A temperature-controlled cryogen free cryostat integrated with transceiver-mode superconducting coil for high-resolution magnetic resonance imaging
| Autor: | Rose-Marie Dubuisson, Georges Willoquet, Luc Darrasse, Jean-Christophe Ginefri, Isabelle Saniour, Marie Poirier-Quinot, Laurène Jourdain, Gilles Authelet, Bertrand Baudouy |
|---|---|
| Přispěvatelé: | Laboratoire d’imagerie biomédicale multimodale [Orsay] (BioMaps), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), LaBoratoire d'Imagerie biOmédicale MultimodAle Paris-Saclay (BIOMAPS), Service Hospitalier Frédéric Joliot (SHFJ), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Cryostat Temperature control Materials science business.industry [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging Resonance Liquid nitrogen 01 natural sciences Imaging phantom 010305 fluids & plasmas Electromagnetic coil 0103 physical sciences Optoelectronics business Pulse tube refrigerator Instrumentation Radiofrequency coil |
| Zdroj: | Review of Scientific Instruments Review of Scientific Instruments, American Institute of Physics, 2020, 91 (5), pp.055106. ⟨10.1063/1.5143107⟩ Review of Scientific Instruments, 2020, 91 (5), pp.055106. ⟨10.1063/1.5143107⟩ |
| ISSN: | 0034-6748 1089-7623 |
| DOI: | 10.1063/1.5143107⟩ |
| Popis: | International audience; Small-sized High Temperature Superconducting (HTS) radiofrequency coils are used in a number of micro-magnetic resonance imaging applications and demonstrate a high detection sensitivity that improves the signal-to-noise ratio. However, the use of HTS coils could be limited by the rarity of cryostats that are suitable for the MR environment. This study presents a magnetic resonance (MR)-compatible and easily operated cryogen-free cryostat based on the pulse tube cryocooler technology for the cooling and monitoring of HTS coils below the temperature of liquid nitrogen. This cryostat features a real-time temperature control function that allows the precise frequency adjustment of the HTS coil. The influence of the temperature on the electrical properties, resonance frequency (f0), and quality factor (Q) of the HTS coil was investigated. Temperature control is obtained with an accuracy of over 0.55 K from 60 K to 86 K, and the sensitivity of the system, extracted from the frequency measurement from 60 K to 75 K, is of about 2 kHz/K, allowing a fine retuning (within few Hz, compared to 10 kHz bandwidth) in good agreement with experimental requirements. We demonstrated that the cryostat, which is mainly composed of non-magnetic materials, does not perturb the electromagnetic field in any way. MR images of a 10 × 10 × 15 mm3 liquid phantom were acquired using the HTS coil as a transceiver with a spatial resolution of 100 × 100 × 300 µm3 in less than 20 min under experimental conditions at 1.5 T. |
| Databáze: | OpenAIRE |
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