X-ray tube rating 1 Flashcards
What is an X-ray tube rating chart?
An X-ray tube rating chart is a document or reference guide that provides detailed information about the specifications and capabilities of an X-ray tube.
What key parameters are included in an X-ray tube rating chart?
- Maximum tube current
- Maximum tube voltage
- Heat dissipation capacity
- Focal spot size
- Anode angle
- Target material
What information does the X-ray tube rating chart provide?
It provides information on the safe exposures and safe operating conditions of X-ray tubes.
Why is the X-ray tube rating chart helpful for radiographers?
It helps radiographers understand the limitations and performance characteristics of the X-ray tube, allowing them to operate the equipment safely and effectively within specified parameters.
What factors govern the rating of an X-ray tube?
- Temperature to which each part of the tube assembly may safely rise.
- Measures taken in the design and manufacture to minimize and tolerate temperature rise.
What is tube rating?
Tube rating is defined as the maximum input of electrical energy (load) that may be applied to an X-ray tube without causing damage by overheating any part of the tube assembly.
What are the two sets of factors for an X-ray unit?
- Selectable or alterable exposure factors
- Non-selectable exposure factors
What are some examples of selectable exposure factors?
kVp
mA
Exposure time/mAs
Focal spot size
Single or multiple exposures
Radiography or screening
What are some examples of non-selectable exposure factors?
Rectification
Thermal capacity of anode/shield
Anode angle
Filtration
Rating of high-tension cable
Rating of high-tension transformer
What is the unit of measurement for rating purposes of an X-ray tube?
The unit of measurement is the Heat Unit (HU), obtained by multiplying kVp, mA, and seconds.
