patient comes in describing hand pain and says that he injured his hand when pla

Question

patient comes in describing hand pain and says that he injured his hand when playing football. You decide to use screen-film radiography to take an x-ray of the hand, suspecting a hairline fracture.

Describe ideal x-ray setting including: intensifying-screen thickness, film speed, cathode filament size, and object-detector distance. Only use the words: large, small, fast, slow, close or far to express your decision with a couple words describing the consequences. Briefly summarize your overall logic by each decision

Explanation / Answer

intensifying-screen thickness -   are thin sheets, or layers, of fluorescent materials . Film is much more sensitive to light than to x-radiation . Intensifying screens introduce blurring into the imaging process and places a limit on the visibility of detail

film speed    - the faster the film, the less exposure it needs. Film speed can be an important aspect in determining the amount of radiation exposure received by a patient. The greater the film speed, the lesser the exposure received by the patient.

cathode filament size - The cathode generally consists of a small coil of wire, called a filament, mounted in a focusing cup. Electrons are boiled off the filament by applying an electric current so that it becomes white hot - the process is called Thermionic Emission.

object-detector distance   - The object to detector distance is usually kept as small as possible to help minimize unsharpness.

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