CT Scan Types, Medical Uses & Adverse effects

CT Scan:

CT scanA CT(computed tomography)scan is a computer-processed combination of many X-ray images taken from different angles to produce cross-sectional images of specific areas of a scanned object, allowing to see inside the object without cutting.

Types of CT scan machines

CT scan technology is evolving constantly which bring the even better quality of the picture. Newer CT scans called "spiral" or "helical" CT scans can provide more rapid and accurate visualization of the internal organs.
High-resolution CT scans (HRCT) are often used to accurately assess the lungs for inflammation and scarring.
In multislice CT (MSCT) scan, a higher number of tomographic slices allow for higher-resolution imaging.

Medical use of CT scan

Medical use of CT scanCT has become an important tool in medical imaging to supplement X-ray sand medical ultrasonography. It has more recently been used for preventive medicine or screening for disease, for example, CT colonography for a high risk of colon cancer, or full-motion heart scans for high risk of heart disease of the people.

Head
CT scanning of the head is commonly used to detect infarction, hemorrhage, tumors, calcifications, and bone trauma.

Lungs
CT scan used for detecting both acute and chronic changes in lung parenchyma, which is, the internals of lungs. A variety of techniques is used, depending on the suspected abnormality.

Pulmonary angiogram
CT pulmonary angiogram is a medical diagnostic test used to diagnose pulmonary embolism. It employs computed tomography and an iodine predicated contrast agent to obtain an image of the pulmonary arteries.

Cardiac
Allowing excellent imaging of the coronary arteries.

Abdominal and pelvic
CT scan is the accurate technique for diagnosis of abdominal diseases. It's can diagnosis and staging of cancer, as well as follow-up after cancer treatment. It is very commonly used to investigate the acute abdominal pain.

Extremities
CT scan is often used to image complex fractures. Fractures, ligamentous injuries, and the dislocations can easily be recognized with a 0.2 mm resolution.

Adverse effects of CT scan

Cancer
The radiation used in CT scans can damage the body cells, including DNA molecules, which may lead to cancer. Compared to the lowest dose x-ray techniques, CT scans can have 100 to 1,000 times higher than conventional X-rays.

Contrast
CT scans involve intravenously injected radiocontrast agents. The most common reactions are nausea, vomiting, and an itching rash.