A 64-channel personal computer based image reconstruction system and applications in single echo acquisition magnetic resonance elastography and ultra-fast magnetic resonance imaging.

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dc.contributor.advisor Wright , Steven M . en_US
dc.contributor.committeeMember Ji , Jim X . en_US
dc.creator Yallapragada , Naresh en_US
dc.date.accessioned 2010 -01 -15T00 :11 :02Z
dc.date.accessioned 2014 -02 -19T19 :32 :28Z
dc.date.available 2010 -01 -15T00 :11 :02Z
dc.date.available 2014 -02 -19T19 :32 :28Z
dc.date.created 2008 -05 en_US
dc.date.issued 2009 -05 -15 en_US
dc.identifier.uri http : / /hdl .handle .net /1969 .1 /ETD -TAMU -2732
dc.description.abstract Emerging technologies in parallel magnetic resonance imaging (MRI ) with massive receiver arrays have paved the way for ultra -fast imaging at increasingly high frame rates . With the increase in the number of receiver channels used to implement parallel imaging techniques , there is a corresponding increase in the amount of data that needs to be processed , slowing down the process of image reconstruction . To develop a complete reconstruction system which is easy to assemble in a single computer for a real -time rendition of images is a relevant challenge demanding dedicated resources for high speed digital data transfer and computation . We have enhanced a 64 channel parallel receiver system designed for single echo acquisition (SEA ) MRI into a real -time imaging system by interfacing it with two commercially available digital signal processor (DSP ) boards which are capable of transferring large amounts of digital data via a dedicated bus from two high performance digitizer boards . The resulting system has been used to demodulate raw image data in real -time data and store them at rates of 200 frames per second (fps ) and subsequently display the processed data at rates of 26 fps . A further interest in realtime reconstruction techniques is to reduce the data handling issues . Novel ways to minimize the digitized data are presented using reduced sampling rate techniques . The proposed techniques reduce the amount of data generated by a factor of 5 without compromising the SNR and with no additional hardware . Finally , the usability of this tool is demonstrated by investigating fast imaging applications . Of particular interest among them are MR elastography applications . An exploratory study of SEA MRE was done to study the temperature dependency of shear stiffness in an agarose gel and the results correlate well with existing literature . With the ability to make MRE images in a single echo , the SEA MRE technique has an advantage over the conventional MRE techniques . en_US
dc.format.medium electronic en_US
dc.format.mimetype application /pdf en_US
dc.language.iso en _US en_US
dc.subject MRI en_US
dc.title A 64 -channel personal computer based image reconstruction system and applications in single echo acquisition magnetic resonance elastography and ultra -fast magnetic resonance imaging . en_US
dc.type Book en
dc.type.genre Electronic Dissertation en_US
dc.type.material text en_US
dc.format.digitalOrigin born digital en_US

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A 64-channel personal computer based image reconstruction system and applications in single echo acquisition magnetic resonance elastography and ultra-fast magnetic resonance imaging.. Available electronically from http : / /hdl .handle .net /1969 .1 /ETD -TAMU -2732 .

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