The first task to be found in the navigation tree is a transient simulation of the Empty Coil. Here you have various blocks that can be used to setup simulation project tasks. The project opens with the schematic view of the master project.

The coil is driven by two discrete ports positioned at a 90° angle, which excites the required rotating field.Ī Video by the University Magdeburg gives an overview of the MRI system. Lumped capacitors are used to tune the coil to the required 63 MHz. The model consists of a cylindrical shield and a typical bird-cage coil. The other aspects of MRI can be tackled with the magnetostatic solver or the magneto-quasistatic solver of CST EM Studio. This simplified example only focuses on the RF part at 63 MHz in the body-coil and uses the transient solver of CST Microwave Studio. Finally additional gradient coils, operating in the kHz range, are used for the positioning the point of resonance inside the body. The field generating so-called ”body-coil” is supposed to offer a homogeneous field distribution all over the body. The nuclear resonance itself is excited at the protons intrinsic resonance of 63 MHz (dependent on the static field) with a magnetic field rotating around the axis of the magnetostatic axis (z-axis in this example). For the MRI device used in this example this biasing magnetic field strength is 1.5 Tesla, which is a typical value for clinical MRI devices. The procedure involves strong magnetic fields at different frequencies and with different orientations, which implies quite a challenge for the design of the device.įirst of all a very strong static magnetic field aligns all magnetic moments in the body. Magnetic Resonance Imaging (MRI) uses the magnetic moments of protons to generate detailed 3D pictures of the inside of the human body for medical purposes with relatively low side-effects. We thank the Institute of Biometrics and Medical Informatics, Otto von Guericke University Magdeburg, Germany for generously providing the MRI coil setup and the housing.

For disk space reasons the 2D/3D and simulation project results are not provided, but they can be easily obtained by just pressing Update in the Home ribbon (CTRL-F5). It contains both RF and thermal simulation tasks. This example contains a System Assembly and Modeling setup which allows you an integrated workflow for running various simulations either with the empty coil, a homogeneous phantom or anatomically correct human voxel models. Magnetic Resonance Imaging System Magnetic Resonance Imaging System

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