Abstract #3843

MRI artifact simulation for clinically relevant MRI sequences for guidance of prostate HDR brachytherapy

Ellis Beld¹, Marinus A. Moerland¹, Max A. Viergever², Jan J.W. Lagendijk¹, and Peter R. Seevinck²

¹Department of Radiotherapy, University Medical Center Utrecht, Utrecht, Netherlands, ²Image Sciences Institute, University Medical Center Utrecht, Utrecht, Netherlands

Object localization by MRI artifact simulation and template matching is valuable for MRI-guided HDR brachytherapy. Simulations of the artifacts induced by an HDR brachytherapy source and titanium needle were implemented for four types of MRI sequences: spoiled gradient echo, spin echo, bSSFP and bSSFP-SPAIR. The simulated artifacts were compared to MR images acquired in a phantom study and applied for object localization. High correspondences between the simulations and MR images were found as well as only slight variations between the obtained object positions for all applied sequences. This enables object localization for clinically relevant MRI sequences which allow anatomy visualization.

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