Chapter 42 Vocab

Cephalostat

Special device that allows the operator to easily position both film and patient.

Computed Tomography

Radiographic technique that allows imaging of one layer or section of the body while blurring images from structures in other planes.

Cone Beam Computed Tomography (CBCT)

Three-dimensional digital imaging method that uses a cone- shaped beam of radiation that rotates around the patient.

Digital panoramic units

Filmless method of recording a panoramic image and displaying it by using an electronic sensor and a computer to process and store the image.

Exposure controls

Feature that allows the operator to adjust the milliamperage and kilovoltage settings.

Extraoral images

Images taken when large areas of the skull or jaw must be examined.

Extraoral imaging

Image of the teeth and bones made by placing the film or cassette against the face or the head and projecting the x- rays from the opposite side.

Field of view

The range of the observable world visible at any given time through the human eye, a camera viewfinder or on a display screen.

Focal trough

Imaginary three-dimensional horseshoe-shaped zone used to focus panoramic radiographs.

Midsagittal plane

Imaginary line that divides the patient's face into equal right and left sides.

Temporomandibular joint (TMJ)

Joint on each side of the head that allows for movement of the mandible.

Three-dimensional digital imaging

The process of creating a three-dimensional image of an object.

Pictograms

A graphic symbol that conveys its meaning through its pictorial resemblance to a physical object.