XFdtd EM simulation software updated with enhancements for magnetic resonance
XFdtd Bio-Pro provides users with a bundled collection of important biomedical EM calculation capabilities such as Specific Absorption Rate (SAR) analysis, VariPose mesh repositioning, and Hearing Aid Compatibility (HAC).
The Birdcage tool provides the ability to quickly build an MR birdcage coil and prepare it for simulation. A series of tabs guides users through the process of entering specifications and geometric details such as resonant frequency, waveform, capacitors, and number of sources to excite the structure. Upon completion, the tool creates the specified geometry and also creates and attaches all necessary circuit components, creates and/or assigns the waveform, and sets source phases and time delays. Designs include High Pass, Band Pass, Low Pass, and Source-Driven Homogeneous.
The software also features MR-related output types of MR Transmit Efficiency and Approximate MR Image. These new output types provide additional data when analyzing medical imaging simulations. MR Transmit Efficiency is proportional to the signal-to-noise ratio (SNR) for an MR birdcage, a single loop, or a specific set of amplitudes and phases for an MR phased array. The Approximate MR Image is a representation of the actual image generated by the coil, based on the rotating B-field output (B1+) and the water ratio data of the biological tissues in the simulation.
James Stack, Remcom’s training, applications and consulting manager, said, “Because FDTD has been identified as the favored method for bio-EM calculations, we’ve invested a great deal of time researching this market, learning about its most pressing problems, and adding features to XFdtd that our customers request. The new release reflects our recent focus on improving the efficiency of the birdcage definition process, helping users to prepare the structure correctly by presenting all the critical parameters in one place. The addition of the MR output types and tissue parameters are meant to give users even more options for achieving highly realistic results earlier in the process.”
In addition to the bio-EM features, all versions of XFdtd now include a new tool called the XFdtd Assistant. The Assistant is a step-by-step guide for new users that significantly reduces the learning curve and enables them to progress from a blank project to simulated results quickly and easily. Each tab on the Assistant leads the user through the project creation process with descriptive text that explains each step and links to menus appropriate for that task. As each step is completed, the Assistant adds a check mark on the tab. Experienced users may simply turn the Assistant off, if desired.
Other usability and performance improvements include reduction of memory requirements for steady-state computations when using XStream and other streamlined processes.
www.remcom.com/xf7-latest-enhancements
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