The configuration of open-bore scanners places different constraints on the design of gradient, shim, and radio-frequency coils. As can be seen in the cross-section (left), a patient in an open scanner lies between the magnet poles rather than within a cylinder. The corresponding gradient coil...
The aim of this study was to assess the current situation of CT use in Japan, and to investigate variations in radiation exposure in CT studies among institutions and scanners. Methods: Data-sheets were sent to all 126 hospitals and randomly selected 14 (15%) of 94 clinics in Gunma ...
Centre for Medical Image Computing (CMIC), Medical Physics and Biomedical Engineering Department, University College London, London, UK Slawomir Kusmia & Ferran Prados Epilepsy Society MRI Unit, Chalfont St Peter, UK Slawomir Kusmia Division of Clinical Behavioral Neuroscience, Department of Pediatrics...
Vertical MRI scanners which have a 90° rotated transmit coil generate fundamentally different electric and magnetic field distributions, yet very little is known about RF heating of implants in this class of scanners. We performed numerical simulations as well as phantom experiments to compare RF ...
The successful candidate would benefit from the full range of knowledge, expertise and equipment they have throughout the group, including advanced diagnostic imaging (CT scanner, visiting MRI scanner), doppler echocardiography and flexible/rigid endoscopes, direct radiography suites, ultrasound scanners, ...
The T1w MRI data were collected on 1.5-Tesla and 3-Tesla MR scanners. All data are high-resolution (e.g., 1 mm3or higher), with the exception of four cohorts who have at least one dimension with a resolution between 1–2 mm3(R027, R047, R049, R050). Each cohort was collected ...
MRI was performed on 3T scanners, either Prisma (Siemens Healthineers; 90 participants, 6 sites) or MR750 (General Electric; 10 participants, 1 site). Scan sessions included volumetric T1-weighted and T2-weighted structural MRI sequences, 1 diffusion MRI sequence, and 4 repetitions of a ...
MRI Acquisition Parameters We acquired MRI data using one of two 3T scanners (MAGETOM Skyra [Siemens Healthcare] and uMR 790 [United Imaging Healthcare]) with 32-channel head coils. To minimize motion artifacts, participants were kept in a supine position while wearing earplugs, and a foam ...
Although it is noteworthy that magnetic resonance imaging (MRI) can provide reliable evaluation of skeletal muscle volumes, the MRI scanners are very expensive, may be affected by little movements of animals, and may require the use of contrast agents. Thus ultrasound sonography may appear as a ...
MRI acquisition parameters. Resting-state functional MRI (rs-fMRI) Blood Oxygenation Level Dependent (BOLD) data were acquired on GE (GE Medical Systems, Milwaukee, WI) or Siemens (Siemens Healthcare, Erlangen, Germany) 3 Tesla MR scanners. BOLD signal was obtained with T2*-weighted echo ...