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Radiology Terms and Abbreviations

Radiographic View

Describes the body part as seen by the x ray film or other recording medium, such as a fluoroscopic screen. (Radiograph or image)

Radiograph Position

Refers to a specific body position, such as supine (face up), prone (face down), erect (on side), or recumbent.

Radiographic Projection

The path of the central ray

Supine

lying on one's back

Prone

lying face downward

Decubitus

lying on a lateral side with tube in horizontal position.

Recumbent

lie back

Anterior position

facing the film/image receptor

Posterior position

facing the x ray tube

Oblique (Obl) position

angled towards the film/image receptor

RAO View

right anterior oblique (right angled to film)

LPO View

left posterior oblique (left angled to film)

AP Projection

antero-posterior, where central ray enters the anterior side and exits the posterior side

PA Projection

postero-anterior, where central ray enters the posterior side and exits the anterior side.

Medial

part of a structure lying nearest midline

Lateral

part of a structure lying farthest away from midline

Cephalad

towards the head (central ray angled towards the head)

Caudad

towards the tail end (central ray angled towards the feet)

Palmar

front or palm of the hand

Plantar

sole of the foot

Proximal

part of the structure closest to the origin

Distal

part farthest away from the origin

Lateral

single side view of the body

Bilateral

both sides of the body

Internal

turning inward

External

turning outward

Respiration

act of breathing

Inspiration

holding one's breath (e.g., Chest)

Expiraton

exhaling (e.g., Abdomen)

X-ray beam

x rays leaving the tube, forming a cone shaped beam

Field of view

area where the x ray beam is directed for imaging

Central ray (CR)

imaginary line in the center of x ray beam, perpendicular to the object being imaged.

kVp

kilovoltage, peak (maximum amount of energy)

mAs

milliamperage x's seconds (time)

Imaged

synonymous with term x rayed

Radiographs

x ray image

Exposure

act of taking a radiograph (taking an x-ray)

Cassette

holder for radiographic film and screens

Bucky

metal tray holding cassettes, mounted under the tabletop

Upright Chest Board

Bucky in an upright position, used mainly for chest x rays

Tabletop (TT)

defines a location where to place cassettes

Midline

center line drawn on tabletop or on upright chest board

SID

source to image receptor distance

OID

object to image receptor distance

AOI

area of interest (target, field of view)

Lead markers

markers made of lead and placed on outside of cassettes to indicate positioning (Rt./Lt.), times, and tech initials

I.D. blocker

area on the cassette reserved for patient information

Centimeter stick/Caliper

aluminum, L shaped measuring stick in centimeters

Technique

factors used for the exposure: mA, time, kVp, distance, and focal spot size

Technique chart

chart that contains exposure factors according to body part (chest), part thickness (cm), and technical factors

Focal spot (FS)

selection on control panel to decide on x ray beam's size

Artifacts

unwanted marks on a radiograph

Standard distances

40 inches (102 cm) or 72 inches (183 cm)

Effective dose limits (E)

replaces the term "maximum permissible dose"

LW or CW

symbols for cassette placement, length wise or cross wise

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