Lipton M J, Higgins C B
Radiol Clin North Am. 1980 Dec;18(3):557-76.
As the technology of CTT advances in speed and resolution, a new clinical applications of this modality for noninvasive evaluation of ischemic heart disease should emerge. This modality has already advanced to the stage at which it can compete with echocardiography in producing static images of cardiac structures. The ability of CTT to quantitate regional blood flow using dynamic densitometry is a unique capability of this modality. Although cardiac scintigraphy provides excellent density sensitivity using small amounts of radioactive tracers, it currently lacks the spatial fidelity needed to differentiate many anatomic structures in the heart. Thus, CTT will likely complement the capabilities of other noninvasive imaging modalities. In the future, ultra high-speed CTT scanners will be developed that should provide a multi-section capacity for true three-dimensional imaging. Such scanners will enable many of the cardiac CTT techniques described in this article to advance from the experimental laboratory stage into the mainstream of clinical practice.
随着CTT技术在速度和分辨率方面的进步，这种成像方式在缺血性心脏病无创评估中的新临床应用将会出现。这种成像方式已经发展到能够在生成心脏结构静态图像方面与超声心动图相媲美的阶段。CTT利用动态密度测定法定量局部血流的能力是这种成像方式的独特优势。尽管心脏闪烁扫描术使用少量放射性示踪剂就能提供出色的密度敏感性，但目前它缺乏区分心脏中许多解剖结构所需的空间保真度。因此，CTT可能会补充其他无创成像方式的功能。未来，将会开发出超高速CTT扫描仪，应该能够提供多层面能力以实现真正的三维成像。这样的扫描仪将使本文所述的许多心脏CTT技术从实验阶段进入临床实践主流。
