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SPECT心肌灌注显像(myocardial perfusion imaging,MPI)是核心脏病学的重要组成部分,其可以为临床治疗方案的确定提供充分的理论依据,同时还可以对疗效及预后作出准确的判断[1]。但其诊断的准确率还不能完全令人满意,最常见的原因为软组织衰减所导致的衰减伪影。对于常见伪影,可以通过非X射线衰减校正法和CT衰减校正法进行校正。本文就MPI的常见伪影以及伪影的校正方法进行综述。
衰减校正技术在SPECT心肌灌注显像中的应用分析
Application analysis of attenuation correction technique in SPECT myocardial perfusion imaging
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摘要: 心肌灌注显像(MPI)的伪影对其图像质量以及图像的判别产生较大影响,造成假阳性率较高。目前针对软组织衰减所造成的伪影主要有以下2类校正技术,非X射线校正法(如变换体位采集、门控采集和固体153Gd线源穿透式采集)和CT衰减校正法。明确2种方法的应用范围及其优缺点,使临床医师在阅片中对伪影有正确的分析判断,从而提高诊断的准确率。
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关键词:
- 心肌灌注显像 /
- 体层摄影术,发射型计算机,单光子 /
- 衰减校正 /
- 伪影
Abstract: Artifacts of myocardial perfusion imaging, greatly influence on the image quality and image discrimination, resulting in a high false-positive rate. Many techniques have been developed for correcting various artifacts, including non-X-ray attenuation correction method (such as change-position acquisition, gated acquisition and solid 153Gd line-source penetration acquisition) and CT attenuation correction method. Clarify the application scope and advantages and disadvantages of the two methods, so that the clinician can correctly analyze and judge the artifacts in the reading, thereby improving the accuracy of diagnosis. -
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