By U. Joseph Schoepf
Prime clinicians and researchers from around the globe evaluate the total scope of present advancements, study, and medical controversy concerning the ideas and purposes of cardiac CT. Richly illustrated with various black-and-white and colour photographs, the publication discusses the translation of CT photographs of the guts in numerous medical, physiological, and pathological purposes. The authors emphasize present state of the art makes use of of CT, but additionally research advancements on the horizon. in addition they assessment the technical foundation of CT picture acquisition, in addition to instruments for photograph visualization and research.
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Best clinicians and researchers from world wide evaluate the whole scope of present advancements, examine, and clinical controversy concerning the ideas and purposes of cardiac CT. Richly illustrated with various black-and-white and colour photographs, the publication discusses the translation of CT photos of the guts in a number of medical, physiological, and pathological functions.
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Additional info for CT of the Heart Principles and Applications
Usually the diastolic phase of the cardiac cycle is chosen for image reconstruction of cardiac and coronary morphology; however, owing to the highly overlapping scan acquisition, image data can be reconstructed for each x, y, and z position within the scanned volume over the entire course of the cardiac cycle. This allows for retrospective selection of phases for reconstruction that provide the best image quality for anatomy with special motion patterns in individual patients (26,27). To improve image quality in the presence of arrhythmia, selected image stacks can either be discarded or arbitrarily shifted within the cardiac cycle, so that reconstruction always coincides with the same interval during diastole at each level of the cardiac volume.
Both lesions are confirmed by coronary angiography (case courtesy of Dr. C. S. Soo, HSC Medical Center, Kuala Lumpur, Malaysia). Fig. 10. Coronary CT angiography examination of a patient who presented with chest pain in the emergency room, using a 16-slice CT scanner. 6-mm reconstructed slice width, 400-ms rotation speed, 12-cm scan range covered in 32 s (Aquillion 16, Toshiba). Visualization with maximum intensity projection reveals a significant amount of noncalcified plaque and moderate lumen narrowing in the proximal left descending coronary artery (A, arrow) and a high-grade lumen obstruction in the right coronary artery (B, double arrow) (case courtesy of Dr.
Recent independent studies found interscan variability of about 10% or less for repeat 4-slice CT scanning (31,47,48), which may be accurate enough to detect significant changes in the total atherosclerotic disease burden in patients with and without specific therapy. Interscan variability may be further improved with the latest 16-slice CT scanners, primarily based on faster rotation time and increased scan speed (Fig. 7). In comparison to prospectively ECG-triggered technique, the drawback to using retrospective ECG gating is higher patient dose.
CT of the Heart Principles and Applications by U. Joseph Schoepf