Screen Film Radiology
Screen Film Radiology
Screen Film Radiology
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IMAGE QUALITY<br />
INFLUENCE OF ENERGY (kV)<br />
Bone Soft tissue<br />
THE CORRECT ENERGY<br />
Good difference between dense and soft tissues<br />
Best contrast<br />
TOO HIGH ENERGY<br />
Very few photons are absorbed<br />
Small difference between dense and soft tissues<br />
Low contrast<br />
TOO LOW ENERGY<br />
Most of the photons are absorbed<br />
Low signal<br />
Dose to the patient with no usable output<br />
• High energy may be necessary in dense or thick areas (abdomen, pelvis)<br />
• Very low energies are rarely of use and are harmful to the patient<br />
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