Tomographic Imaging by a Si/CdTe Compton Camera for ¹¹¹In and ¹³¹I Radionuclides
| العنوان: | Tomographic Imaging by a Si/CdTe Compton Camera for ¹¹¹In and ¹³¹I Radionuclides |
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| المؤلفون: | Tadashi Orita, Shin'ichiro Takeda, Pietro Caradonna, Shin Watanabe, Tadayuki Takahashi, Goro Yabu, Fumiki Moriyama, Hiroki Yoneda |
| المصدر: | IEEE Transactions on Radiation and Plasma Medical Sciences. 6:592-600 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Physics, Range (particle radiation), Tomographic reconstruction, business.industry, Detector, Resolution (electron density), Atomic and Molecular Physics, and Optics, Cadmium telluride photovoltaics, Full width at half maximum, Optics, Radiology, Nuclear Medicine and imaging, business, Instrumentation, Image resolution, Energy (signal processing) |
| الوصف: | Tomographic imaging with radionuclides commonly used in nuclear medicine, such as $^{111}$In (171 and 245 keV) and $^{131}$I (364 keV), is in high demand for medical applications and small animal imaging. The Si/CdTe Compton camera with its high angular and high energy resolutions is an especially promising detector to extend the energy coverage for imaging to the range that covers gamma-ray emitted from these radionuclides. Here, we take the first steps towards short-distance imaging by conducting experiments using three-dimensional phantoms composed of multiple sphere-like solutions of $^{111}$In and $^{131}$I with a diameter of 2.7 mm, placed at a distance of 41 mm. Using simple back-projection methods, the positions of the sources are reproduced with a spatial resolution of 11.5 mm and 9.0 mm (FWHM) for $^{111}$In and $^{131}$I, respectively. We found that a LM-MLEM method gives a better resolution of 4.0 mm and 2.7 mm (FWHM). We resolve source positions of a tetrahedron structure with a source-to-source separation of 28 mm. These findings demonstrate that Compton Cameras have the potential of close-distance imaging of radioisotopes distributions in the energy range below 400 keV. |
| تدمد: | 2469-7303 2469-7311 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::ef1b9fd676c19b6a33e359de35d2e46d https://doi.org/10.1109/trpms.2021.3104665 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........ef1b9fd676c19b6a33e359de35d2e46d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24697303 24697311 |
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