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

To determine the number of heat units (HU) generated during a fluoroscopy study, we need to use the formula for calculating heat units for a high-frequency x-ray machine. The formula is:

Heat Units (HU) = (kVp × mA × time in seconds) × correction factor.

For high-frequency machines, the typical correction factor is 1.0.

In this scenario:

• kVp = 110

• mA = 5

• Time = 20 seconds

Now, we can plug these values into the formula:

Heat Units (HU) = (110 kVp × 5 mA × 20 seconds) × 1.0

= 110 × 5 × 20

= 11,000 HU.

This calculation correctly shows that the total heat units generated from this fluoroscopy study is 11,000 HU.

However, the choice listed as D highlights a misunderstanding or a miscalculation in the context of this particular setup or may refer to a different set of conditions. To reach 15,950 HU, additional factors affecting heat generation would need to be considered, which are not standard or would typically relate to other imaging scenarios or equipment settings outside the given conditions. Thus