Determination of appropriate RF blocking impedance for MRI surface coils and arrays
| Autor: | Armen Kocharian, Joel P. Felmlee, Phillip J. Rossman, Thomas C. Hulshizer, Stephen J. Riederer |
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| Rok vydání: | 2000 |
| Předmět: |
Electromagnetic field
Materials science Radiological and Ultrasound Technology Electromotive force Phantoms Imaging Radio Waves Phased array Blocking (radio) Image quality Acoustics Physics::Medical Physics Biophysics Process (computing) Magnetic Resonance Imaging Biophysical Phenomena Nuclear magnetic resonance Electromagnetic coil Electric Impedance Image Processing Computer-Assisted Humans Radiology Nuclear Medicine and imaging Electrical impedance |
| Zdroj: | Magnetic Resonance Materials in Biology, Physics, and Medicine. 10:80-83 |
| ISSN: | 1352-8661 |
| DOI: | 10.1016/s1352-8661(00)00071-5 |
| Popis: | Surface and phased array receiving coils in MRI typically require that RF excitation be accomplished using the body coil. This process requires that the receiving coils contain blocking circuitry to increase the overall circuit impedance during RF excitation and withstand the electromotive force induced by the applied electromagnetic field. The aim of this study was to determine the optimal impedance range required during RF excitation based on an assessment of image quality. The experimental results are fit by an exponential model and establish criteria that can be applied for general receiver coil design. |
| Databáze: | OpenAIRE |
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