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Abstract #1302

Evaluation of an MR compatible head fixation device using a custom-made 3D printed frame in combination with a thermoplastic head mask

Daniel Gllmar 1 , Karl-Heinz Herrmann 1 , Clemens Grtner 1,2 , Nico Banz 3 , Thomas G Wendt 3 , and Jrgen R Reichenbach 1

1 Medical Physics Group, Institute of Diagnostic and Interventional Radiology I, Jena University Hospital - Friedrich Schiller University Jena, Jena, Germany, 2 Medical Engeneering and Biotechnology, University of Applied Sciences, Jena, Germany, 3 Department of Radiotheraphy and Radiooncology, Jena University Hospital - Friedrich Schiller University Jena, Jena, Germany

Head fixation using a custom-made frame in combination with a thermoplastic head mask was evaluated in terms of repositioning accuracy as well as degree of immobilization. In back-to-back scans regular fixation using clamps performed equally well compared to mask fixation. Repositioning accuracy using mask fixation was found to be very high (< 0.2mm, < 0.2). Under heavy motion the degree of immobilization did not exceed 1.5 mm in translation and 1.5 in rotation. The approach can be used to acquire MR scans which require minimal head motion during very long scan times (e.g. DTI, fMRI, Perfusion, high-res anatomy scans).

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