In medical imaging, resolution is the ability to distinguish two adjacent objects and a measurement of image quality. The resolution of tomographic images is a function of slice thickness, field of view (FOV) and matrix size. The resolution in plane is a function of FOV / matrix size.

Scattered radiation is caused by interaction of the primary radiation with matter. The interaction with matter could cause a change in direction (scattering) and a reduction in energy.
From a radiation protection point of view, scattered radiation is assumed to come primarily from interactions of primary radiation with tissues of the patient.

In a supervised area, working conditions are kept under review but special procedures to control exposure to ionizing radiation are not normally necessary.

See also Controlled Area.

Virtual colonoscopy provides a less invasive option to conventional polyp detection in the large intestine (colon and rectum). A virtual colonoscopy is a synthesis of a computed tomography (CT) scan, digital processing and virtual reality computer software.
A virtual colonoscopy is less invasive and more comfortable for patients than either conventional colonoscopy or a barium enema. No sedation is required and the examination takes less than 30 minutes.
A CT colonography offers a new option for a total colon evaluation and cancer detection and has the potential to be used for screening. A problem is the amount of information captured in a CT exam. Reviewing these images can be time-consuming and challenging.

See also Computed Tomography Enterography.

A zoom reconstruction is the enlarged reconstruction of a part of an image. A zoom reconstruction uses the raw data of a scan. Zooming or targeting requires the operator to manipulate the displayed field of view.