CT Coronary Angiogram (CTA) has become a good non-invasive alternative for imaging the coronary arteries in an increasing number of patients. RadLink operates the Siemens 64-slice CT scanner for CTA.
CTA allows direct visualisation of the coronary artery wall with the administration of intravenous contrast. CTA also has less radiation compared to conventional coronary catherisation angiography. Calcified and soft plaques can be visualised together with the degree of coronary luminal stenosis. CTA is also helpful in low to intermediate risk patients with sub-acute and/or chronic chest pain syndromes.
A CT brain looks at the structures of the brain and is a good and quick modality to evaluate the presence of pathology, such as mass/tumor, fluid collection (like abcesses) and ischemic processes (like stroke). It is particularly good for hemorrhage, trauma or fracture to the skull and for ventricular assessment.
CT Low-Dose Screen is intended to supplement or replace routine CXRs which are performed in patients without symptoms or known diseases. The test is specifically designed to rapidly screen the lungs with minimal radiation exposure, to allow detection of pulmonary nodules. No intravenous contrast is used.
CT Low-Dose Screen /(non-contrast) is also specifically designed to screen for pulmonary nodules, and is neither designed nor intended to screen for abnormalities elsewhere in the thorax (i.e. heart, aorta, lymph nodes, and bones).
A virtual colonoscopy requires no sedation, is minimally invasive and more comfortable than a traditional colonoscopy. It is based on a CT scan of the abdomen and pelvis after the colon has been gently inflated with CO2 from a small enema tip inserted into the rectum.
The images are then post-processed so that the radiologist can 'fly-through' the colon to look for polyps or tumours, even in areas that are potentially difficult to reach via optical colonoscopy. The simultaneous CT acquired also allows for detection of extra-colonic disease in the abdomen and pelvis.
Computed Tomographic Virtual Colonoscopy to Screen for Colorectal Neoplasia in Asymptomatic Adults. NEJM Pickhardt P. J., Choi J. R., Hwang I., Butler J. A., Puckett M. L., Hildebrandt H. A., Wong R. K., Nugent P. A., Mysliwiec P. A., Schindler W. R.