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When MLC blocking is used in a treatment calculation, the area of the collimator is used in determining: I.   TMR II.  Sc III. PDD

Calculate the therapeutic ratio given a lethal dose of 4000 cGy and normal tissue tolerance of 6500 cGy.

Regarding the multiple beam alignment check, which of the following are general causes of beam misalignment? I.      Focal spot displacement II.     asymmetry of collimator jaws III.    Displacement in the collimotor rotation axis or the gantry rotation axis  

In particle therapy, which of the following factors can impact the range uncertainty? I.    Dose calculations II.   Setup III.  Organ and Anatomic Variations IV.  X-ray Energies

The coulomb is the metric unit of electrical ______________.

Which hinge angle below requires a 60-degree wedge to reduce the hot spot?

A port film is taken at 130 cm from the source.  The irradiated field measures 16 x 16 cm on the imager.  What does this field size measure at the isocenter?

Solve for x in the equation 4(x + 6) = 6x – 16.

Varying the beam size and shape utilizing multi-leaf collimators during treatment is known as which of the following?

Wavelength AND decay constant is represented by ______________.