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Peer-reviewed

Development and Utility of an Imaging System for Internal Dosimetry of Astatine-211 in Mice

Atsushi Yagishita, M. Katsuragawa, Shin׳ichiro Takeda, Yoshifumi Shirakami, Kazuhiro Ooe, Atsushi Toyoshima, Tadayuki Takahashi, Tadashi Watabe

Bioengineering · 2023

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Summary

In targeted radionuclide therapy, determining the absorbed dose of the ligand distributed to the whole body is vital due to its direct influence on therapeutic and adverse effects. However, many targeted alpha therapy drugs present challenges for in vivo quantitative imaging. To address this issue, we developed a planar imaging system equipped with a cadmium telluride semiconductor detector that offers high energy resolution. This system also comprised a 3D-printed tungsten collimator optimized for high sensitivity to astatine-211, an alpha-emitting radionuclide, and adequate spatial resolution for mouse imaging. The imager revealed a spectrum with a distinct peak for X-rays from astatine-211 owing to the high energy resolution, clearly distinguishing these X-rays from the fluorescent X-ra

Source type
Peer-reviewed study
DOI
10.3390/bioengineering11010025
Catalogue ID
SNmoic23jt-k0k91q
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