Performance evaluation of RF coils integrated with an RF-penetrable PET insert for simultaneous PET/MRI.
Performance evaluation of RF coils integrated with an RF-penetrable PET insert for simultaneous PET/MRI.
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DOI：
10.1002/mrm.27444
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发表时间：
2019-03
影响因子：
3.3
通讯作者：
Levin CS
中科院分区：
文献类型：
--
作者：
Lee BJ;Watkins RD;Lee KS;Chang CM;Levin CS
开发了一种允许MR体线圈用于RF传输的“RF可穿透”PET插入物，以使现有MR中心更容易实现同步PET/MRI。本文着重于实验和分析，研究PET/RF线圈配置同步PET/MR研究。为了研究适当的RF线圈设计，构建并表征了TX/RX鸟笼线圈和仅RX相控阵线圈（来自体线圈的TX），两者均安装在PET环内。对于MR性能评价，计算B1场均匀性和MR图像信噪比（SNR）。通过基于CT的衰减图和重建的PET图像研究了每个线圈引起的PET光子衰减。当使用仅RX相控阵线圈（TX来自体线圈）时，与TX/RX鸟笼线圈相比，B1场均匀性和MR图像（GRE和FSE）SNR分别增加了2.4± 4.8%、386.1± 62.3%和205.0± 56.5%。尽管线圈的一些组件分布在PET FOV内，但在基于CT的衰减图和重建的PET图像中未显示出显著的PET光子衰减。研究了用于同步PET/MRI的RF可穿透PET插入物的RF线圈配置。仅RX相控阵线圈（来自体线圈的TX）优于TX/RX鸟笼线圈，MR性能得到改善，PET光子衰减可忽略不计。
An “RF-penetrable” PET insert that allows the MR body coil to be used for RF transmission was developed to make it easier for an existing MR center to achieve simultaneous PET/MRI. This paper focuses on experiments and analyses to study PET/RF coil configurations for simultaneous PET/MR studies. To investigate the appropriate RF coil design, a TX/RX birdcage coil and an RX-only phased-array coil (TX from body coil), both fitting inside the PET ring were built and characterized. For MR performance evaluation, B1 field uniformity and MR image signal-to-noise ratio (SNR) were calculated. PET photon attenuation due to each coil was studied via CT-based attenuation maps and reconstructed PET images. When using the RX-only phased-array coil (TX from body coil), compared to the TX/RX birdcage coil, the B1 field uniformity and the MR image (GRE and FSE) SNR increased by 2.4±4.8%, 386.1±62.3%, and 205.0±56.5%, respectively. Although some components of the coil were distributed within the PET FOV, no significant PET photon attenuation was shown in the CT-based attenuation map and reconstructed PET images. RF coil configurations for an RF-penetrable PET insert for simultaneous PET/MRI were studied. The RX-only phased-array coil (TX from body coil) outperformed the TX/RX birdcage coil with improved MR performance as well as negligible PET photon attenuation.
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DOI：
10.1007/s00259-002-0796-3
发表时间：
2002-07-01
影响因子：
9.1
作者：
Burger, C;Goerres, G;von Schulthess, GK
通讯作者：
von Schulthess, GK
影响因子：
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作者：
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影响因子：
3.8
作者：
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通讯作者：
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影响因子：
9.3
作者：
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通讯作者：
Ziegler, Sibylle I.
影响因子：
3.8
作者：
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通讯作者：
Bendriem, B