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In a linear accelerator, which of the following is the correct arrangement of components as “seen” by the beam: Jaws (secondary collimator) Ion chamber Primary collimator Target Flattening filter

An incident photon beam of energy 140 keV transfers a mean energy of 75 keV to charge particles in the absorber. If the linear attenuation coefficient is 0.350 mm-1, what is the energy transfer coefficient?

What is the function of an ion chamber in a linear accelerator? Select all that apply.

The mass attenuation coefficient has units of:

What is the collection efficiency? 

A tumor is treated using an AP field with a high-energy photon beam. The tumor is located at a depth of 8 cm where the percent depth dose is 79.8%. The spinal cord is in the path of the beam and Is located at a depth of 16 cm where the percent depth dose is 39.3%. If 250 cGy is delivered to the tumor, calculate the dose delivered to the spinal cord.

A deuteron particle is a combination of a proton and an electron.

How is a megavoltage x-ray beam hardened?

The HVL thickness of a given material is 12 cm. What is the linear attenuation coefficient? 

BONUS QUESTION: The asterisk character “*” will match zero or more of the preceding token in a regular expression.