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Flashcards in Radiographic Terms Deck (39)
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ANODE

"Target"
- positive electrode
- receives electrons

1

AUTOMATIC COLLIMATION

(PBL)- positive beam limitation
-constricts beam
-when using cassette, sensors sense size of cassette and collocates down

2

BLUR

"Image blur" "penumbra"
-unsharpness
-checking trabecular pattern

3

BUCKY

Device that holds cassette in table

4

CASSETTE

Film screen- silver bromide crystals->black metallic silver
-rare earth phosphors light up
CR- imaging plate
-barium fluoro halide

5

CATHODE

"Filament"
Negative electrode
-lights up to incandescence
-forms space charge called "cloud of electrons"

6

CONTRAST

Differences in density
Short scale (high contrast)-whites/blacks , no grays.
Long scale (low contrast)-
More grays, whites/blacks

7

DENSITY

Overall blackening of image

8

DISTORTION

Misrepresentation of image
-size or shape

9

IMAGE RECEPTOR

Anything that receives image
-image intensifier
-film screen cassette
-I.p.- imaging plate

10

FOCAL SPOT

Where electrons hit anode
-small focal spot- sharper image
Steeper angle= smaller degree= focal spot

11

GRID

Absorbs scatter
-image quality device
-not a radiation protection device
-need more radiation because has to go through lead plate

12

INTENSIFYING SCREEN

Light up during exposure
-rare earth phosphors
-95% light 5% X-ray

13

KVP

Quality
-beam penetration controls contrast

14

LEAD APRONS

Secondary barrier
-used during fluoro

15

MAS

Quantity
-# of photons
-controls density

16

OID

"OFD"
Object-image distance
-low oid= increased sharpness

17

AUTOMATIC PROCESSOR

4 tanks-
-developer-changes latent image to manifest
-fixer-hardens emulsion, gets rid of unexposed silver bromide crystals
-wash- washes off excess chemicals
-dry

18

LASER PRINTER

Makes Hard copies of xrays from digital

19

RADIOGRAPH

X-ray image after exposed and processed
- legal record used in court cases
Ensure:
1. Image quality
2. Verify identity
3. Left/right markers are correct

20

RADIOGRAPHIC POSITION

Specific position of body or part in relation to table or image receptor

21

RADIOGRAPHIC VIEW

Image
-how body part is seen on on X-ray view

22

RECORDED DETAIL

Sharpness- definition/resolution
-how clear the boundary of image is.

23

SID

(FFD) -source image distance
-anode to image receptor

24

SOD

FOD
-source to object distance
-between anode to patient

25

CR

-computed radiography
-using cassette with imaging plate-barium fluoro halide phosphors.
Put in image reader, laser scans image.

26

CRT

Cathode Ray tube-
Monitor that brings up image

27

DICOM

Digital Imaging Communicating Medicine

-Software used for blending modalities

28

DR

Digital radiography
-uses detectors
-selenium/silicon
Silicon uses scintillator

29

HIS

Hospital info system