How many heat units (HU) are created from a 20-second fluoroscopy study using a high-frequency x-ray machine set at 110 kVp and 5 mA?

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Multiple Choice

How many heat units (HU) are created from a 20-second fluoroscopy study using a high-frequency x-ray machine set at 110 kVp and 5 mA?

Explanation:
Heat units estimate the thermal energy deposited in the x-ray tube during an exposure. For fluoroscopy with a high-frequency generator, HU is calculated as kVp × mA × seconds × 1.45. So, 110 kVp × 5 mA × 20 s equals 11,000, and multiplying by 1.45 gives 15,950 HU. This is why the correct choice is 15,950 HU. The other values would require using different generator factors or rounding.

Heat units estimate the thermal energy deposited in the x-ray tube during an exposure. For fluoroscopy with a high-frequency generator, HU is calculated as kVp × mA × seconds × 1.45. So, 110 kVp × 5 mA × 20 s equals 11,000, and multiplying by 1.45 gives 15,950 HU. This is why the correct choice is 15,950 HU. The other values would require using different generator factors or rounding.

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