Intro To Rad FINAL Flashcards
(44 cards)
Fluoroscopy-
Shows dynamics/ internal motion
Static Image-
regular diagnostic image
Dynamic image-
studies in motion
Radiographer assists radiologists and patient by-(5)
-setting up room
-preparing contrast media
-taking scout images
-assisting in procedures
-taking follow up images
R/F system design-
-Fluoroscopic tube below table
-image intensifier or flat panel detector above
-tilt 90/15
-patient placed between fluorotube and image intensifier
Spot film-
Routine pics they screenshot while doing fluoroscope
C-Arm
mobile fluoro unit used in surgery, cath lab, and interventional suites
Radiation Biology-
branch of biological science dealing with the effects of ionizing radiation on living organisms
Radiation Sources-
-Natural:
<cosmic(sun and stars)
<terrestrial (earth elements uranium)
<Body
-Artificial:
<medical and dental x rays
<manmade products(cellphone,powerlines)
Secondary-
produced in atoms of body; byproduct of patient reacting to primary radiation
Exposure Index-
amount of radiation your cassette receives.
Quantom Mottle-
rough and grainy; doesn’t have enough radiation-low mA
Automatic Rescaling-
computer automatically gives you brightness and contrast for good image; bad though since you don’t know if too much IR exposure
Window Width-
contrast (gray scale) an advantage of digital it can be manipulated.
Window level-
brightness; an advantage of digital can be manipulated
3 Cardinal Principles of Radiation Protection-
- Minimize time
-Maximize distance
-maximize shielding
Dosimeter Monitors-
keep track of your radiation exposure; Do not protect you!
Dose equivalent unit-
-in technologist
REM, Sievert Sr(SI)
Absorbed dose unit-
-how much absorbed in patient
-rad, Gray (Gy) (SI)
Task analysis form-
doing job right;judged on how you do job right
legal Technologist Dose-
50 msv (5 rem) per year
Image reader-
-laser converts x-ray photon energy into digital electronic signal to display on workstation.
-cassette erased by light for reuse
Photostimulable Phosphor Plate(PSP)-
replaced film; energy from x-ray beam is trapped
increase sensitivity if-
less specialized, rapidly divide, immature cells0