Journal article
A flexible view ordering technique for high-quality real-time 2DFT MR fluoroscopy
Magnetic resonance in medicine, Vol.42(1), pp.69-81
07/1999
DOI: 10.1002/(SICI)1522-2594(199907)42:1<69::AID-MRM11>3.0.CO;2-Y
Abstract
A method to tailor the view order to the reconstruction cycle is introduced for real-time MRI. It is well known that view sharing and oversampling central k-space views can improve the temporal resolution of gradient-echo pulse sequences. By ordering phase-encodes to synchronize k-space acquisition with the reconstruction cycle, apparent temporal resolution can match the frame rate with as few as one-fourth of the phase-encodes sampled per reconstruction. Spatial resolution is maintained by periodically updating high spatial frequencies. In addition to apparent temporal resolution, three other criteria for real-time imaging are identified and evaluated: display latency, dispersion, and frame-to-frame consistency. Latency is minimized by ordering views in a reverse-centric manner within each reconstruction interval, sampling high-energy views immediately prior to beginning reconstruction. Dispersion is kept low and consistent by synchronizing acquisition and reconstruction, thus avoiding poorly timed reconstruction instances. Real-time implementation demonstrates pulsatile time-of-flight blood signal enhancement in humans.
Details
- Title: Subtitle
- A flexible view ordering technique for high-quality real-time 2DFT MR fluoroscopy
- Creators
- Reed F. Busse - Mayo ClinicDavid G. Kruger - Mayo ClinicJosef P. Debbins - Mayo ClinicSean B. Fain - Mayo Clinic in FloridaStephen J. Riederer - Mayo Clinic
- Resource Type
- Journal article
- Publication Details
- Magnetic resonance in medicine, Vol.42(1), pp.69-81
- Publisher
- John Wiley & Sons, Inc
- DOI
- 10.1002/(SICI)1522-2594(199907)42:1<69::AID-MRM11>3.0.CO;2-Y
- ISSN
- 0740-3194
- eISSN
- 1522-2594
- Number of pages
- 13
- Language
- English
- Date published
- 07/1999
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Radiology; Health and Human Physiology; Electrical and Computer Engineering
- Record Identifier
- 9984275053902771
Metrics
7 Record Views