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This study introduced a localized approach for magnetic resonance microscopy (MRM) of adult zebrafish brain on our 3T MRI system. A micro-fabricated single-channel radiofrequency (RF) receiver coil was designed by using electromagnetic simulation. Using transmit-only and receive-only (TORO) configuration, receive-only surface coil can achieve high signal-to-noise ratio (SNR) at localized brain regions...
Dynamic contrast enhanced (DCE) MRI is a potential technique to monitor the temporal evolution of signal change for the specific tissue microcirculation or tumor angiogenesis. In this study, we implemented high-temperature superconducting (HTS) RF coil system on DCE application of in-vivo mice kidney metabolism. Compared to a conventional copper coil, the improvement of the signal-to-noise ratio (SNR)...
This study introduced a localized approach for magnetic resonance microscopy (MRM) of the rat brain. A single-loop radiofrequency (RF) receiver coil designed for micro-imaging was developed by using electromagnetic simulation software widely used in communication fields. With transmit-only and receive-only (TORO) configuration, receive-only surface coil can achieve higher signal-to-noise ratio (SNR)...
Whole-brain images were acquired with a 2times acceleration factor by using simultaneous multi-slice acquisition (SMA). Utilizing a Sinc pulse modulated by cosine/sine functions combined with an extra gradient along the slice-selection direction during acquisition, we are able to take multiple magnetic resonance images of different slice simultaneously. 2-slice and 4-slice SMA experiments were also...
To investigate the functional deficit of brain cortex in human ametropic amblyopia. Methods: The regional brain activation in ametropic amblyopia and healthy subjects evoked by visual stimuli of red-black and green-black chessboard patterns were detected by blood oxygenation level dependent-functional magnetic resonance imaging (BOLD-fMRI) based on block-design and event-related design. Results: The...
High-temperature superconducting (HTS) coil is one of the best ways to increase the signal-to-noise ratio (SNR). Bi2Sr2Ca2Cu3Ox (Bi-2223) tapes were suitable to use because of the easier fabrications and lower cost. In this study, we built HTS Bi-2223 tape coils and demonstrated that the SNR of using the HTS tape coil was 3 or 4 folds higher than that of the traditional copper coil for a rat brain...
One way to reduce receiving coil noise in MRI scans is using non-resistive high-temperature superconducting (HTS) coils. They show advantages of much lower cost and easier fabrication over HTS thin film coils. In this work, we built a 200 mm in diameter Bi2Sr2Ca2Cu3Ox (Bi-2223) tape HTS RF coil and demonstrated that the SNR of using the HTS tape coil was 2.22 folds higher than that of the traditional...
One way to reduce receiving coil noise in MRI scans is using non-resistive high-temperature superconducting (HTS) coils. They show advantages of much lower cost and easier fabrication over HTS thin film coils. In this work, we built a 200 mm in diameter Bi2Sr2Ca2Cu3Ox (Bi-2223) tape HTS RF coil and demonstrated that the SNR of using the HTS tape coil was 2.22 folds higher than that of the traditional...
High-temperature superconducting (HTS) coil is the reactance created by the inductive loop. A trimmer one of the best ways to increase the signal-to-noise ratio (SNR). Bi2Sr2Ca2Cu3Ox (Bi-2223) tapes were suitable to use because of the easier fabrications and lower cost. In this study, we built HTS Bi-2223 tape coils and demonstrated that the SNR of using the HTS tape coil was 3 or 4 folds higher than...
In this study, we attempt to reduce the magnetic resonance imaging (MRI) scan time by combining simultaneous multi-slice acquisition (SIMA) and blind source separation method in a phased array MR acquisition system. Imaging was first acquired by a typical parallel imaging MR with multi-slice excitation RF profile; this will end up with an overlapped image. By using blind source separation method which...
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