RAD190-ch6.txt

Changes incoming low voltage (V) to high voltage (kV).
A. autotransformer
B. rectifiers
C. high voltage transformer

Changes alternating current (AC) to direct current (DC)
A. autotransformer
B. high voltage transformer
C. rectifiers

Supplies power to kVp selection and other parts of the x-ray circuit
A. rectifiers
B. high voltage transformer
C. autotransformer

Changes 54 Volts to 54,000 Volts
A. high voltage transformer
B. autotransformer
C. rectifiers

Operator selects “PA CHEST” x-ray from a menu of options. Machine sets corresponding exposure factors.
A. AEC (Automatic Exposure Control)
B. APR (Anatomically Programmed Radiography)

Operator selects an x-ray detector area corresponding the anatomy of interest. For example, the center cell may be
selected for an AP lumbar spine radiograph.
A. AEC (Automatic Exposure Control)
B. APR (Anatomically Programmed Radiography)

True/False
Prolonged rotoring, making a rapid series of high exposures, or making exposures on a cold anode contribute to xray
tube failure due to overheating.
True False

Match the term to the appropriate description.
A. kVp B. mAs C. Focal spot size
1. Directly proportional to the quantity of the x-ray beam.
2. Determines quality of the x-ray beam.
3. Affects sharpness of the image

Which of the following is TRUE regarding Automatic Exposure Control (AEC)
A. requires accurate positioning
B. require used of the Bucky mechanism
C. provides consistent radiographic density
D. all of the above.

Using 200 mA at 0.25 sec results in an mAs value of:
A. 50 mAs
B. 200 mAs
C. 25 mAs
D. None of these
E. 100 mAs

Which of the following exposure settings would result in the same radiographic density as
using 400 mA 0.1 sec 70 kVp
1. 200 mA 0.2 sec 70 kVp
2. 400 mA 0.2 sec 80 kVp
3. 800 mA 0.05 sec 70 kVp
A. 2 and 3
B. 1 and 3
C. 1 and 2
D. 1, 2, and 3