Physics Rt 34

Front 1

DIRECT RADIOGRAPHY

Back 1

is a way of converting XR's into electrical charges by means of direct readout process

Front 2

COMPUTED RADIOGRAPHY

Back 2

Use storage phosphor image plates w/separate readout image

Front 3

3 WAYS TO PROCESS A DIGITAL IMAGE

Back 3

PHOTOSTIMULABLE PHOSPHOR (PSP)

FLAT PANEL DETECTOR (FPD)

CHARGED COUPLE DEVICE (CCD)

Front 4

WHAT IS THE PROCESS FOR DR?

Back 4

RECORDED DIRECTLY ONTO AN ELECTRICALLY READ DEVICE

Front 5

CASSETTE BASED

Back 5

PHOTOSTIMULABLE PHOSPHOR (PSP)

1. IMAGE IS FORMED BY XR PHOTON EXCITATION OF PHOSPHORS

2. READER RELEASES STORED LIGHT AND CONVERTS IT TO ELECTRICAL SIGNAL

3. ELECTRIC SIGNAL IS READ BY READER THAN DIGITIZED

Front 6

CASSETTE LESS

Back 6

PHOTOCONDUCTOR CONVERTS XR PHOTONS DIRECTLY INTO SIGNALS.

Direct/Indirect Conversion

Flat panel detector (FPD)
Charged couple device (CCD)

Front 7

BARIUM FLUOROHALIDE

Back 7

CASSETTE BASED PSP

Front 8

CASSETTE BASED CR IMAGING PLATE LAYERS

Back 8

1. PROTECTIVE LAYER
2. PHOSPHOR LAYER
3. REFLECTIVE LAYER
4. CONDUCTIVE LAYER
5. SUPPORT LAYER
6. BACKING LAYER

Front 9

PHOTOSTIMULABLE PHOSPHOR

Back 9

STORES ENERGY DEPOSITED BY THE XR BEAM ON PLATE IN CRYSTAL PHOSPHOR CENTER

Front 10

TRANSLATION

Back 10

WHEN LASER SCANS ACROSS IP MULTIPLE TIMES AS IT MOVES THROUGH READER

THIS THEN RELEASES TRAPPED ELECTRONS, EMITS LIGHT THROUGH OPTICAL FILTER TO PHOTODETECTOR/PHOTOMULTIPLIER

Front 11

ADC

Back 11

ASSIGNS EACH PICTURE ELEMENT (PIXEL) A VALUE THAT CORRESPONDS TO LEVEL OF BRIGHTNESS

Front 12

SPATIAL RESOLUTION

Back 12

AMOUNT OF DETAIL PRESENT IN ANY IMAGE

Front 13

SPEED OF FILM

Back 13

DETERMINED BY SIZE AND LAYERS OF CRYSTALS IN FILM AND SCREEN

Front 14

SPEED IN DIGITAL

Back 14

DETERMINED BY LEVEL OF EXP. RECIEVED BY IP (DETERMINED BY MANUFACTURER)

Front 15

ADVANTAGES OF CR

Back 15

1. EASILY INTEGRATED INTO EXISTING SYSTEMS
2. EXCELLENT FOR PORTABLE, BEDSIDE/IMMOBILE PT. EXAMS
3. WIDE DYNAMIC RANGE
IP ARE SIMPLE TO REPLACE

Front 16

CE (CONVERSION EFFICIENCY)

Back 16

AMOUNT OF LIGHT ADMITTED FOR EACH XR ABDORBED

Front 17

LUMINESCENCE

Back 17

ANY MATERIAL THAT ADMITS LIGHT IN RESPONSE TO SOME OUTSIDE STIMULATION

Front 18

FLUORESCENCE

Back 18

IF VISIBLE LIGHT IS EMITTED ONLY WHILE PHOSPHOR IS STIMULATED

Front 19

PHOSPHORESCENCE

Back 19

IF PHOSPHOR CONTINUES TO EMIT LIGHT AFTER STIMULATION

Front 20

DQE (DETECTIVE QUANTUM EFFICIENCY)

Back 20

% OF XR'S ABSORBED BY SCREEN AND HOW ACCURATELY THEY ARE COVERED TO IMAGE