摘要
目的:比较螺旋浆(PROPELLER)扫描技术和单次激发快速自旋回波(SSFSE)扫描技术颅脑磁共振成像的图像质量,揭示PROPELLER这一独特的成像技术在未镇静不配合受检者颅脑磁共振成像中临床应用价值。方法:25例疑颅内病变的临床受检者,采用PROP-T2WI和SSFSE-T2WI扫描所获得的T2WI磁共振图像,由影像科医师,未告知采用扫描方法的前提下,对其图像质量进行评价,分析图像的运动伪影、病灶显示和图像优质片率状况,将影像科医师判读两种扫描技术所获得的颅脑MR图像结果供分析,采用统计学Ridit分析和χ2检验。结果:使用PROP-T2WI和SSFSE-T2WI扫描方法所获得的图像运动伪影均明显减少,颅内病灶均可以显示(Ridit分析,P=0.6664);但PROP-T2WI图像的清晰度、对比度明显优于SSFSE-T2WI图像(χ2检验,P<0.001)。结论:PROPELLER和SSFSE扫描技术具有同等消除磁共振图像运动伪影的能力,但使用PROPELLER技术所得到T2WI对脑实质的显示更为理想,显示病灶较清晰,具有较高临床实用价值。
Objective： To evaluate the effects of PROPELLER and SSFSE on brain imaging of unsedated subjects. Methods： PROP T2-weighted fast spin-echo （FSE） imaging （TR/TE/NEX, 4000/83/1.5 ; imaging time, 95 seconds） and T2-weighted single-shot FSE （SS-FSE） imaging （2000/90/0.54; imaging time, 37 seconds） were performed in 25 subjects who were undergoing brain MR imaging. Observers assessed unlabelled images for motion artifact, visibility of pathology, and the preferred image overall. Sequences were compared by using the Ridit test, χ^2 test and concordant data from observers.Results：Both PROP and the SS-FSE imaging offered equal degrees of motion correction （ P = 0. 6664, Ridit test）. Pathology was present in 21 subjects and equally well seen on PROP and SS-FSE images. Overall, PROP was preferred, largely because of its improvements in image contrast （ P 〈 0.001, χ^2 test ）. Conclusion： PROP and SS- FSE imaging provide equal motion correction, although PROP enables better assessment of the brain parenchyma.
出处
《医学影像学杂志》
2007年第4期333-336,共4页
Journal of Medical Imaging
