Comparison Study of 3D SPACE and Breath-Hold Compressed Sensing Technology in MR Cholangiopancreatography

作　　者：李青[1] 王传兵[1] 徐露露[1] 刘波[1] 孙涛[1] LI Qing;WANG Chuanbing;XU Lulu;LIU Bo;SUN Tao(Department of Radiology,The First Affiliated Hospital of Nanjing Medical University,Nanjing Jiangsu 210029,China)

机构地区：[1]南京医科大学第一附属医院放射科,江苏南京210029

出　　处：《中国医疗设备》2022年第9期57-60,共4页China Medical Devices

基　　金：江苏高校优势学科建设工程资助项目(JX10231801)。

摘　　要：目的探讨压缩感知(Compressed Sensing,CS)技术在屏气磁共振胰胆管造影(Magnetic Resonance Cholangiopancreatography,MRCP)中的临床应用价值。方法对40例患者同时行膈肌导航3D可变反转角快速自旋回波(Sampling Perfection with Application-Optimized Contrast Using Different Flip-Angle Evolutions,SPACE)MRCP和屏气压缩感知3D MRCP(欠采样率3.6%)序列扫描,根据序列不同将图像分为SPACE-MRCP和CS-MRCP 2组。定性分析2组图像整体质量、背景抑制效果和胰管的显示能力;定量分析2组图像的扫描时间、信噪比(Signal to Noise Ratio,SNR)和对比噪声比(Contrast to Noise Ratio,CNR)。结果图像整体质量评分、背景抑制效果方面,CS-MRCP均优于SPACE-MRCP,差异有统计学意义(P<0.05)。胰管显示能力方面,CS-MRCP与SPACE-MRCP相当,差异无统计学意义(P<0.05);SPACE-MRCP和CS-MRCP扫描时间分别为(260.95±61.70)、17 s,差异有统计学意义(P<0.05)。SNR和CNR分析中,CS-MRCP均优于SPACE-MRCP,差异有统计学意义(P<0.05)。结论采用压缩感知技术的屏气MRCP序列与膈肌导航3D SPACE序列相比,可显著缩短扫描时间,获得更好的图像质量。Objective To explore the clinical value of the breath-hold compressed sensing(CS)technology in magnetic resonance cholangiopancreatography(MRCP).Methods Forty patients who underwent both 3D navigator triggered MRCP using sampling perfection with SPACE and 3D breath-hold CS MRCP(sub-nyquist rate was 3.6%)were divided into two groups(SPACE-MRCP and CS-MRCP).Two radiologists independently analyzed overall image quality,background suppression effect and pancreatic duct visualization qualitatively.The scan time,signal to noise ratio(SNR)and contrast to noise ratio(CNR)of two groups were quantitatively analyzed.Results In all patients,CS-MRCP showed better overall image quality and background suppression than SPACE-MRCP and the differences were statistically significant(P<0.05).There was no statistically significance in the pancreatic duct visualization ability between CS-MRCP and SPACE-MRCP(P>0.05).The scanning time of SPACE-MRCP and CS-MRCP was(260.95±61.70),17 s,respectively,and the difference was statistically significant(P<0.05).For the quantitative image quality of SNR and CNR,CS-MRCP was superior to SPACE-MRCP,and the difference was statistically significant(P<0.05).Conclusion Compared to the 3D navigator triggered SPACE-MRCP,the 3D breath-hold CS-MRCP technology can shorten the scanning time and improve image quality.

关 键 词：磁共振胰胆管造影 压缩感知 三维可变反转角快速自旋回波 屏气 

分 类 号：R445.2[医药卫生—影像医学与核医学]