Undersampled projection-reconstruction imaging for time-resolved contrast-enhanced imaging

Autor:	K K, Vigen, D C, Peters, T M, Grist, W F, Block, C A, Mistretta
Rok vydání:	2000
Předmět:	Time Factors Phantoms Imaging Abdomen Contrast Media Feasibility Studies Humans Artifacts Algorithms Magnetic Resonance Angiography
Zdroj:	Magnetic resonance in medicine. 43(2)
ISSN:	0740-3194
Popis:	In time-resolved contrast-enhanced 3D MR angiography, spatial resolution is traded for high temporal resolution. A hybrid method is presented that attempts to reduce this tradeoff in two of the spatial dimensions. It combines an undersampled projection acquisition in two dimensions with variable rate k-space sampling in the third. Spatial resolution in the projection plane is determined by readout resolution and is limited primarily by signal-to-noise ratio. Oversampling the center of k-space combined with temporal k-space interpolation provides time frames with minimal venous contamination. Results demonstrating improved resolution in phantoms and volunteers are presented using angular undersampling factors up to eight with acceptable projection reconstruction artifacts.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=pmid________::c814be9e9cb817e3fb5a65cb869defd7 https://pubmed.ncbi.nlm.nih.gov/10680679 Zobrazit plný text záznamu Plný text