In perspective, where is the detection system relative to the patient?
A. Under the patient
B. In front of the patient
C. Behind the patient
D. Relative to the X-ray tube and the patient in the opposite direction
查看答案
Barium absorbs X-rays and appears on the fluorescent screen as
A. dark
B. white
C. gray
Where is the X-ray grid placed?
At the output of the X-ray tube
B. Above the patient
C. Between the patient and the detector
What is the diaphragm used for positioning
A. Vision
B. Center point of the detection system
C. X-ray beam
D. A and C
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
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