Current through Register Vol. 50, No. 9, September 20, 2024
A. A licensee shall have a calibrated
dosimetry system available for use. To satisfy this requirement, one of the
following two conditions shall be met.
1. The
system shall have been calibrated by the National Institute of Standards and
Technology or by a calibration laboratory accredited by the American
Association of Physicists in Medicine. The calibration shall have been
performed within the previous two years and after any servicing that may have
affected system calibration.
2. The
system shall have been calibrated within the previous 4 years; 18 to 30 months
after that calibration, the system shall have been intercompared at an
intercomparison meeting with another dosimetry system that was calibrated
within the past 24 months by the National Institute of Standards and Technology
or by a calibration laboratory accredited by the American Association of
Physicists in Medicine. The results of the intercomparison meeting shall have
indicated that the calibration factor of the licensee's system had not changed
by more than 2 percent. The licensee shall not use the intercomparison result
to change the calibration factor. When intercomparing dosimetry systems to be
used for calibrating sealed sources for therapeutic units, the licensee shall
use a comparable unit with beam attenuators or collimators, as applicable, and
sources of the same radionuclide as the source used at the licensee's
facility.
B. The
licensee shall have available for use a dosimetry system for spot-check
measurements. To meet this requirement, the system may be compared with a
system that has been calibrated in accordance with Subsection A of this
Section. This comparison shall have been performed within the previous year and
after each servicing that may have affected system calibration. The spot-check
system may be the same system used to meet the requirement in Subsection A of
this Section.
C. The licensee shall
maintain a record of each calibration, intercomparison, and comparison for the
duration of the license. For each calibration, intercomparison, or comparison,
the record shall include:
1. the
date;
2. the model numbers and
serial numbers of the instruments that were calibrated, intercompared, or
compared, as required by Subsections A and B of this Section;
3. the correction factors that were
determined;
4. the names of the
individuals who performed the calibration, intercomparison, or comparison;
and
5. evidence that the
intercomparison meeting was sanctioned by a calibration laboratory or
radiologic physics center accredited by the American Association of Physicists
in Medicine.
D. The
licensee shall perform acceptance testing on the treatment planning system of a
therapy-related computer system 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;
4. the accuracy of the
software used to determine sealed source positions from radiographic images;
and
5. the accuracy of electronic
transfer of the treatment delivery parameters to the treatment delivery unit
from the treatment planning system.
AUTHORITY NOTE:
Promulgated in accordance with
R.S.
30:2001 et
seq.
