(a)[2]
Explain what is meant by the sharpness and by the contrast of an X-ray image.
(b(i))[2]
State, with reference to how X-rays are produced, what is meant by $80\,\text{keV}$ X-rays.
(b(ii))[2]
Calculate the ratio $I_{T} / I$ for $80\,\text{keV}$ X-rays passing through a thickness of $1.4\,\text{cm}$ of bone.
(c)[3]
An X-ray image of a student's upper leg is produced. One part of the X-ray beam passes through a much larger thickness of muscle, while another part passes through some muscle and the leg bone. Use data from Fig. 10.2 to suggest whether the image has good contrast.