Scintillator selection for MR compatible gamma detectors

Scintillator selection for MR compatible gamma detectors
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MR 兼容伽马探测器的闪烁体选择

DOI:
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发表时间:
2002
期刊:
IEEE Nuclear Science Symposium Conference Record
影响因子:
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通讯作者:
M. Senda
M. Senda
中科院分区:
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文献类型:
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作者:
S. Yamamoto;K. Kuroda;M. Senda

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我们研究了几种闪烁体的磁化率,以便为 MR 兼容伽马探测器选择最佳材料。研究的闪烁体是 Al 容器中的 NaI(Tl)、Cu 容器中的 NaI(Tl)、CsI(Tl)、BGO、LSO、LGSO 和 GSO。 Al 容器中的 NaI(Tl)、Cu 容器中的 NaI(Tl) 和 CsI(TI) 是 MR 兼容伽马探针、成像探针或 SPECT 的候选材料,而 BGO、LSO、LGSO 和 GSO 是 MR 兼容 PET 的候选材料。我们还通过 MRI 扫描这些闪烁体来研究图像伪影和失真。 NaI(Tl)、CsI(Tl)、BGO 和 LSO 的敏感性与人体组织相似。在这些闪烁体中,Cu 容器中的 Nal(Tl) 显示出对人体组织最接近的敏感性和 MRI 图像上最小的伪影,是 MR 兼容伽马探针或成像探针以及 SPECT 的良好材料。对于 MR 兼容 PET,BGO 和 LSO 对人体组织和 MRI 图像上的小伪影表现出相似的敏感性。然而,LGSO 和 GSO 表现出与人体组织截然不同的敏感性,并且由于这些闪烁体中的钆 (Gd),在 MRI 图像上产生了明显的伪影和失真。
We investigated magnetic susceptibility of several scintillators in order to select the best material for MR compatible gamma detectors. The scintillators investigated were NaI(Tl) in Al container, NaI(Tl) in Cu container, CsI(Tl), BGO, LSO, LGSO, and GSO. NaI(Tl) in Al container, NaI(Tl) in Cu container and CsI(TI) are candidates for an MR compatible gamma probe, imaging probe or SPECT, while BGO, LSO, LGSO, and GSO are the candidates for MR compatible PET. We also investigated image artifact and distortion by scanning these scintillators by an MRI. Susceptibility of NaI(Tl), CsI(Tl), BGO, and LSO showed similar to human tissue. In these scintillators, Nal(Tl) in Cu container showed the nearest susceptibility to human tissue and smallest artifact on the MRI image and is a good material for an MR compatible gamma probe or imaging probe as well as SPECT. For an MR compatible PET, BGO and LSO showed similar susceptibility to human tissue and small artifacts on the MRI images. However LGSO and GSO showed much different susceptibility from human tissue and produced significant artifact and distortion on the MRI images because of the gadolinium (Gd) in these scintillators.