PT  - JOURNAL ARTICLE
AU  - Castronovo, Frank P.
TI  - Time Dependent Radiation Exposures Surrounding Technetium-99m MDP Patients
DP  - 1991 Sep 01
TA  - Journal of Nuclear Medicine Technology
PG  - 182--184
VI  - 19
IP  - 3
4099  - http://tech.snmjournals.org/content/19/3/182.short
4100  - http://tech.snmjournals.org/content/19/3/182.full
SO  - J. Nucl. Med. Technol.1991 Sep 01; 19
AB  - Radiation surveys of technetium-99m (99mTc) MDP bone scan patients were performed at 5 min, 4 hr, and 24 hr post administration. The measurement distances chosen were surface, 1 ft (30.5 cm) and 3 ft (100 cm) resulting in variable radiation exposures as a function of time and bony pathology. As expected the highest exposures were immediately after tracer administration. Thereafter, urinary excretion and biologic redistribution dominated, resulting in significantly lower exposures at 4 hr and 24 hr for the negative bone scan group. Patients with bony metastases retained more of the injected dose than those with negative scintigrams. This was reflected with the 4 hr and 24 hr surveys.