A 3-DOF MR-Compatible Device for Magic Angle Related In Vivo Experiments

A 10-mm MR-Conditional Unidirectional Pneumatic Stepper Motor

“…To evaluate the MR compatibility and safety of the presented pneumatic stepper motor, experiments were conducted in a GE 3T MRI scanner to quantify 1) the MR image artifact produced by the motor and 2) the SNR of the images when the stepper motor and electronic devices were in operation [16]. …”

Sub-pixel localisation of passive micro-coil fiducial markers in interventional MRI

“…The fiducial was mounted on an MRI-compatible three degree of freedom (3-DOF) remote manipulator arm [13] as shown in Fig. 1.…”

“…All images were acquired with a fast low angle shot (FLASH) sequence (TE = 4.8 ms, TR = 9.2 ms, slice thickness 5 mm, matrix 256 2 , FOV 280 mm, pixel size 1.1 mm, flip angle 1 • , bandwidth 390 Hz/pxl) and an axial slice located at the isocentre. The translation of the arm inside the scanner was controlled by an independent control system using optical encoders, with an accuracy of 0.08 mm along each axis [13]. Exported images in DICOM format were later processed on a separate PC using MatLab (Mathworks, Natick, MA, USA).…”

Overview of Short and UltrashortT2/T2* Echo Time (UTE) Imaging

“…21 However, as is apparent from Ref. 21, the cylindrical form of most MRI systems, with diameters of 70 cm or at best just a little more, places major restrictions on the range of studies that are possible. Most interest in this area of activity focuses on tendons and cartilage, and thus on the musculoskeletal system, though, currently, magic angle studies of many important structures are impracticable.…”