Reconstruction of ۳D Stack of Stars in Cardiac MRI using a Combination of GRASP and TV

سال انتشار: 1401
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 220

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شناسه ملی سند علمی:

JR_JADM-10-1_004

تاریخ نمایه سازی: 21 فروردین 1401

چکیده مقاله:

One of the most advanced non-invasive medical imaging methods is MRI that can make a good contrast between soft tissues. The main problem with this method is the time limitation in data acquisition, particularly in dynamic imaging. Radial sampling is an alternative for faster data acquisition and has several advantages compared to Cartesian sampling. Among them, robustness to motion artifacts makes this acquisition useful in cardiac imaging. Recently, CS has been used to accelerate data acquisition in dynamic MRI. Cartesian acquisition uses irregular undersampling patterns to create incoherent artifacts to meet the Incoherent sampling requirement of CS. Radial acquisition, due to its incoherent artifact, even in regular sampling, has an inherent fitness to CS reconstruction. In this study, we reconstruct the (۳D) stack of stars data in cardiac imaging using the combination of the TV penalty function and the GRASP algorithm. We reduced the number of spokes from ۲۱ to ۱۳ and then reduced to ۸ to observe the performance of the algorithm at a high acceleration factor. We compared the output images of the proposed algorithm with both GRASP and NUFFT algorithms. In all three modes (۲۱, ۱۳, and ۸ spokes), average image similarity was increased by at least by ۰.۴, ۰.۱ compared to NUFFT, GRASP respectively. Moreover, streaking artifacts were significantly reduced. According to the results, the proposed method can be used on a clinical study for fast dynamic MRI, such as cardiac imaging with the high image quality from low- rate sampling.

کلیدواژه ها:

Cardiac MRI ، Golden Ratio Radial Acquisition ، Compressive sensing

نویسندگان

M. Tavakkoli

Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Mazandaran, Iran.

A. Ebrahimzadeh

Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Mazandaran, Iran.

A. Nasiraei Moghaddam

Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.

J. Kazemitabar

Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Mazandaran, Iran.

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