Measurement of End-to-End latency in real-time MRI
Philip Schaten1, Mueed Azhar2, Ansgar Adler3, Michael Steinmetz2,4,5, and Martin Uecker1,3,4
1Institute for Diagnostic and Interventional Radiology of the University Medical Center Göttingen, Göttingen, Germany, 2Department of Pediatric Cardiology of the University Medical Center Göttingen, Göttingen, Germany, 3Institute of Medical Engineering, Graz University of Technology, Graz, Austria, 4DZHK (German Centre for Cardiovascular Research), Partner Site Göttingen, Göttingen, Germany, 5Goettingen Heart Center, University Medical Center Göttingen, Göttingen, Germany
For interventional MRI-guided applications image reconstruction should be without delay to avoid unwanted failure. Since latency is unavoidable it is very important to know it beforehand. For this reason, we present a new method to measure the latency of real-time MRI systems.
The main components are two inexpensive optical cameras. No modification of the scanner system is required. Different validations show that our method works reliably. Results from our RT MRI system provide insight into the latency of different protocols. We believe that we have found an inexpensive, easy, and robust way of determining RT MRI latency.
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