Erik-Jan Rijkhorst

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Respiratory motion is a challenging factor for image acquisition and image-guided procedures in the abdominal and thoracic region. In order to address the issues arising from respiratory motion, it is often necessary to detect the respiratory signal. In this article, we propose a novel, purely image-based retrospective respiratory gating method for(More)
Liver blood vessel movement information is important for improving the accuracy of minimally invasive therapies such as high intensity focused ultrasound and radio frequency ablation. In this paper, we present a rigid registration of centerlines obtained from multiscale vessel enhanced liver images to understand the movement of liver during breathing cycle.(More)
PURPOSE To quantify the effects of respiratory motion on high-intensity focused ultrasound heating of liver tissue by comparing the simulated ablation using a conventional respiratory gating versus a MR-model-based motion compensation approach. METHODS To measure liver motion, dynamic free-breathing abdominal MR scans were acquired for five volunteers.(More)
OBJECTIVES Additively manufactured bone models, implants and drill guides are becoming increasingly popular amongst maxillofacial surgeons and dentists. To date, such constructs are commonly manufactured using CT technology that induces ionizing radiation. Recently, ultrashort echo time (UTE) MRI sequences have been developed that allow radiation-free(More)
In image-guided cardiac interventions, respiratory motion causes misalignments between the pre-procedure roadmap of the heart used for guidance and the intra-procedure position of the heart, reducing the accuracy of the guidance information and leading to potentially dangerous consequences. We propose a novel technique for motion-correcting the(More)
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