Which of the Following Data Needs to Be Known to Perform

Multiple Choice

Which of the following data needs to be known to perform an attenuation calculation?
1) Thickness of the part
2) Original x-ray beam intensity
3) The intensity of the transmitted radiation (as measured by the detector)

A) thickness of the part and original x-ray beam intensity only
B) thickness of the part and the intensity of the transmitted radiation (as measured by the detector) only
C) original x-ray beam intensity and the intensity of the transmitted radiation (as measured by the detector) only
D) thickness of the part, original x-ray beam intensity, and the intensity of the transmitted radiation (as measured by the detector)