ECG-gated 3D-rotational coronary angiography (3DRCA)
To investigate the feasibility of 3D-RCA for high-spatially resolved 3D reconstruction and visualization of the coronary arteries in the pig model. Two-dimensional projections of the coronary artery tree were acquired during rotation of the X-ray fluoroscopy system (INTEGRIS V3000, Philips Medical Sytems, Best, The Netherlands) around a pig. The pigs were anaesthetized and under mechanical respiratory support with heart rates between 75 and 102 bpm. Data acquisition was performed over an angular range of 180° during continuous injection of Iodine (300mg/ml) through a catheter introduced to the ostium of either the left or the right coronary artery tree. To ensure constant filling of the artery tree, the injection of contrast was started slightly before starting the scan. After the data acquisition, a gated reconstruction was performed. Volume reconstructions at isotropic spatial resolution down to 250μm were performed using a gating window of 20 or 40ms length. By moving the gating window over the cardiac a multi-phase reconstruction of the coronary arteries could be provided, yielding a temporally resolved impression of the coronary artery tree. Volumes reconstructed from data obtained during diastole provide a clear visualization of the coronary artery tree including proximal, medial and distal parts. The feasibility of 3D-RCA could be shown in the animal model. The excellent results imply that data acquired over a single rotational run can provide high quality morphological three-dimensional information of the coronary arteries in the catheter laboratory.
Keywords3D coronary angiography 3D-rotational angiography X-ray angiography
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