A Flexible and Modular Receiver Coil Array for Magnetic Resonance Imaging

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • National Taiwan University

Abstract

We propose a flexible form-fitting MRI receiver coil array assembled by individual coil modules. This design targets MRI applications requiring a receiver array conforming to the anatomy of various shapes or sizes. Coil modules in our proposed array were arranged with gaps between them. Each coil module had a circumferential shielding structure stacked on top of the coil. Together they achieve robust decoupling when the array was bent differently. Two types of the circumferential shielding structure were investigated by using full-wave electromagnetic simulations and imaging experiments. Results showed that our flexible coil array had good decoupling between coils whether they were on a flat or curved surface with the S21 magnitude ranged between -18.1 dB and -19.9 dB in simulations, and with the average of off-diagonal entries of the noise correlation matrix less than 0.047 in experimental measurements. Anatomical images of human brain, calf, and knee were acquired by our seven-channel prototype on a 3T MRI system. The maximal and the average SNR within 50 mm from our array surpassed those from the commercial 32-channel head and 4-channel flexible coil arrays by 2.63/1.35-fold and 3.89/1.50-fold, respectively.

Details

Original languageEnglish
Article number8478795
Pages (from-to)824-833
Number of pages10
JournalIEEE Transactions on Medical Imaging
Volume38
Issue number3
Early online date1 Jan 2018
Publication statusPublished - Mar 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Capacitors, circumferential shielding, coil array, Electromagnetics, flexible, Magnetic resonance imaging, magnetic resonance imaging (MRI), modular, mutual coupling, Phantoms, Receivers, Signal to noise ratio

ID: 28771046