Optimised real time catheter tracking on a conventional MR Scanner
| Autor: | Reiner Umathum, Wolfhard Semmler, Steffen Volz, Sven Zühlsdorff, Michael Bock, H. J. Zabel |
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| Rok vydání: | 2001 |
| Předmět: |
Scanner
medicine.diagnostic_test Computer science Interventional magnetic resonance imaging business.industry ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Process (computing) Magnetic resonance imaging General Medicine Iterative reconstruction Tracking (particle physics) Software Personal computer medicine Computer vision Artificial intelligence business |
| Zdroj: | CARS |
| ISSN: | 0531-5131 |
| DOI: | 10.1016/s0531-5131(01)00208-4 |
| Popis: | Commercial high-field magnetic resonance (MR) scanners are generally not equipped with measurement software and hardware to perform interventional studies with active devices that contain small radiofrequency (rf) coils for localisation. In this study, with only minimal modifications to the MR scanner, the active catheter tracking technique is implemented on a clinical MR system. Small rf-coils are attached to a commercial angiography catheter and the movement of the coils is observed with fast MR tracking and imaging techniques. Optimised imaging strategies are explored for both static and moving anatomical regions. Image calculation and display software is implemented using both the MR scanner's fast image reconstruction processor, together with the main console computer and a separate personal computer. With the current implementation, image update rates of up to several Hertz can be achieved, if a roadmap imaging technique is used, where rapid coordinate updates are projected onto previously acquired overview images. To account for cardiac and breathing motion, an interleaved imaging strategy is presented where coordinate and image updates are acquired in rapid succession. With this approach, image update rates of 1–2 Hz are obtained, depending on the details of the image reconstruction process. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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