Rad tech exam 1

Radiograph

an image of patients anatomy, as produced by the action of x-rays on an IR

central ray

center-most point of the x-ray beam

x-ray

photon energy created from electrons striking the anode used to produce an image

position

indicates the patients general physical position (body)

projection

indicates the path of the central ray (beam)

supine

lying on back, facing up

prone

lying on stomach, facing down

erect

upright position

recumbent

lying down in any position

dorsal, ventral, and lateral

trendelenburg

head lower than feet

fowler

head higher than feet

sims position

recumbent, lying on left anterior side, right knee flexed and left arm extended behind back

lithotomy

recumbent position knees and thighs abducted and rotated externally

lateral position

side view, side of body closest to the IR

oblique position

neither sagittal or coronal plane is closest the IR, angled

posterior oblique position

posterior side of the body is closest to the IR

anterior oblique positions

anterior side is closest to IR

decubitus position

horizontal surface, side that body is resting

tangential projection

describes CR that skims body part (knee cap)

Three major parts of evaluation criteria

anatomy demonstrated, position, exposure

anatomy demonstrated

describes precisely what anatomic parts and structures should be clearly visualized on that image

four general evaluations for position

1. placement of body part in relationship to the IR

2. positioning factors that are important for the projection

3. correct centering anatomy

4. collimation

exposure

how exposure techniques can be evaluated for optimum exposure

general rules in diagnostic radiology

1. minimum of two projections taken 90 degrees from each other

   1. superimposition, localization, determination

2. All radiographic procedures of the skeletal system and joints require a minimum of three projections (AP/PA, oblique, and lateral)