A Spectral-Scanning Nuclear Magnetic Resonance Imaging (MRI) Transceiver
An integrated spectral-scanning nuclear magnetic resonance imaging (MRI) transceiver is implemented in a 0.12 mum SiGe BiCMOS process. The MRI transmitter and receiver circuitry is designed specifically for small-scale surface MRI diagnostics applications where creating low (below 1 T) and inhomogeneous magnetic field is more practical. The operation frequency for magnetic resonance detection and analysis is tunable from 1 kHz to 37 MHz, corresponding to 0-0.9 T magnetization for ^1H (hydrogen). The concurrent measurement bandwidth is approximately one frequency octave. The chip can also be used for conventional narrowband nuclear magnetic resonance (NMR) spectroscopy from 1 kHz up to 250 MHz. This integrated transceiver consists of both the magnetic resonance transmitter which generates the required excitation pulses for the magnetic dipole excitation, and the receiver which recovers the responses of the dipoles.
© Copyright 2009 IEEE. Manuscript received March 18, 2008; revised February 23, 2009. Current version published May 28, 2009. The authors would like to thank IBM Corporation for providing access to the 8 HP BiCMOS process used in this project, and Hua Wang for technical feedback.
Published - Hassibi2009p4588Ieee_J_Solid-St_Circ.pdf