Automatic Resonance Frequency Retuning of Stretchable Liquid Metal Receive Coil for Magnetic Resonance Imaging
| Autor: | Josip Marjanovic, Andreas Mehmann, Andreas Port, Benjamin Sporrer, Matija Varga, Klaas P. Pruessmann, Jonas Reber, Gerhard Tröster, Christian Vogt, Qiuting Huang |
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| Rok vydání: | 2019 |
| Předmět: |
Male
Neoprene Scanner Frequency response Materials science Settling time Acoustics Controller (computing) Signal-To-Noise Ratio Imaging phantom 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Signal-to-noise ratio medicine Humans Electrical and Electronic Engineering Radiological and Ultrasound Technology medicine.diagnostic_test Phantoms Imaging Magnetic resonance imaging Equipment Design Magnetic Resonance Imaging Computer Science Applications Metals Electromagnetic coil Female Software |
| Zdroj: | IEEE Transactions on Medical Imaging. 38:1420-1426 |
| ISSN: | 1558-254X 0278-0062 |
| Popis: | Stretchable magnetic resonance (MR) receive coils show shifts in their resonance frequency when stretched. An in-field receiver measures the frequency response of a stretchable coil. The receiver and coil are designed to operate at 128 MHz for a 3T MR scanner. Based on the measured frequency response, we are able to detect the changes of the resonance frequency of the coil. We show a proportional-integral-derivative controller that tracks the changes in resonance frequency and retunes the stretchable coil. The settling time of the control loop is less than 3.8ms. The retuning system reduces the loss in signal-to-noise ratio of phantom images from 1.6 dB to 0.3 dB, when the coil is stretched by 40% and the coil is retuned to 128 MHz. |
| Databáze: | OpenAIRE |
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