Advanced Acquisition and Reconstruction Techniques for Accelerated 3D Magnetic Resonance Angiography

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" Advanced Acquisition and Reconstruction Techniques for Accelerated 3D Magnetic Resonance Angiography "

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	150034
Doc. No	:	ET21826
Main Entry	:	Arjun Arunachalam
Title Proper	:	Advanced Acquisition and Reconstruction Techniques for Accelerated 3D Magnetic Resonance Angiography
Note	:	This document is digital این مدرک بصورت الکترونیکی می باشد
Abstract	:	Sampling the MR Fourier space, known as k-space, is typically performed along a Cartesian raster patterndue to the methods robust behavior in regard to off-resonance spins and certain system errors andinstabilities. Rapid scanning by undersampling k-space is not possible in Cartesian sampling due to thepresence of coherent aliasing or ghosting patterns. However, radial data acquisition sampling pattern canbe accelerated with tolerable incoherent aliasing artifacts while providing high spatial resolution rapidly,especially in high contrast environments. Temporal filtering of this variable density radial sampling strategycan also easily produce time-resolved images indicating dynamic processes such as blood flow patterns ortumor enhancement. An automatic background suppression method to suppress non-vascular static andtissue parenchyma without operator intervention is presented using the temporal information in the time-resolved image volumes. The method significantly simplifies and speeds image visualization usingmaximum intensity projection (MIP) rendering and increases image contrast between the desiredvasculature and background. In time-resolved CE-MRA applications which image the entire torso, the,..tested for theQ1 PC1 bus cardBoth these projects mere sofixare des elopment efforts tonards contributing to dlfferentaspects of Roboucs and lZ1echatronics projects m the Controls and Roboucs Group..
Subject	:	Electericl tess
	:	برق
electronic file name	:	TL45012.pdf
Title and statement of responsibility and	:	Advanced Acquisition and Reconstruction Techniques for Accelerated 3D Magnetic Resonance Angiography [Thesis]