How do I study in CT?

How do I study in CT?

Examine the brain for:

1. Symmetry – make sure sulci and gyri appear the same on both sides.
2. Grey-white differentiation – the earliest sign of a CVA on CT scan is the loss of the grey-white interface on CT scan.
3. Shift – the falx should be in the midline with ventricles the same on both sides.

What is the basic principle of CT scan?

CT is based on the fundamental principle that the density of the tissue passed by the x-ray beam can be measured from the calculation of the attenuation coefficient.

How do you describe CT findings?

The appearance of tissues on a CT scan is described in terms of ‘density’. Darker structures are ‘hypodense or low density’; brighter structures are ‘hyperdense or high density’. Blood Can Be Very Bad is a mnemonic that can be used when faced with interpreting a CT head scan: Blood.

What is black on CT scan?

Air appears black. With CT scanning, several x-ray beams and electronic x-ray detectors rotate around you. These measure the amount of radiation being absorbed throughout your body. Sometimes, the exam table will move during the scan.

How do you read a CT report?

To read a CT scan, start by noting the shades of white, gray, and black. The white area signals dense tissues like bone, the gray area represents soft tissues and fluids, and the dark gray and black area shows air and fat.

What is a CT a P?

Computed tomography arterial portography (CTAP) is a useful method based on portal enhancement of the liver by infusion of contrast material through the superior mesenteric artery for evaluating the portal venous system (12–15) and is widely used in patients with hepatic tumors with portal venous invasion (13, 16, 17).

What are kernels in CT?

The kernel, also known as a convolution algorithm, refers to the process used to modify the frequency contents of projection data prior to back projection during image reconstruction in a CT scanner 1. This process corrects the image by reducing blurring 1.

What is bright on CT?

Tissues like air and water have little attenuation and are displayed as low densities (dark), whereas bone has high attenuation and is displayed as high density (bright) on CT. Among pathologic conditions, high density lesions are often seen with freshly clotted blood, hyperemia and with the use of contrast.

What are the types of CT scan?

CT Angiography. CT Scan Arthrography. CT Scan Bones. CT Scan Brain/ CT Scan Head.

What is hyperdense on CT?

Hyperdense. Hyperdense (more dense): If an abnormality is bright (white) on CT , we describe it as hyperdense.

What is axial view in CT?

CT scans use X-rays, radiation detectors and computers to produce images or “slices” through the body. In most cases, the images are in the axial plane — a view looking down through the body. Called the coronal plane, this is similar to the way an X-ray looks.