Radio Frequency Probe for Improvement of Signal to Noise Ratio in Magnetic Resonance Image with Inductively Coupled Wireless Coil
نویسندگان
چکیده
An inductively coupled wireless coil for a bidirectional radio frequency (RF) probe coil has been designed to improve the signal to noise ratio (SNR) in the magnetic resonance image (MRI). A birdcage type of a primary coil and a Helmholtz type of a wireless secondary coil was manufactured. The coils were applied to a phantom study with a 3 T MRI system. SNR was calculated in the magnetic resonance images. The experimental results show that the designed coils are effective to increase SNR and to decrease the mean RF power. The low RF power decreases a specific absorption rate to a subject at high frequency of resonance.
منابع مشابه
Non-uniformity of Clinical Head, Head and Neck, and Body Coils in Magnetic Resonance Imaging (MRI)
Introduction Signal intensity uniformity in a magnetic resonance (MR) image indicates how well the MR imaging (MRI) system represents an object. One of the major sources of image non-uniformity in high-field MRI scanners is inhomogeneity of radio-frequency coil. The aim of this study was to investigate non-uniformity in head, head and neck, and body coils and compare the obtained results to det...
متن کاملWireless Radio Frequency Coil for Magnetic Resonance Image of Knee Joint
An inductively coupled wireless radio frequency (RF) coil has been developed to improve the quality in the magnetic resonance imaging. The wireless coils of a Helmholtz type and a birdcage type were manufactured, and the resonance frequency was tuned at 64 MHz. Several magnetic resonance images were taken on a phantom, on a rabbit’s head and on a human knee joint with the RF coils. The signal t...
متن کاملDesigning and Fabrication of a New Radiofrequency Planar microcoil for mini-Nuclear Magnetic Resonance
Introduction Radiofrequency planar microcoils are used to increase the resolution of magnetic resonance images of small samples. In this study, we aimed to design and fabricate a spiral planar microcoil constructed on a double-sided printed circuit board (PCB). It has four rings with an internal diameter of 241 microns tuned and matched at 63.8 MHz. Materials and Methods To achieve the maximum ...
متن کاملImproving signal-to-noise ratio in transcranial magnetic resonance guided focused ultrasound
Background/introduction Signal-to-Noise Ratio (SNR) can be increased in Magnetic Resonance Imaging (MRI) using Radio Frequency (RF) coils. Of all the options for increasing SNR, coils provide the greatest gains for the dollars spent. Coils for 1.5 and 3 Tesla MRI systems consist of conductive loops that are tuned to resonate at the fundamental frequency associated with the field strength of the...
متن کاملFeasibility and benefit of using a cryogenic radiofrequency coil for functional cardiac magnetic resonance imaging of mice at 9.4 T
Background Cardiac morphology and function assessment by MRI is of increasing interest for a variety of mouse models in pre-clinical research. Signal-to-noise ratio (SNR) constraints, however, limit image quality and blood myocardium delineation, which crucially depend on high spatial resolution. Significant gains in SNR can be achieved with a cryogenically cooled RF probe. This study examines ...
متن کامل