Nomenclature

Question 1

ADC

Answer 1

Analog to digital converter - converts images to numerical data

Question 2

Automatic collimation

Answer 2

Ability of radiographic equipment to collimate the X-Ray beam to the same size as the image receptor resting in the Bucky tray

Question 3

Blur

Answer 3

Effect of motion on a radiographic image

Question 4

Bucky (Potter Bucky diaphragm)

Answer 4

Moving grid which removes scatter radiation from remnant beam

Question 5

Cassette

Answer 5

Light proof container holding the image receptor

Question 6

Collimator

Answer 6

Boxlike structure containing shutters to limit X-Ray beam to certain areas of the body

Question 7

Computed Radiography (CR)

Answer 7

Digital radiographic imaging using a cassette containing an image plate

Question 8

Contrast

Answer 8

Differences in densities on an image, allows detail to be seen

Question 9

CRT

Answer 9

Cathode ray tube

Question 10

Density

Answer 10

Opaqueness or degree of blackening on an area of the processed image

Question 11

DICOM

Answer 11

Digital imaging and communications in medicine - blending a picture archiving and communications system and various imaging modalities

Question 12

Direct digital radiography (DR)

Answer 12

Uses fixed detectors that directly communicates with a computer

Question 13

Distortion

Answer 13

Misrepresentation of the size or shape of an object as recorded on the radiographic image

Question 14

Exposure indicator

Answer 14

S-number or exposure index that describes the status of the exposure and diagnostic cake of the digital image

Question 15

Film

Answer 15

Film before exposure to radiation

Question 16

Focal spot (focal track)

Answer 16

Area from the anode in an X-Ray tube which from which X-Rays emanate

Question 17

Grid

Answer 17

Device placed between the image receptor and the patient that absorbs scatter radiation exiting the body

Question 18

HIS

Answer 18

Hospital information system

Question 19

Histogram

Answer 19

Graphic display of the distribution of pixel values

Question 20

Image receptor

Answer 20

Any device or medium that captures the remnant beam

Question 21

Imaging plate (IP)

Answer 21

Device that absorbs the photon energies exiting the patient

Question 22

Intensifying screens

Answer 22

Screen that glows when hit with radiation and exposes the film contained in the cassette

Question 23

kVp

Answer 23

Peak kilovoltage applied to the X-Ray table determining the wavelength of the X-Ray beam, it’s ability to penetrate the body, and the overall contrast of the radiographic
Image

Question 24

Lead apron

Answer 24

Lead covering worn by radiographers which absorbs the scatter radiation

Question 25

mAs

Answer 25

Milliampere seconds, current that is passed through the X-Ray tube which is then converted to X-Rays when it strikes the anode. It determines the number of X-Rays produced and the overall darkness of the resulting image

Question 26

Matrix

Answer 26

Digital image made up of rows and columns of data

Question 27

Object-to-image receptor distance (OID)

Answer 27

Distance from part being examined to part detecting the radiation

Question 28

PACS

Answer 28

Picture archiving and communications system

Question 29

Pixel

Answer 29

Picture element, smallest component of a matrix

Question 30

Postprocessing image enhancement

Answer 30

Digital manipulation of a radiographic image after its acquisition by a computer

Question 31

Processor

Answer 31

Machine that develops X-Ray film

Question 32

Radiograph

Answer 32

X-Ray image after it has been exposed and processed

Question 33

Radiographic position

Answer 33

Body position in relation to the table and the image receptor

Question 34

Radiographic projection

Answer 34

Path that the beam takes as it passes through the body

Question 35

Radiographic view

Answer 35

How the image receptor sees the body image

Question 36

Recorded detail

Answer 36

Sharpness of structural lines as recorded on the radiograph

Question 37

Remnant beam (exit radiation)

Answer 37

X-Ray beam that exits the patient

Question 38

RIS

Answer 38

Radiology information system

Question 39

Source-to-image receptor distance (SID)

Answer 39

Distance from source of radiation to the device detecting the radiation

Question 40

Source-to-object distance (SID)

Answer 40

Distance from the source of radiation to the part being examined

Question 41

Voxel

Answer 41

Volume element, section of tissue represented by the pixel

Question 42

Window level

Answer 42

Midpoint of densities in a digital image, used to adjust digital image brightness

Question 43

Window width

Answer 43

Adjusts contrast of the digital image