The apparatus for generating a tomogram, a two-dimensional image of a slice or section through a three-dimensional object. The tomograph achieves this remarkable feat by simply moving an x-ray source in one direction as the x-ray film is moved in the opposite direction during the exposure to sharpen structures in the focal plane, while structures in other planes appear blurred.
The tomogram is the picture; the tomograph is the apparatus; and tomography is the process.
Computed tomography (CT); Computed tomography colography; Computerized axial tomography scan (CAT scan); Electron beam computerized tomography (EBCT); Positron emission tomography (PET scan).
- Tomography, computerized axial
Pictures of structures within the body created by a computer that takes the data from multiple X-ray images and turns them in pictures. The CAT (computerized axial tomography) scan can reveal some soft-tissue and other structures that cannot be seen in conventional X-rays. Using the same dosage of radiation as that of an ordinary X-ray […]
- Tone deafness
The inability to recognize musical tones or reproduce them. Also called amusia.
A strong muscle that is anchored to the floor of the mouth. The tongue is covered by the lingual membrane, which has special areas to detect different types of tastes. The tongue muscles are attached to the lower jaw and to the hyoid bone, a small, U-shaped bone that lies deep in the muscles at […]
- Tongue cancer
Malignancy of the tongue; squamous cell carcinoma of the tongue. Risk factors include smoking tobacco, smokeless tobacco, heavy alcohol intake, and dentures. Tongue cancer usually occurs after the age of 40, with men affected more than women. Tongue cancer is divided into that on the anterior tongue and that at the base of the tongue. […]