What is the test used to evaluate the contamination or leakage of a sealed radioactive source?

What is the tolerance for x-ray output constancy during daily QA on a linac?

The therapist performs a collimator size check daily on the linac that delivers SBRT treatments.  What is the tolerance of this spot check?

A decrease in field size will equate to an increase in dose rate (output).

Before a brachytherapy procedure begins, the source guides should be inspected to ensure they have no kinks.

Chart checks are done only before treatment starts and at the completion of the the treatment.

A therapist is checking flattness and symmetry during daily QA procedures before the treatment day.  What is the tolerance for flattness and symmetry of a 6MV beam in this instance?

A Radiation Oncology department has 3 linear accelerators that were installed at the same time.  The planning software does not have to be commissioned to each individual machine because they were installed at the same time – the dose calculated will be the same no matter which machine the plan is delivered on.

Which of the following types of testing occurs when a linear accelerator is installed to establish baseline values to be used in dosimetric calculations?

1. Which of the following lists levels of human structure from the most complex to the simplest?