This study examined the lymphatic drainage after injection of a radiotracer into the upper medial quadrant of the breast in healthy women. Most studies of lymphatic pathways of the breast have been performed in patients with breast cancer and concentrate on the upper lateral quadrant of the breast because of the high incidence of carcinoma at this site. The lymphatic drainage pathways of the me...

OBJECTIVE To review the discoveries underpinning the introduction of cerebral PET scanning and highlight its modern applications. BACKGROUND Important discoveries in neurophysiology, brain metabolism, and radiotracer development in the post-World War II period provided the necessary infrastructure for the first cerebral PET scan. METHODS A complete review of the literature was undertaken to...

Methotrexate (MTX), as a pharmaceutical, is frequently used in tumor chemotherapy and is also a part of the established treatment of a number of autoimmune inflammatory disorders. Radiolabeled MTX has been studied as a tumor‑diagnostic agent in a number of published studies. In the present study, the potential use of technetium‑99m‑labelled MTX (99mTc‑MTX) as a radiotracer was investigated for ...

We compared two radiotracer methods for measuring total microbial nucleic acid synthesis and specific growth rate. Using a sample from an oligotrophic environment, we found that there was excellent agreement between the two methods.