1. THE X-RAY UNIT
THE BASICS

2. WHAT FOUR COMPONENTS ARE IN TYPICAL RADIOGRAPHIC ROOM?
1. X-RAY TUBE
2. OPERATING CONSOLE
3. HIGH VOLTAGE GENERATOR
4. X-RAY TABLE

3. THE X-RAY TUBE Chapter 6 in Bushong
OVERHEAD
Ceiling suspension
Sets of rails-controls longitudinal/transverse positioning
Telescoping column for controlling vertical distance.
FLOOR
Tube-support column mounted on floor
Same positioning options as overhead
Counter weight on back of telescoping column. Why?

4. OTHER COMPONENTS ON X-RAY TUBE
Collimator light
Collimator controls
Transverse lock
Horizontal lock
Longitudinal lock
Vertical lock
Tube head lock
Tape Measure

5. C-arm Protective housing Isotrophically Window Useful beam Leakage
Acceptable level of leakage is….?

6. What is the typical voltage range? What is the typical current range?
CHAPTER 5
What is the typical voltage range?
What is the typical current range?

7. X-RAY TABLE Must be radiolucent Can be tilted Float Holds bucky
Has weight limit of 300lbs(Carbon-fiber)
Easily cleaned, hard to scratch and without crevices

8. X-RAY CONSOLE
Allows the radiographer to control the x-ray tube current (mA) and the voltage (kVp) so that a useful image is produced.
? Controls the quantity
? Controls the quality
What does a line voltage compensator do?

9. AN R/F ROOM Contains a radiographic unit Contains a fluoroscopic unit
located under radiographic table
used in studies where it is necessary to watch a procedure on a monitor using x-rays.

10. HIGH VOLTAGE GENERATOR
Housed within the x-ray room

11. Mobile radiography

12. mAs AND THE IMAGE ON THE FILM Fauber pgs 51-53
What is mAs?
mAs = the mA X exposure time
mAs is the quantity of x-rays
mAs produces the overall blackening(DENSITY) on the film or brightness on filmless image receptors
Pg 53-note the relationship between density and brightness

13. kVp and the image produced on the film (pgs 53-57)
What is kVp?
Controls the quality or penetrating quality of the x-ray beam
Produces the varying shades of gray on the film. (variations of brightness and density)
Gray scale
Long or low and short or high contrast

14. Anatomic part and contrast
Range of densities
Tissue composition
Pgs 57-58

15. Intro to Digital Imaging Fauber and Carter
Carter pgs 80-82
Does KVP matter anymore?
Does mAs matter anymore?

16. Four radiographic qualities
Density
Contrast
Spatial resolution
Recorded detail
Size/Shape distortion
Overall blackness
Difference between adjacent densities
Smallest object detected (DR)
Sharpness of the lines of an image
Misrepresentation of the true size or shape of image

17. Controlling and influencing factors
What might control or influence the four radiographic qualities?
Density
Contrast
Recorded detail
Distortion
Images 4-28,4-29, 4-30, 4,31 pg 104 Fauber
Images 5-11, 5-15, Figure 5-16, all images on pg Fauber

18. Sharpness vs. Visibility
Driving on a foggy night (visibility)
Driving after having drops in your eyes (Sharpness)

19. Good images vs Bad images
Over exposed
Over penetrated
Poor detail
distortion