Thus, CT contributes a significant portion of the total collective dose from ionizing radiation delivered to the public from medical procedures. It is important, therefore, that physicians ordering or performing these examinations have an understanding of the dose delivered from a cardiac CT, as well...
MRI (magnetic resonance imaging)—A noninvasive, sophisticated imaging procedure that uses large magnets and a computer to produce detailed images of organs and structures inside the body. CT scan (computed tomography scan)—An imaging procedure that uses X-rays and computer technology to produce cr...
PURPOSE To evaluate the relationship between heart rate and phase window in dual-source CT (DSCT) coronary angiography with regard to the effective reduction of radiation dose. METHOD AND MATERIALS A lung phantom (RS-330) with insertion of left coronary artery was scanned in the heart DEMO mode...
CT scan parameters and radiation dose: practical advice for radiologists. J Am Coll Radiol. 2013;10:840–6. Article PubMed Google Scholar Goo HW. Image quality and radiation dose of high-pitch dual-source spiral cardiothoracic computed tomography in young children with congenital heart disease: ...
Injured patients could have a full body CT scan in less than a minute. Theprocedure would have taken hours in the case of the first scanners. The Brilliance CT machine generates pictures by passing X-rays, that last onlya few milliseconds, through the patient.. As it scans the body, ...
Cardiac CT Scan • What it is: 3-D X-ray imaging that can detect calcium buildup in coronary arteries. • Why avoid it? Even if nothing's wrong, a suspicious sighting or a poor-quality scan will require an invasive procedure to clear up questions. A recent study of 2,000 patients...
Compared with dynamic CT approaches, DECT has advantages regarding radiation dose and clinical applicability. In this review, the literature on DECT of the heart is discussed.关键词: dual-energy CT dual-source CT ischemia myocardial infarction myocardial viability ...
Electrocardiographic-gated cardiac CT Radionuclide ventriculography Multigated acquisition scan ( radionuclide ventriculography ):[2,25] Most accurate way to assess ejection fraction , but rarely performed Exposes the individual to ionizing radiation Useful in those with significant wall abnormalities or...
The aim of this medical image science project is to increase patient safety in terms of improved image quality and reduced exposure to ionizing radiation in CT. The means to achieve these goals is to develop and evaluate an efficient adaptive filtering (denoising/image enhancement) method that ful...
Heart Rate Variation and Radiation Dose of Coronary Artery Angiography with 640-slice CT System CONCLUSION Heart rate control is an important component of 640-slice CT dose reduction. Mean heart rate during scan acquisition was significantly lower than mean heart rate on prescan. This in an importa...