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107 E1

QuestionAnswer
What is the formula for Heat Units (3-phase/high-frequency)? HU=1.4×kVp×mA×s
What is the formula for generator power? kW=mA×kVp​/1000
What is the Square Law formula? mAs1/mAs2=(SID1/SID2)^2
What is the magnification factor formula? MF=SID/SOD
What does kVp control? Beam quality (penetration)
What does mAs control? Beam quantity (intensity/dose)
Why keep exposure time short? Reduce motion blur
What is thermionic emission? Electrons released from heated filament
What is the function of the focusing cup? Narrows electron beam (negative charge)
What are the three functions of the anode? Conduction, support, heat dissipation
What is the most common cause of tube failure? Arcing from tungsten vaporization
What is the line-focus principle? Angled target → smaller effective focal spot
What happens when target angle decreases? Smaller focal spot, better resolution
Where is X-ray intensity highest in the heel effect? Cathode side
How should the heel effect be used clinically? Thicker anatomy under cathode
What does rectification do? Converts AC to DC
Created by: cathrvn
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