Radiographic Terms

Question 0

AUTOMATIC COLLIMATION

Answer 0

(PBL)- positive beam limitation

• constricts beam
• when using cassette, sensors sense size of cassette and collocates down

Question 1

ANODE

Answer 1

“Target”

• positive electrode
• receives electrons

Question 2

BLUR

Answer 2

“Image blur” “penumbra”

• unsharpness
• checking trabecular pattern

Question 3

BUCKY

Answer 3

Device that holds cassette in table

Question 4

CASSETTE

Answer 4

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

Question 5

CATHODE

Answer 5

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

Question 6

CONTRAST

Answer 6

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

Question 7

DENSITY

Answer 7

Overall blackening of image

Question 8

DISTORTION

Answer 8

Misrepresentation of image

-size or shape

Question 9

IMAGE RECEPTOR

Answer 9

Anything that receives image

• image intensifier
• film screen cassette
• I.p.- imaging plate

Question 10

FOCAL SPOT

Answer 10

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

Question 11

GRID

Answer 11

Absorbs scatter

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

Question 12

INTENSIFYING SCREEN

Answer 12

Light up during exposure

• rare earth phosphors
• 95% light 5% X-ray

Question 13

KVP

Answer 13

Quality

-beam penetration controls contrast

Question 14

LEAD APRONS

Answer 14

Secondary barrier

-used during fluoro

Question 15

MAS

Answer 15

Quantity

• # of photons
• controls density

Question 16

OID

Answer 16

“OFD”
Object-image distance
-low oid= increased sharpness

Question 17

AUTOMATIC PROCESSOR

Answer 17

4 tanks-

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

Question 18

LASER PRINTER

Answer 18

Makes Hard copies of xrays from digital

Question 19

RADIOGRAPH

Answer 19

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

Question 20

RADIOGRAPHIC POSITION

Answer 20

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

Question 21

RADIOGRAPHIC VIEW

Answer 21

Image

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

Question 22

RECORDED DETAIL

Answer 22

Sharpness- definition/resolution

-how clear the boundary of image is.

Question 23

SID

Answer 23

(FFD) -source image distance

-anode to image receptor

Question 24

SOD

Answer 24

FOD

• source to object distance
• between anode to patient

Question 25

CR

Answer 25

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

Question 26

CRT

Answer 26

Cathode Ray tube-

Monitor that brings up image

Question 27

DICOM

Answer 27

Digital Imaging Communicating Medicine

-Software used for blending modalities

Question 28

DR

Answer 28

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

Question 29

HIS

Answer 29

Hospital info system

Question 30

HISTOGRAM

Answer 30

Graphic display of distribution of pixels

Question 31

PACS

Answer 31

Picture archiving communication system

- network to transfer images

Question 32

PIXEL

Answer 32

Boxes of data

-smallest component of matrix

Question 33

REMNANT BEAM

Answer 33

(Exit radiation)-leftover radiation

• X-ray beam that exits patient
• made up of image forming rays that hit I.R. (Image reader)

Question 34

RIS

Answer 34

Radiology info system

-use for EDE

Question 35

VOXEL

Answer 35

3-dimensional pixel
-volume element
-used in CT/MRI/3d ultrasound
-

Question 36

WINDOW LEVEL

Answer 36

Adjusting density (post parameters)
-after image is in comp

Question 37

WINDOW WIDTH

Answer 37

Adjusting contrast-after image is on comp

Question 38

MAGNIFICATION

Answer 38

SID-FFD
OID-OFD
SOD-FOD
-more KV =less magnification