List of top Medical Imaging Systems Questions on X Rays and the Ordering of the Elements

An X-ray beam of initial intensity I₀ of 70 keV imaging the chest is assumed to undergo attenuation through the muscle tissue for a thickness of 16 cm and further through the bone tissue for a thickness of 4 cm. The half value layer (HVL) thicknesses for the muscle and bone are 3.5 cm and 1.8 cm, respectively. The percentage of X-ray intensity transmitted through the body is ________.
Give your answer rounded off to 2 decimal places.

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 ?

Which one of the following events is NOT typically encountered in diagnostic X-ray projection radiography ?

Consider two radionuclides P and Q. Suppose the half-life of P (\( t_{1/2}^P \)) is four times that of Q (\( t_{1/2}^Q \)). At time \( t = 0 \), there are \( N_0 \) atoms of both radionuclides. When will the radioactivity of the two radionuclides be equal?