Rt 103 Chapter 1 Flashcards

Medical imaging
Terms Definitions
Image Receptor
Device that receives the energy of the x-ray beam & forms the image of the body part.
5 types of image receptors
-cassette w/ film. -image plate (IP) -solid state detectors. -fluoroscopic screen. - portable digital Radiography
Define Optical density & what is it controlled by?
It is the degree of blackening in the radiographic film. Also known as the brightness when it appeared on a digital display monitor. It is controlled by mAs. Milliampere-second
mAs
Milliampere-second. It affects patient radiation dose & image noise.
Contrast & what is it controlled by?
Difference in densities. Low contrast displays many levels of density. High contrast displays few density levels. It is controlled by Kilovoltage peak (kVp)
Long scale
Low contrast images that display many levels is density
Short scale
High contrast. Very few levels of density.
Recorded detail
The ability to visualize small structures. It shows clearly the desired anatomical part.
Controlling factors of Magnification
Controlling Factors: object-to-image receptor distance (OID) & source-to-image receptor distance (SID).
OID
Object to image receptor distance. Which is how far the body part is from the IR
SID
Source to image receptor distance. Or how far the X-ray tube is from the IR. it's a set.... 40 inches.
Distortion
Misrepresentation of the size & shake of any anatomical structure.
Define Viewbox/ Illuminator
For screen film radiography & a display monitor for digital imaging.
Anatomic Position
Patient standing erect. W/ face, eyes directed forward. Arms extended to the dudes w/ palms facing up, heels together & toes pointing anteriorly.
Lateral radiographs
The patients R or L side placed against the IR. display the radiography so that the side of the patient closest to the IR during the procedure is also the side in the image closet to the Illuminator.
Oblique radiographs
When the patients body is rotated so that the projection obtained is not frontal, posterior, or lateral. Left Anterior Oblique (LAO)
Radiologist assistant (RA)
RA designate radiographer a who provide these advanced clinical services in the diagnostic imaging depart.
Radiology practitioner assistant
(RPA) - designate radiographer who provide advanced clinical services in the diagnostic imaging depart.
Germicides/ Disinfectants
Chemical substances that kill pathogenic bacteria
Disinfection
Process of killing microorganisms that are pathogenic.
Antiseptics
Chemical substances that inhibit the growth of but without killing pathogenic microorganisms.
Sterilization
Means of hear or chemicals. It's the destruction of all micro organisms.
US Centers for Disease Control & Prevention
(CDC) recommendations when handling blood & body fluids. Any procedure... Blood/body fluids....may be sprayed or splashed, the Rad should wear a mask, eyewear & gown. Needles need to be placed in puncture proof container & properly discarded.
Operating Room
Rad should have wash, wear scrub clothing, cap, mask, survey the room setup before bringing in x-ray equipment. The x-ray equipment must be wiped down before taking into the OR
Involuntary muscles
Visceral organ muscles composed of SMOOTH muscular tissue & controlled partially by autonomic nervous system. - heart pulsations, chills, peristalsis, tremor, spasm, pain
Voluntary muscles
Composed of Striated muscular tissue & controlled by the central nervous system. Nervousness, discomfort, excitability, mental illness, fear, age, breathing.
Age specific competency
Knowledge, skill, ability, behaviors that are essential for providing optimal care to defined groups of patients.
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