An embedded optical tracking system for motion-corrected magnetic resonance imaging at 7T
Autor: | Enrico Reimer, Thomas Siegert, Christian Labadie, Michael Herbst, Maxim Zaitsev, Julian Maclaren, Jessica Schulz, Robert Turner |
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Rok vydání: | 2012 |
Předmět: |
Optics and Photonics
Time Factors Computer science ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Biophysics Motion capture Motion (physics) Motion Imaging Three-Dimensional Motion artifacts Image Processing Computer-Assisted medicine Humans Radiology Nuclear Medicine and imaging Computer vision Models Statistical Radiological and Ultrasound Technology medicine.diagnostic_test Phantoms Imaging business.industry Brain Optical Devices Magnetic resonance imaging Tracking system Equipment Design Magnetic Resonance Imaging Mr imaging Optical tracking Calibration Prospective motion correction Artificial intelligence business Algorithms |
Zdroj: | Magnetic Resonance Materials in Physics, Biology and Medicine. 25:443-453 |
ISSN: | 1352-8661 0968-5243 |
Popis: | Prospective motion correction using data from optical tracking systems has been previously shown to reduce motion artifacts in MR imaging of the head. We evaluate a novel optical embedded tracking system.The home-built optical embedded tracking system performs image processing within a 7 T scanner bore, enabling high speed tracking. Corrected and uncorrected in vivo MR volumes are acquired interleaved using a modified 3D FLASH sequence, and their image quality is assessed and compared.The latency between motion and correction of the slice position was measured to be (19 ± 5) ms, and the tracking noise has a standard deviation no greater than 10 μm/0.005° during conventional MR scanning. Prospective motion correction improved the edge strength by 16 % on average, even though the volunteers were asked to remain motionless during the acquisitions.Using a novel method for validating the effectiveness of in vivo prospective motion correction, we have demonstrated that prospective motion correction using motion data from the embedded tracking system considerably improved image quality. |
Databáze: | OpenAIRE |
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