A Method for Eddy Current Field Measurement in Permanent Magnet Magnetic Resonance Imaging Systems
Magnetic resonance imaging (MRI) is a widely used medical imaging technique. In MRI system, gradient magnetic fields are used to code spatial information. However, the fast-switching electric currents in the gradients coils used to generate gradient fields also induce vortex electric field, often re...
| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
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Science Press
2018-03-01
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| Series: | Chinese Journal of Magnetic Resonance |
| Subjects: | |
| Online Access: | http://121.43.60.238/bpxzz/EN/10.11938/cjmr20172593 |
| _version_ | 1818197574256951296 |
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| author | SONG Rui HE Yan-fa ZHANG Bo |
| author_facet | SONG Rui HE Yan-fa ZHANG Bo |
| author_sort | SONG Rui |
| collection | DOAJ |
| description | Magnetic resonance imaging (MRI) is a widely used medical imaging technique. In MRI system, gradient magnetic fields are used to code spatial information. However, the fast-switching electric currents in the gradients coils used to generate gradient fields also induce vortex electric field, often referred as eddy current, in the surrounding metal conductors. In this paper, a method for eddy current field measurement was proposed. Based on the Faraday law of electromagnetic induction, an eddy current field measuring device was designed. Combining hardware acquisition and software processing, the eddy current field was obtained by subtracting the ideal gradient field from the magnetic field measured experimentally, whose waveform could be displayed in real time. The proposed method was verified by experimental results. |
| first_indexed | 2024-12-12T01:52:08Z |
| format | Article |
| id | doaj.art-2035865fbf2f4a34a14fdff8627d510e |
| institution | Directory Open Access Journal |
| issn | 1000-4556 1000-4556 |
| language | zho |
| last_indexed | 2024-12-12T01:52:08Z |
| publishDate | 2018-03-01 |
| publisher | Science Press |
| record_format | Article |
| series | Chinese Journal of Magnetic Resonance |
| spelling | doaj.art-2035865fbf2f4a34a14fdff8627d510e2022-12-22T00:42:27ZzhoScience PressChinese Journal of Magnetic Resonance1000-45561000-45562018-03-01351525910.11938/cjmr20172593A Method for Eddy Current Field Measurement in Permanent Magnet Magnetic Resonance Imaging SystemsSONG Rui0HE Yan-fa1ZHANG Bo2Faculty of Science, Northeastern University, Shenyang 110004, ChinaFaculty of Science, Northeastern University, Shenyang 110004, ChinaSino-Dutch biomedical and information engineering school, Northeastern University, Shenyang 110619, ChinaMagnetic resonance imaging (MRI) is a widely used medical imaging technique. In MRI system, gradient magnetic fields are used to code spatial information. However, the fast-switching electric currents in the gradients coils used to generate gradient fields also induce vortex electric field, often referred as eddy current, in the surrounding metal conductors. In this paper, a method for eddy current field measurement was proposed. Based on the Faraday law of electromagnetic induction, an eddy current field measuring device was designed. Combining hardware acquisition and software processing, the eddy current field was obtained by subtracting the ideal gradient field from the magnetic field measured experimentally, whose waveform could be displayed in real time. The proposed method was verified by experimental results.http://121.43.60.238/bpxzz/EN/10.11938/cjmr20172593magnetic resonance imaging (MRI)gradient coileddy current fieldmeasurement |
| spellingShingle | SONG Rui HE Yan-fa ZHANG Bo A Method for Eddy Current Field Measurement in Permanent Magnet Magnetic Resonance Imaging Systems Chinese Journal of Magnetic Resonance magnetic resonance imaging (MRI) gradient coil eddy current field measurement |
| title | A Method for Eddy Current Field Measurement in Permanent Magnet Magnetic Resonance Imaging Systems |
| title_full | A Method for Eddy Current Field Measurement in Permanent Magnet Magnetic Resonance Imaging Systems |
| title_fullStr | A Method for Eddy Current Field Measurement in Permanent Magnet Magnetic Resonance Imaging Systems |
| title_full_unstemmed | A Method for Eddy Current Field Measurement in Permanent Magnet Magnetic Resonance Imaging Systems |
| title_short | A Method for Eddy Current Field Measurement in Permanent Magnet Magnetic Resonance Imaging Systems |
| title_sort | method for eddy current field measurement in permanent magnet magnetic resonance imaging systems |
| topic | magnetic resonance imaging (MRI) gradient coil eddy current field measurement |
| url | http://121.43.60.238/bpxzz/EN/10.11938/cjmr20172593 |
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