Which of the following factors is not used when calculating the monitor units for an isocentric (SAD) treatment?a. PDDb. Phantom scatter factorc. BSFd. TMRe. Collimator scatter factorf. Output (reference dose rate)

A patient was to receive treatment at a distance of 110 cm but was mistakenly treated at a distance of 105 cm. What was the margin of error in dose delivered?

What is the geometric penumbra for a cobalt-60 beam treated to an SSD of 80 cm if the source size is 1.2 cm and the source to collimator distance is 35 cm?

Referring to the question above, calculate the object to film distance if the film is located 140 cm from the source.

Calculate the equivalent square for a 6.5 cm x 17 cm field.

Low-dose-rate brachytherapy refers to treatments with dose rates:

A boost plan is created for a breast cancer patient whose tumor bed is located at a depth of 5 cm. If 200 cGy/fraction is prescribed to the 90% isodose line, the appropriate energy for this patient would be:

A patient’s prescribed total dose is 3000 cGy. The patient was to receive 300 cGy for 10 fractions at 90 cm SSD. What is the total dose the patient would receive if they were accidentally treated at 100 cm SSD?

What are MLCs typically made out of?

Every year, a new decayed value must be determined for the clinical use of cesium-137 tubes. The decay is always calculated from the original assayed value obtained when the source was received. This particular source was received on May 18th, 2017 and upon reception, the activity was 105.3 mCi. You plan to use this source on May 18th, 2021. What will the activity of this source be on the day you plan to use it?