SSFP fMRI at 3 tesla: Efficiency of polar acquisition-reconstruction technique.


:SSFP-based fMRI techniques, known for their high specificity and low geometrical distortion, look promising for high-resolution brain mapping. Nevertheless, they suffer from lack of speed and sensitivity, leading them to be exploited mostly in high-field scanners. Radial acquisition can help with these inefficiencies through better tSNR and more effective coverage of the spatial frequencies. Here, we present a SSFP-fMRI approach and experimentally investigate it at 3 T scanners using radial readout for acquisition. In particular, the visual activity is mapped through three bSSFP techniques: 1- Cartesian, 2- Radial with re-gridding reconstruction, 3- Radial with Polar Fourier Transform (PFT) reconstruction. In the PFT technique streaking artifacts, generated at high acceleration rates by re-gridding reconstruction, are avoided and pixel size in the final framework is retrospectively selectable. General agreement, but better tSNR of Radial reading, was first confirmed for these techniques in detection of neural activities at 2 × 2 mm2 in-plane resolution for all 28 subjects,. Next the outcome of the PFT algorithm with 1 × 1 mm2 pixel size was compared to images reconstructed by re-gridding (from the same raw data) with the identical pixel size through interpolation. The localization of the activity showed improvement in PFT over interpolation both qualitatively (i.e., well-fitting in gray-matter) and quantitatively (i.e., higher z-scores and tSNR). The proposed technique can therefore be considered as a remedy for lack of speed and sensitivity in SSFP-based fMRI, in conventional field strengths. The proposed approach is particularly useful in task-based studies when we concentrate on a ROI considerably smaller than FOV, without sacrificing spatial resolution.


Magn Reson Imaging


Malekian V,Rastegar F,Shafieizargar B,Nasiraei-Moghaddam A




Has Abstract


2020-12-01 00:00:00












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    pub_type: 杂志文章


    authors: Filippi M,Rocca MA,Mastronardo G,Comi G

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    authors: Bronen RA,Fulbright RK,Spencer DD,Spencer SS,Kim JH,Lange RC

    更新日期:1995-01-01 00:00:00

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    更新日期:2010-12-01 00:00:00

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    authors: Krug R,Carballido-Gamio J,Burghardt AJ,Haase S,Sedat JW,Moss WC,Majumdar S

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    authors: Duc CO,Trabesinger AH,Weber OM,Meier D,Walder M,Wieser HG,Boesiger P

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    authors: Li Y,Osorio JA,Ozturk-Isik E,Chen AP,Xu D,Crane JC,Cha S,Chang S,Berger MS,Vigneron DB,Nelson SJ

    更新日期:2006-12-01 00:00:00

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    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Moser KW,Raguin LG,Harris A,Morris HD,Georgiadis J,Shannon M,Philpott M

    更新日期:2000-02-01 00:00:00

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    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Bittoun J,Taquin J,Sauzade M

    更新日期:1984-01-01 00:00:00

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    pub_type: 杂志文章


    authors: Peters AM,Brookes MJ,Hoogenraad FG,Gowland PA,Francis ST,Morris PG,Bowtell R

    更新日期:2007-07-01 00:00:00

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    更新日期:2007-05-01 00:00:00

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    更新日期:2018-06-01 00:00:00

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    authors: Pfeuffer J,Shmuel A,Keliris GA,Steudel T,Merkle H,Logothetis NK

    更新日期:2007-07-01 00:00:00

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    pub_type: 杂志文章


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    更新日期:1996-01-01 00:00:00

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    authors: Li X,Youngren JF,Hyun B,Sakkas GK,Mulligan K,Majumdar S,Masharani UB,Schambelan M,Goldfine ID

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    journal_title:Magnetic resonance imaging

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    authors: Wang Z,Wang J,Calhoun V,Rao H,Detre JA,Childress AR

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    authors: Bergen RV,Ryner L

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    journal_title:Magnetic resonance imaging

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    authors: Shetty AN,Bis KG

    更新日期:1999-07-01 00:00:00

  • Single-sided mobile NMR with a Halbach magnet.

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    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Gustard S,Fadili J,Williams EJ,Hall LD,Carpenter TA,Brett M,Bullmore ET

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    journal_title:Magnetic resonance imaging

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    authors: Zong F,d'Eurydice MN,Galvosas P

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    authors: Badar F,Lee J,Qu X,Xia Y

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    authors: Pope JM,Walker RR,Kron T

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  • Semi-adiabatic Shinnar-Le Roux pulses and their application to diffusion tensor imaging of humans at 7T.

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    pub_type: 杂志文章


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    journal_title:Magnetic resonance imaging

    pub_type: 杂志文章


    authors: Du J,Bydder M,Takahashi AM,Carl M,Chung CB,Bydder GM

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