MDCT angiografie věnčitých tepen šestnáctidetektorovým výpočetním tomografem - Principy a první klinické zkušenosti

Multi-row-detector CT angiography uses synchronized raw data acquisition with ECG curve. Only a part of data set in diastolic phase is used for reconstruction of images with temporal resolution up to 105 ms. The axial images and 3D-reconstructions of coronary vessels are evaluated. The most important disadvantage is a relativelly low temporal resolution, CTA coultn't be used for patients with the heart rate over 85 bpm and for patients with arythmia. Fine branches of coronary tree on lateral and lower wall isn't displayed very well in all patients. Although this unique method has a limitation in comparison to catheterization coronarography, it is the first step to noninvasive coronary imaging. Authors report about a group of 30 patients with different coronary vessel pathology who underwent examination on sixteen-row-detector equipment Somatom Sensation 16 (Siemens, Forchheim, Germany) using a rotation period of 420 ms.