Radiation Safety in Nuclear Medicine: Report II. Normative Documents

The specifics of improving current regulatory acts on nuclear medicine under the conditions of the "regulatory guillotine" are considered. The current state of regulatory documentation on ensuring the radiation safety of patients, personnel, individuals from the population and the environment, as well as on assessing working conditions and pension provision for personnel of domestic nuclear medicine units, is analyzed. The presence of a large number of provisions that are scientifically unsubstantiated and inconsistent with international recommendations and many years of nuclear medicine practice is shown. A number of proposals have been developed to introduce appropriate amendments to regulatory documents intended for practical use after the end of the “regulatory guillotine”.

Konventionelle nuklearmedizinische Bildgebung bei Hyperparathyreoidismus

For the assessment of hyperparathyroidism besides cervical ultrasound, 99 mTc-Sestamibi (MIBI) imaging is being used on a routine basis in nuclear medicine practice. MIBI is a positively charged complex, which is bound in mitochondria rich parathyroidal tissue and shows a reduced washout as compared to normal thyroid tissue. This characteristic is used during dual-phase imaging by acquiring early and late images.In order to better localize adenomas, especially if they are ectopic, it is helpful to combine planar imaging with cross-sectional (-hybrid) imaging using SPECT or SPECT/CT. With this approach, in combination with ultrasound the sensitivity for adenomas is known to be over 80 % up to 100 %. For multiglandular involvement or hyperplasia, a significantly lower detection rate is known, which, however, can be improved by a combination of planar and tomografic imaging. To what extend medication can influence the results of MIBI imaging is not well known. Glucocorticoids and calcium channel antagonist might have a negative influence on the uptake of MIBI. Another potential influencing factor could be the presence of P-glykoprotein in some adenomas, leading to a faster efflux of MIBI out of the adenoma cells and consecutively a lower detection rate.

Dosimetry: a Neglected Aspect of Nuclear Medicine Practice in Bangladesh

not available. Bangladesh J. Nuclear Med. 21(2): 67-68, July 2018