An 8‐dipole transceive and 24‐loop receive array for non‐human primate head imaging at 10.5 T
| العنوان: | An 8‐dipole transceive and 24‐loop receive array for non‐human primate head imaging at 10.5 T |
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| المؤلفون: | Andrea Grant, Jan Zimmermann, Russell L. Lagore, Jerahmie Radder, Kamil Ugurbil, Gregor Adriany, Lance DelaBarre, Essa Yacoub, Steen Moeller, Noam Harel |
| المصدر: | NMR Biomed |
| بيانات النشر: | Wiley, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Signal-To-Noise Ratio, Article, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Optics, Sampling (signal processing), Animals, Radiology, Nuclear Medicine and imaging, Spectroscopy, Physics, business.industry, Macaca mulatta, Magnetic Resonance Imaging, Loop (topology), Dipole, Electromagnetic coil, Molecular Medicine, Female, Transceiver, business, Head, 030217 neurology & neurosurgery, Diffusion MRI, Tractography, Radiofrequency coil |
| الوصف: | A 32-channel radiofrequency coil was developed for brain imaging of anesthetized non-human primates (Rhesus Macaque) at 10.5 tesla. The coil is composed of an 8-channel dipole transmit/receive array, close-fitting 16-channel loop receive array headcap, and 8-channel loop receive array lower insert. The transceiver dipole array is composed of eight end-loaded dipole elements self-resonant at the 10.5 tesla proton Larmor frequency. These dipole elements were arranged on a plastic cylindrical former which was split in two to allow for convenient animal positioning. Nested into the bottom of the dipole array former is located an 8-channel loop receive array which contains 5×10 cm(2) square loops arranged in two rows of four loops. Arranged in a close-fitting plastic headcap is located a high-density 16-channel loop receive array. This array is composed of 14 round loops 37 mm in diameter and two partially detachable, irregularly shaped loops that encircle the ears. Imaging experiments were performed on anesthetized non-human primates on a 10.5 tesla MRI system equipped with body gradients with a 60 cm open bore. The coil enabled submillimeter (0.58 mm isotropic) high resolution anatomical and functional imaging as well as tractography of fasciculated axonal bundles. The combination of a close-fitting loop receive array and dipole transceiver array allowed for a higher channel count receiver and consequent higher signal-to-noise ratio and parallel imaging gains. Parallel imaging performance supports high resolution functional MRI and diffusion MRI with a factor of three reduction in sampling. The transceive array elements during reception contributed approximately one quarter of signal-to-noise ratio in the lower half of the brain which was farthest from the close-fitting headcap receive array. |
| تدمد: | 1099-1492 0952-3480 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e3c2fb548f7f3fc6ee4546b460f76f7Test https://doi.org/10.1002/nbm.4472Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....8e3c2fb548f7f3fc6ee4546b460f76f7 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10991492 09523480 |
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