Improving RF field strength and uniformity in a local region by controlling individual transmitting RF phase in a 7T tranceive array coil

A study on multiple array method of birdcage coils to improve the signal intensity and homogeneity in small‐animal whole‐body magnetic resonance imaging at 7 T

“…29 When the signal pathway was set to Tx mode, the Tx power signal from the single RF power amplifier was transmitted to the input Tx/Rx switching circuit through the RG-316 nonmagnetic coaxial cable via the two-way RF power divider. The hl-BC and tl-BC coils were operated by a single channel, whereas the o-BC, nog-BC, and nodc-BC coils were excited using an RF power divider.…”

“…All electronics were combined with the ODU (ODU GmbH & Co. KG, Mühldorf, Germany) plug in the interfacing box. 29 When the signal pathway was set to Tx mode, the Tx power signal from the single RF power amplifier was transmitted to the input Tx/Rx switching circuit through the RG-316 nonmagnetic coaxial cable via the two-way RF power divider. In Rx mode, the 1 H signal from the biological sample was detected by the BC coil and passed through the output Tx/Rx switching circuit to a low input impedance preamplifier (noise figure: <0.5 dB, gain:~26 dB; Siemens Medical Solutions, Erlangen, Germany).…”

Recent Advances in Hybrid Molecular Imaging Systems

“…[1][2][3] MRI has become firmly established as a preferred diagnostic imaging tool following the substantial improvements made in both scan speed and image quality since its introduction to clinical practice in the early 1980s. [4][5][6] Nuclear medicine imaging methods that use radionuclides, such as positron emission tomography (PET) and singlephoton emission computed tomography (SPECT), offer highly sensitive and quantitative tools for the detection and localization of the biochemical and functional abnormalities associated with various diseases. In addition, molecular imaging techniques based on radionuclide imaging are the most sensitive methods that are readily translatable to clinical use.…”