INTEGRATED RADIOFREQUENCY (RF) BODY COIL AND GRADIENT COIL
Publication Date: 2017-Jan-18
The IP.com Prior Art Database
A technique for integrating a radiofrequency (RF) body coil and gradient coil of a magnetic resonance imaging scanner is proposed. According to the proposed technique, an integrated tube structure with the gradient coil is disposed on the outer diameter (OD) of the tube structure and the RF body coil is disposed on the inner diameter (ID) of the tube structure. Advantageously, the integrated design maintains system performance and increases reliability while using fewer parts making the proposed technique very cost effective.
The present disclosure relates generally to magnetic resonance imaging scanner and more particularly to a technique for integrating radiofrequency body coil and gradient coil.
Generally, a magnetic imaging scanner comprises a main magnet for polarizing a sample, shim coils for correcting inhomogeneities in the main magnetic field, a gradient coil system and a radiofrequency (RF) coil system. The gradient coils are used to produce controlled variations in the main magnetic field (B0) to provide spatial localization of the signals and to apply reversal pulses in some imaging techniques. The RF coils receive and/or transmit the RF signal.
Further, the RF T/R (transmit/receive) coils are designed to optimize the SNR from a given region of the body. A body coil is installed in the magnet and functions both as transmit and receive coil. The body coil has a large measurement field, but does not have the high signal to noise ratio (SNR) of other special coils. However, when specific receive-only coils are used in the MRI scanner, the body coil serves as the transmit coil.
Also, typically as depicted in Figure 1, MRI scanners comprise separate RF and gradient coils. Systems comprising separate RF coils and gradient coils suffer various disadvantages, such as parts cost, floor space requirement for assembly and inventory, and labor costs, due to number of body parts.
As depicted in Figure 2, one conventional technique split an integrated RF-Gradient coil with a RF cavity concept. However, such split using RF cavity results in significant compromise in MRI system performance.
It would be desirable to have an improved technique for integrating radiofrequency body coil and gradient coil.
BRIEF DESCRIPTION OF DRAWINGS
Figure 1 depicts a typical magnetic resonance imaging (MRI) scanner comprising separate RF and gradient coils.
Figure 2 depicts a conv...