© The Institution of Engineering and Technology
Magnetic resonance (MR) signals captured by RF array coils should be delivered to analogue-to-digital converter (ADC) channels through an independent receiver (Rx) circuitry for precise MRI process. Since different types of RF coils should be utilised by a fixed port configuration on a patient table with a limited number of ADC channels, a highly flexible Rx front-end design is necessary. In this Letter, a compact distributed switch matrix structure for multi-channel RF coil Rx is proposed for supporting different types of array coils with small circuit size and sufficient reconfigurability. The proposed structure is configured by a multiple number of unit matrix cells consisting of a single double pole double throw and two single pole double throw RF switches to control the pathways of received MR signals. The proposed structure was implemented and verified at 9.4-Tesla (9.4 T) MR frequency (400 MHz) by comparing different RF path losses.
References
-
-
1)
-
1. Dale, B.M., Brown, M.A., Semelka, R.C.: ‘MRI basic principles and applications’ (Wiley Blackwell, Hoboken, NJ, USA, 2015, 5th edn.).
-
2)
-
5. Lee, H.L.: ‘Reconfigurable multi-channel RF crossbar switch matrix for MRI receiver front-end’, IET. Electron. Lett., 2017, 53, (6), pp. 380–381 (doi: 10.1049/el.2016.4489).
-
3)
-
3. Graessl, A., Renz, W., Hezel, F., et al: ‘Modular 32-channel transceiver coil array for cardiac MRI at 7T’, Magn. Reson. Med., 2014, 72, (1), pp. 276–290 (doi: 10.1002/mrm.24903).
-
4)
-
2. Hardy, C.J., Giaquinto, R.O., Piel, J.E., et al: ‘128-channel body MRI with a flexible high-density receiver-coil array’, J. Magn. Reson. Imaging, 2008, 28, (5), pp. 1219–1225 (doi: 10.1002/jmri.21463).
-
5)
-
4. Kröckel, H.: ‘Switching matrix with two control inputs at each switching element’. .
-
6)
-
6. Ghon, H.-S.: ‘Method and apparatus for acquiring image in magnetic resonance imaging system’. .
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2018.6579
Related content
content/journals/10.1049/el.2018.6579
pub_keyword,iet_inspecKeyword,pub_concept
6
6