  The advent of low field open magnetic resonance imaging (MRI) systems has
greatly expanded the accessibility of MRI technology to meet a wide range of
patient needs. However, the inherent challenges of low-field MRI, such as
limited signal-to-noise ratios and limited availability of dedicated RF coil,
have prompted the need for innovative coil designs that can improve imaging
quality and diagnostic capabilities. In response to these challenges, we
introduce the coupled stack-up volume coil, a novel RF coil design that
addresses the shortcomings of conventional birdcage in the context of low field
open MRI. The proposed coupled stack-up volume coil design utilizes a unique
architecture that optimizes both transmit/receive efficiency and RF field
homogeneity and offers the advantage of a simple design and construction,
making it a practical and feasible solution for low field MRI applications.
This paper presents a comprehensive exploration of the theoretical framework,
design considerations, and experimental validation of this innovative coil
design. Through rigorous analysis and empirical testing, we demonstrate the
superior performance of the coupled stack-up volume coil in achieving improved
transmit/receive efficiency and more uniform magnetic field distribution
compared to traditional birdcage coils.
