CT angiography is a type of medical test that combines a CT scan with an injection of a special dye to produce pictures of blood vessels and tissues in a part of your body. The dye is injected through an intravenous (IV) line started in your arm or hand. A computerized tomography scan, or CT scan, is a type of X-ray that uses a computer to make By Perrine Juillion / November 21, 2019. Our study showed that CT images with slice thickness of Cardiac CT is one of the most useful techniques in evaluating the origin and course of anomalous coronary arteries. It is very important in determining the relationship of the coronary artery to the aorta and the pulmonary artery. It can also detect aneurysm of the pulmonary artery (below) and of the aorta. The pulmonary artery is dilated and
The resulting maximum scan speed for 128-slice DSCT is 458 mm/s and even 737 mm/s for 192-slice DSCT. At the maximum pitch, this scan mode delivers a temporal resolution of ~rotation time/4 since no redundant data are acquired. Lowering the pitch also lowers the temporal resolution.
Based on the historic evolution of CT and basic CT physics this chapter describes the status quo of the technology and tries to anticipate future developments. Besides the description of key components of CT systems, a special focus is laid on breakthrough developments such as multi-slice CT and dedicated scan modes for cardiac imaging.Raw CT datasets were acquired from two different scanners in our institution: a 192-slice CT scanner with a maximum spatial resolution of 0.24 × 0.24 mm 2 (Somatom Force, Siemens Healthineers, Forchheim, Germany) and a 128-slice CT scanner with a maximum spatial resolution of 0.3 × 0.3 mm 2 (Somatom Edge Plus, also Siemens Healthineers). The Phantom Testing: CT (Revised 11-9-2022) The Gammex 464 phantom can be scanned either by a technologist or medical physicist. If performed by a technologist, it is strongly recommended that a physicist check all images and data forms before submission. A medical physicist must perform the dosimetry scans. The dosimetry scans can be done on a Figure 1b shows reconstructed images from the 128-slice DSCT and 320-row ADCT scanners. The impulse signal of the respective acquisition modes (SHM and DHM) for the 128-slice DSCT appeared as one- and two-streak responses. On the other hand, the 320-row ADCT image appeared as only a one-streak response in the respective reconstructed CT image. TheL94N5n.
