RT Journal Article
SR Electronic
T1 Dose Calibrator Linearity Testing Using an Improved Attenuator System
JF Journal of Nuclear Medicine Technology
JO J. Nucl. Med. Technol.
FD Society of Nuclear Medicine
SP 169
OP 172
VO 20
IS 3
A1 Oswald, William M.
A1 Herold, Thomas J.
A1 Wilson, Mark E.
A1 Hung, Joseph C.
YR 1992
UL http://tech.snmjournals.org/content/20/3/169.abstract
AB Nuclear Regulatory Commission (NRC) guidelines state that dose calibrators must be tested for linearity upon installation and quarterly thereafter over a range of activities from 10 μCi (370 kBq) to the highest dose administered to the patient (300 mCi [11.1 GBq] of iodine-131 for therapy at our institution). The simplest method of linearity testing utilizes commercial attenuator kits. These kits consist of different attenuator tubes plus a central tube that remains in the dose calibrator during the entire testing process. The disadvantage of these kits is that the test has to be performed twice, once with a high activity source and a second time with a lower activity source, to cover the full range of activities required by the NRC. We have designed two accessory tubes that can be used in conjunction with a commercial attenuator system, there by covering the range of activity required by the NRC with a single source of technetium-99m. It takes less than 4 min to complete the entire measurement with this improved linearity test kit.