MEDICINE
RADIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cathode
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anode
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Either A or B
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None of the above
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Detailed explanation-1: -The anode (or anticathode) is the component of the x-ray tube where x-rays are produced. It is a piece of metal, shaped in the form of a bevelled disk with a diameter between 55 and 100 mm, and thickness of 7 mm, connected to the positive side of the electrical circuit.
Detailed explanation-2: -Conclusion: Positioning the patient with feet toward the anode, as opposed to the cathode, has no adverse effect on visual image quality assessment but it does have an effect on physical image quality.
Detailed explanation-3: -The primary beam is thus heavier on x-rays on the side toward the cathode & weaker (less photons) on the anode side. You should put the thickest part of your patient thus toward the cathode to take advantage of the heel effect.