Screen Film Radiology
Screen Film Radiology
Screen Film Radiology
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INFLUENCE OF ENERGY (kV)<br />
kV<br />
High<br />
Low<br />
Low<br />
Loss of contrast<br />
Pale image<br />
Lack of photons<br />
going through<br />
Pale and loss of<br />
information<br />
High<br />
INFLUENCE OF ENERGY (kV)<br />
Patient dose<br />
Penetration<br />
Contrast<br />
Loss of contrast<br />
Dark image<br />
High contrast<br />
Dark image<br />
The choice of kV depends on the patient anatomy and the object to be imaged<br />
• Thick or dense part of the body: High kV,<br />
ex. Abdomen, pelvis - 80 to 100 kV<br />
• Small or flat parts of the body: Low kV,<br />
ex. Breast, hand - 30 to 50 kV<br />
Low kV High kV<br />
Then the necessary mAs is elected to produce the clinically useful image<br />
mAs<br />
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