RTBC - X-ray tube and components-
Questions & Answers
The production of x-rays at the anode target produces what percentage of heat? ✔️Correct Ans-
99% heat
The purpose of an anode cooling chart is to determine the proper amount of ✔️Correct Ans-Time
before taking another exposure
How long would it take the anode to cool completely after using a 120,000 HU exposure?
✔️Correct Ans-10 minutes
Using the following illustration, what is the maximum number of heat units (HU) this tube can
absorb? ✔️Correct Ans-240,000 HU
How long would it take the anode to cool completely after using 180,000 heat unit exposure?
✔️Correct Ans-12 minutes
How long would it take the anode to cool completely after using a 240,000 heat unit exposure?
✔️Correct Ans-14 minutes
How long would it take the anode to call completely after using a 20,000 heat unit exposure
✔️Correct Ans-4 minutes
, An exposure is taken resulting in 200,000 heat units. How long will it take the anode to cool the
50,000? ✔️Correct Ans-5 minutes
An exposure is taken resulting in 250,000 heat units. How long will it take the anode to cool to
100,000? ✔️Correct Ans-3 minutes
An exposure is taken resulting in 300,000 heat units. How long will it take the anode to cool to
100,000? ✔️Correct Ans-3.5 minutes.
An anode has a maximum of 40,000 heat units. One exposure of 10,000 heat units is produced.
What are the remaining heat units available? ✔️Correct Ans-30,000
Taking exposures over the maximum heat units allowed without a cooling off period would
result in ✔️Correct Ans-An overheated anode
Which of the following scenarios would result in the largest amount of heat units and require the
longest anode cooling time? ✔️Correct Ans-Routine abdomen series on a hypersthenic patient
Which of the following examples would result in the least amount of heat units and require the
shortest anode cooling time? ✔️Correct Ans-One PA hand for a bone age study
In an imaging system with a maximum heat unit of 40,000, which of the following combinations
of exposures could be produced without a cooling off period? ✔️Correct Ans-Two consecutive
exposures of 5000 heat units each
Questions & Answers
The production of x-rays at the anode target produces what percentage of heat? ✔️Correct Ans-
99% heat
The purpose of an anode cooling chart is to determine the proper amount of ✔️Correct Ans-Time
before taking another exposure
How long would it take the anode to cool completely after using a 120,000 HU exposure?
✔️Correct Ans-10 minutes
Using the following illustration, what is the maximum number of heat units (HU) this tube can
absorb? ✔️Correct Ans-240,000 HU
How long would it take the anode to cool completely after using 180,000 heat unit exposure?
✔️Correct Ans-12 minutes
How long would it take the anode to cool completely after using a 240,000 heat unit exposure?
✔️Correct Ans-14 minutes
How long would it take the anode to call completely after using a 20,000 heat unit exposure
✔️Correct Ans-4 minutes
, An exposure is taken resulting in 200,000 heat units. How long will it take the anode to cool the
50,000? ✔️Correct Ans-5 minutes
An exposure is taken resulting in 250,000 heat units. How long will it take the anode to cool to
100,000? ✔️Correct Ans-3 minutes
An exposure is taken resulting in 300,000 heat units. How long will it take the anode to cool to
100,000? ✔️Correct Ans-3.5 minutes.
An anode has a maximum of 40,000 heat units. One exposure of 10,000 heat units is produced.
What are the remaining heat units available? ✔️Correct Ans-30,000
Taking exposures over the maximum heat units allowed without a cooling off period would
result in ✔️Correct Ans-An overheated anode
Which of the following scenarios would result in the largest amount of heat units and require the
longest anode cooling time? ✔️Correct Ans-Routine abdomen series on a hypersthenic patient
Which of the following examples would result in the least amount of heat units and require the
shortest anode cooling time? ✔️Correct Ans-One PA hand for a bone age study
In an imaging system with a maximum heat unit of 40,000, which of the following combinations
of exposures could be produced without a cooling off period? ✔️Correct Ans-Two consecutive
exposures of 5000 heat units each
