| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2023-07-03 |
| タイトル |
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タイトル |
Axial scalable add-on PET/MRI prototype based on four-layer DOI detectors integrated with a RF coil |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Nishikido Fumihiko
Obata Takayuki
Suga Mikio
Iwao Yuma
Tashima Hideaki
Yoshida Eiji
Akram Hossain
Yamaya Taiga
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
We developed an add-on PET which was a PET insert based on 4-layered depth-of-interaction (DOI) detectors integrated with a birdcage RF-coil. The PET detectors were placed close to subjects to achieve high sensitivity. The DOI capability suppress degradation of spatial resolution at the edge of the field of view (FOV). Previously, we developed an first prototype which had a short axial FOV. In order to extend the axial FOV, we developed new scalable add-on PET prototype. The constructed RF-coil of the new prototype was combined with 24 DOI-PET detector units Each detector unit with two PET detectors was shielded with a carbon fiber shielding box. Each PET detector consisted of a 14 × 14 × 4-layer array of lutetium fine silicate crystals (1.9 mm × 1.9 mm × 4.0 mm), an 8 × 8 multi-pixel photon counter (MPPC, S12641PA-050) array and a readout circuit board with an ASIC. The RF coil was tuned for a 3T clinical MRI (MAGNETOM Verio, Siemens). We evaluated performance the scalable add-on PET prototype in simultaneous PET/MRI measurements. We obtained spatial resolutions of 2.0 mm at the center of the FOV and better than 3.3 mm in the whole FOV. The energy resolution of 12.4 % was obtained at 511 keV. In addition, we observed no degradation of PET performance caused by the MRI measurement. The signal-to-noise ratio (SNR) of the MRI image was 186.2 in simultaneous measurements with the PET. The maximum B0 and maximum difference of the secondary magnetic field due to the eddy current effect were smaller than 0.2 ppm and T, respectively. It meant that the influence of the PET detectors on the static magnetic field and secondary magnetic field did not cause problems. |
| 書誌情報 |
Nuclear Instruments and Methods in Physics Research Section A
巻 1040,
p. 167239,
発行日 2022-07
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| 出版者 |
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出版者 |
Elsevier |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0168-9002 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1016/j.nima.2022.167239 |
