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Which of the following is the ratio of the dose rate of a given field size to the dose rate of the reference field size?

A patient is prescribed 3600 cGy with a total of 15 fractions for an AP/PA lung field weighted 2:1 respectively.  How many cGy does the AP field receive in one fraction?

As depth increases, PDD:

When using a wedge in the radiation beam, the degree of tilt in the iso dose curve is equal to:

Which of the following describes why the RDR for the cobalt-60 treatment machine constantly changes?

Two abutting PA fields are to be matched at a depth of 5 cm.  The beam energy used is 10 MV.  The field collimator lengths are 20 cm and 24 cm and both are treated using 100 SSD. Calculate the skin Gap.

A patient is going to be treated on a linac using an energy of 6 MV to a depth of 5 cm.  The SSD is 91 cm.  The TAR is 0.875 and the output is 1.02 cGy/MU.  The patient will receive 240 cGy per fraction.  How many monitor units must be delivered?

Which of the following best describes the Mayneord factor?

Which of the following was primarily developed for nonisocentric treatments?

Which of  the following is the third dimension of IMPT?