What is the diaphragm used for positioning
A. Vision
B. Center point of the detection system
C. X-ray beam
D. A and C
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What causes ionizing radiation to cause damage?
A. Break covalent bond, produce ionic salt, make electrolyte unbalance
B. Generates heat in the tissue
C. Destroy DNA
D. Heating water in cells causes overheating
4D ultrasound imaging is
A. a) faster than 3d ultrasound.
B. b) the addition of a time dimension to 3d ultrasound imaging.
C. c) used to visualize bony structures.
Increasing the depth of field and number of scan lines will:
A. a) increase the number of frames per second.
B. b) have no effect on the number of frames per second.
C. c) decrease the number of frames per second
3D ultrasound imaging:
A. a) requires a high number of frames per second
B. b) requires a medium number of frames per second
C. c) requires a low number of frames per second
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