standardized uptake values (SUV)

standardized uptake values (SUV) Positron emission tomography (PET) has become a widely utilized functional imaging modality. The combination of x-ray computed tomography (CT) with PET gives both structural and functional information from a single two part scan as...

X-ray Dose measurement

X-ray Dose measurement In this section we briefly review different definitions, units, and measurement methods of X-ray dose in CT imaging. Dose is a general term used to quantify how much radiation exposure aperson (or other material) has received. Radiation dose...

Generation of CT(Computed Tomography) scanners

First Generation The first generation CT scanners consisted of a dedicated head scanner with a water filled box. Pencil-width collimated beams of X-ray were used and these were detected on the opposite side using a single detector. The width of the X-ray beam was 3 mm...

Computed Tomography (CT)

Computed Tomography (CT) X-ray Computed Tomography (CT) is a medical imaging technique that enables the reconstruction of cross-sections of an object, using a series of X-ray measurements taken from many angles around the object. The first CT scanner was introduced by...