The advantages of array coil imaging in human whole-body MR systems are well known and have gained relevance in many applications and MR techniques. In the field of small-animal studies, this concept has become increasingly important. In this work, three different phased-array coils for performing MRI on mice are presented. For imaging at 300 MHz, a four-channel receive-only phased-array coil is introduced. One two-channel and a four-channel transmit/receive setup operating at 750 MHz show the feasibility of array coil imaging at 17.6 T. All of these coils show excellent performance and deliver high-quality MR images of mice.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1002/nbm.1156 | DOI Listing |
Radiologia (Engl Ed)
October 2024
Sección de Radiología Abdominal, Servicio de Radiodiagnóstico, Hospital Universitario Central de Asturias (HUCA), Oviedo, Asturias, Spain.
Magnetic resonance enterography is primarily indicated for inflammatory bowel diseases. The study of the gastrointestinal tract using MRI has become feasible due to the emergence of ultrafast sequences with higher spatial resolution and phased-array coils enabling wider fields of view. However, to ensure the quality of the examination, it is essential to have prior preparation with oral or rectal contrast to distend the lumen and improve the definition of the intestinal wall.
View Article and Find Full Text PDFInt J Numer Method Biomed Eng
December 2024
Electrical and Electronics Engineering Department, Middle East Technical University, Ankara, Türkiye.
This study investigates the pulse compression technique to improve the performance of magneto-acousto-electrical tomography (MAET) with magnetic field measurements through numerical studies. Emphasizing the effects of specific coil configuration on MAET measurements, the study conducts evaluations using a linear phased array (LPA) transducer and numerical breast models with tumor inclusion. It provides feasibility and a detailed comparative analysis of various excitations, including linear frequency modulated (LFM), Barker code, and Golay code excitations in MAET.
View Article and Find Full Text PDFMagn Reson Med
February 2024
Department of Radiology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China.
Purpose: To investigate the application of a metasurface-inspired wireless coil and evaluate its performance in clinical knee MRI.
Methods: A metasurface surface coil is designed for knee MRI at 1.5T.
Magn Reson Med
December 2023
Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA.
Purpose: A 128-channel receive-only array for brain imaging at 7 T was simulated, designed, constructed, and tested within a high-performance head gradient designed for high-resolution functional imaging.
Methods: The coil used a tight-fitting helmet geometry populated with 128 loop elements and preamplifiers to fit into a 39 cm diameter space inside a built-in gradient. The signal-to-noise ratio (SNR) and parallel imaging performance (1/g) were measured in vivo and simulated using electromagnetic modeling.
Radiology
August 2023
From the Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70th St, New York, NY 10021 (D.B.S., F.A., H.G.P., M.F.K., E.T.T.); Department of Radiology, New York University Grossman School of Medicine, New York, NY (J.F.); Department of Radiology, University of California San Diego, La Jolla, Calif (C.B.C.); Radiology Service, Veterans Affairs San Diego Healthcare System, La Jolla, Calif (C.B.C.); and Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, Calif (V.P.).
Over the past decades, MRI has become increasingly important for diagnosing and longitudinally monitoring musculoskeletal disorders, with ongoing hardware and software improvements aiming to optimize image quality and speed. However, surging demand for musculoskeletal MRI and increased interest to provide more personalized care will necessitate a stronger emphasis on efficiency and specificity. Ongoing hardware developments include more powerful gradients, improvements in wide-bore magnet designs to maintain field homogeneity, and high-channel phased-array coils.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!