Abstract
We investigate biodistribution of gallium-labeled hydroxyethylidenediphosphonic acid (68Ga-HEDP) and diethylenetriaminepentakis(methylenephosphonic acid) (68Ga-DTPMP) in intact Wistar rats. It was shown that 68Ga-DTPMP accumulated mainly in the bone tissue providing high femur/blood and femur/muscle ratios and had high stability in vivo. In contrast, 68Ga-HEDP was characterized by low stability and high uptake of radioactivity in blood throughout the study. So 68Ga-DTPMP can be considered as a new prospective radiotracer in oncology for imaging bone tissue metastasis by positron emission tomography.
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