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Medical Imaging Systems Question on X Rays and the Ordering of the Elements

The X-ray attenuation coefficients as a function of photon energy for three materials are shown in the figure below. A tissue phantom containing these three materials is imaged at two different X-ray photon energies of 50 keV and 150 keV. When the developed X-ray film is viewed, which of the following statements is/are TRUE ?
X-ray attenuation coefficients

A

Bone will appear relatively brighter than DCA in 50 keV.

B

DCA will appear relatively brighter than bone in 50 keV.

C

Bone will appear relatively brighter than DCA in 150 keV.

D

DCA will appear relatively brighter than bone in 150 keV.

Answer

DCA will appear relatively brighter than bone in 50 keV.

Explanation

Solution

The correct option is (B) : DCA will appear relatively brighter than bone in 50 keV and (C) : Bone will appear relatively brighter than DCA in 150 keV.