Computed Tomography Imaging or CT

JCA Medicial Seminars covering CT Imaging are held twice a year. Please visit our Upcoming Seminars page for dates and information.

Computed tomography (CT) is a medical imaging technique using x-rays that creates a 3D image of the inside of an object.

In recent years medical usage of CT has grown dramatically, with an estimated 72 million scans performed in the United States in 2007.

Using digital geometry processing, a series of x-rays from a single axis of rotation are processed to form the high-contrast resolution image. Computed tomography data can be manipulated to demonstrate various bodily structures by a process known as "windowing". This is based on a bodily structure's ability to block the X-ray/Röntgen beam. Previously the images generated were in the axial (transverse) plane, orthogonal to the long axis of the body, however modern scanners now allow reformatting of this data in various planes or even as three-dimensional representations of structures.

Computed tomography (CT) has also been known as CAT (computerized Axial Tomography), CTAT (Computerized Transaxial Tomography and DAT (Digital Axial Tomography).