Ariz. Admin. Code § R9-7-726 - Calibration Measurements of Brachytherapy Sources, Decay of Sources Used for Ophthalmic Treatments, and Computerized Treatment Planning Systems
A. Before the first
medical use of a brachytherapy source after the effective date of this rule, a
licensee shall have:
1. Determined the source
output or activity using a dosimetry system that meets the requirements of
R9-7-733(A);
2. Determined source
positioning accuracy within applicators; and
3. Used published protocols currently
accepted by nationally recognized bodies to meet the requirements of
subsections (A)(1) and (A)(2).
B. A licensee may use measurements provided
by the source manufacturer or by a calibration laboratory accredited by the
American Association of Physicists in Medicine that are made in accordance with
subsection (A).
C. A licensee shall
mathematically correct the outputs or activities determined in subsection (A)
for physical decay at intervals consistent with one percent physical
decay.
D. Only an authorized
medical physicist shall calculate the activity of each strontium-90 source that
is used to determine the treatment times for ophthalmic treatments. The decay
shall be based on the activity determined under subsection (A).
E. A licensee shall perform acceptance
testing on the treatment planning system of therapy-related computer systems in
accordance with published protocols accepted by nationally recognized bodies.
At a minimum, the acceptance testing shall include, as applicable, verification
of:
1. The source-specific input parameters
required by the dose calculation algorithm;
2. The accuracy of dose, dwell time, and
treatment time calculations at representative points;
3. The accuracy of isodose plots and graphic
displays; and
4. The accuracy of
the software used to determine sealed source positions from radiographic
images.
F. A licensee
shall retain records of each source activity determination and ophthalmic
source decay correction, and documentation of the acceptance testing protocol
required under subsection (E) for three years after the date of the procedure
required in subsections (A) and (D), and for the records created in conjunction
with subsection (E), the record shall be maintained for three years from the
last date of the protocol's use.
Notes
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