Related Experiment Video
Updated: Jun 26, 2026

MRM Microcoil Performance Calibration and Usage Demonstrated on Medicago truncatula Roots at 22 T
Published on: January 16, 2021
Transmission line effects on the coil noise correlation matrix in MRI
1Department of Radiology, Weill Medical College of Cornell University, New York, NY 10022, USA. ryb2001@med.cornell.edu
Abstract:
Noise correlation is an important topic in radiofrequency (RF) coil design for magnetic resonance imaging (MRI). The original noise correlation formula derived by Redpath showed correlation depends on the real part of the inverse impedance matrix. In this work, we introduce a more generalized formula to include effects from transmission lines and preamplifier input impedance mismatch. This formula is used to calculate correlation between two-channel circuits connected to preamplifiers using transmission lines of variable electrical length. The calculated correlation matches well with that measured on the MR scanner and suggests transmission line length can be utilized as an additional degree of freedom for coil decoupling, and can be adjusted to achieve zero noise correlation.
Related Concept Videos
Magnetic Resonance Imaging
Magnetic Field Due to Two Straight Wires
Magnetic Field Due To A Thin Straight Wire
Transmission Line Design Considerations
Imaging Studies IV: Magnetic Resonance Imaging
Imaging Studies for Cardiovascular System IV: CMRI

