1. Equipment Operation and Maintenance

2. Grid-controlled tube
Designed to turn on and off rapidly, providing short precise exposures
Use in fluoro and in capacitor discharged (condenser-discharge) mobile units
Uses a molybdenum focusing cup

3. FLUOROSCOPY INPUT PHOSPHOR PHOTOCATHODE OUTPUT PHOSPOR LARGE DIAMETER
CESIUM IODIDE
X-RAYS  LIGHT
PHOTOCATHODE
LIGHT  ELECTRONS
OUTPUT PHOSPOR
SMALLER DIAMETER
ELECTRONS  LIGHT

4. FLUORO CONT. FOCUSSING LENSES VIDICOM/PLUMBICON BEAM SPLITTING DEVICEmA
ABS
AGC or ABC

5. # OF INPUT LIGHT PHOTONS
FLUX GAIN=# OF OUTPUT LIGHT PHOTONS
# OF INPUT LIGHT PHOTONS
MINIFICATION GAIN
= Diameter of input (squared)
diameter of output (squared
BRIGHTNESS GAIN:
minification x flux

6. Trifield Tubes
25/17/12 smaller diameter of input phosphor reduces:
field of viewmagnification
minification gain dimmer image

7. Larger film format greater the # of films =higher patient exposure
Cinefluoroscopy
rapidly obtained photospot image (35mm film)15,30,60,90 frames per sec.
cardiac cath
Spot film
12 frames per sec
smaller film size
cassette loaded

8. FLUORO QUESTIONS
#9,24,30,36,38,40,44,47,54
63, 69,70

9. AEC

10. Collimation and AEC Photodiode ion chamber light sensitive
under table, behind cassette
ion chamber
charge sensitive
above bucky and cassette
#10,14,25,27,34,81,92,102,113,

12. CIRCUITS

13. Self induction = autotransformer and choke coil
Mutual induction =High voltage transformer & filament circuit
V = VS = NS
VP= NP
I = NS = IP
NP=IS

14. Rectifiers
Filament circuit
rheostat
filament circuit

15. Star and wye configurations
Motor and generators
Rheostat
Star and wye configurations
transformer windings in 3-phase circuits
5,20,23,26,35,45,46 ,51,52,53,74,77

16. THREE PHASE/SINGLE PHASEHU
single phase=ma x time x kvp
three phase/ 6 pulse
ma x time x kvp x 1.35
three phase/12 pulse
ma x time x kvp x 1.41

17. VOLTAGE RIPPLE 100% 13% 4 or 3% ?’s 35,64,96,97,99,105,106
Single phase
three phase 6 pulse
three phase pulse
100%
13%
4 or 3%
?’s 35,64,96,97,99,105,106

18. Tomography
Thinner the cut the _________the angle 43

19. QUALITY CONTROL TESTS SPINNING TOP TIMER WIRE MESH SCREEN/FILM CONTACT
PENETROMETER KVP AND CONTRAST
STAR PATTERN FOCAL SPOT SIZE
CUTIE PIE ROENTGEN DOSIMETER
WISCONSIN TEST TOOL KVP IN BEAM
GEIGER RADIOACTIVITY

20. spinning top tests Spinning top tests
half wave/single phase = exposure time x 60
Full wave/single phase = exposure time x 120
Three phase –exposure time =arc size/360
timers and rectifiers
dots and dashes(12 dots of 1/10sec, 24 dots of 1/5 sec, 6 dots for 1/20 sec)
synchronous spinning top
solid arc
#18,28,41,50,57,61,66,65,68,

21. TUBE LIFE/HEAT LOAD
#6,12,16,33,44,73,77,101,

22. Mobile radiography, CT, Misc
Capacitors- temporarily stores energy-no battery
2,3,4,22,37,42,55,58,71,78,87,88,120

23. DIGITAL
Corectec

24. Misc.
Light absorbing dye in screens reduce diffusion of fluorescent light