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diangnostic imaging

key terms

TermDefinition
ALARA as low as reasonably attainable
ANECHOIC describes the tissue that transmits all sounds to deeper tissues
ANNULAR ARRAY arranges the crystals in concentric rings
ANODE the positively charged electrode by which the electrons leave a device
BUCKY A Bucky is a component of x-ray units that holds the x-ray film cassette and moves the grid during x-ray exposure
CATHODE contains a tungsten filament and when heated electrons are generated
COLLIMATORS adjustable lead shutters in the tube head of the x-ray machine
CONTRAST the state of being strikingly different from something else in close association
DIRECT EXPOSURE FILM more sensitive to direct x-rays than it is to light
DISTANCE ENHANCEMENT when beams traverse a cystic structure
ECHOIC most of the sound is reflected back to the transducer
FILM LATITUDE the recording capability of x-ray film
FILM-FOCAL DISTANCE the distance between the center of the anode of the x-ray tube
FFD distance between the source of the x-ray and the film
FLUROSCOPY for patients who prioritize the visualization of dynamic structures
FOCUSED GRIDS lead strips placed at certain angles to match the divergence of the x-ray beam
HEEL EFFECT the result of unequal distribution of the x-ray beam
HYPERECHOIC describes tissues that reflect more sound back to the transducer than surrounding tissues
HYPOECHOIC describes tissues that reflect less sound back to the transducer than surrounding tissues
INTENSIFYING SCREENS fluorescent crystals bound to a cardboard or plastic base
ISOECHOIC Producing ultrasound echoes equal to those of neighboring or of normal tissues.
KVP refers to the maximum high voltage applied across an X-ray tube during the creation of x-rays within it.
LATENT IMAGE invisible product of x-ray or photographic film emulsions, build after radiation or light exposure.
MPD the upper limit of allowed radiation dose that one may receive without the risk of significant side effects
mA a measure of radiation produced over a set amount of time (seconds) via an x-ray tube
MIRROR IMAGE allows the sonographer to exclude pleural effusion by the reflection of the liver image through the diaphragm
OFD he distance between the object being radiographed and the x-ray film
PENUMBRA EFFECT used to describe the unsharpness, or blur, produced by x-ray tube focal spots
RADIOGRAPHIC DENSITY is a measure of the degree of film darkening
RADIOLUCENT Permeable to one or another form of radiation, such as X-rays.
RADIOPAQUE block radiation rather than allow it to pass through
REM the dosage in rads that will cause the same amount of biological injury as one rad of X rays or gamma rays.
SV a measure of the health effect of low levels of ionizing radiation on the human body
SLICE THICKNESS refers to the resolution of the scan
SONOLUCENT a radiologic technique in which deep structures of the body are visualized by recording the reflections of ultrasonic waves directed into the tissues.
ULTRASOUNOGRAPHY an imaging technology that uses high-frequency sound waves to characterize tissue
SID the distance between the source of photons (anode) and the image receptor
THORAX the part of the body of a mammal between the neck and the abdomen
ABDOMEN the part of the body of a vertebrate containing the digestive organs; the belly
XYPHOID the cartilaginous section at the lower end of the sternum, which is not attached to any ribs, and gradually ossifies during adult life.
THORACIC INLET the opening at the top of the thoracic cavity
AXILLARY underarm
INGUINAL the groin
VENTRAL body area situated toward the back
DORSAL body area situated toward the median plane
MEDIAL body area situated toward
LATERAL body area situated away from the median plane or mid-line
CRANIAL structures or areas situated toward the head
CAUDAL structures or areas situated toward the tail
ROSTRAL areas on the head situated situated toward the nose
PALMAR situated on the caudal aspect of the front limb
PLANTAR situated on the caudal aspect of the rear limb
DISTAL situated away from the point of attachment or origin
PROXIMAL situated closer to the point of attachment or origin
Created by: mermaid1!
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