Reduced aliasing artifacts using shaking projection<i>k</i>-space sampling trajectory

Zhu, Yanchun; Du, Jiang; Yang, Wei; Duan, Chaijie; Wang, Haoyu; Gao, Song; Bao, Shanglian

doi:10.1088/1674-1056/23/3/038702

Cited by 3 publications

(1 citation statement)

References 31 publications

(15 reference statements)

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“…The AP values of the golden-angle radial sampling method display a downward trend with increasing N . However, when η < 1, the AP value is still not ideal because the regridding image reconstruction method generally requires the acquired data to satisfy the Nyquist sampling theorem [ 16 ]. For this simulation experiment, at least 402 echoes must be acquired to meet this requirement.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

Dynamic magnetic resonance imaging method based on golden-ratio cartesian sampling and compressed sensing

Zhu

Xie

et al. 2018

PLoS ONE

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Dynamic magnetic resonance imaging (DMRI) is used to noninvasively trace the movements of organs and the process of drug delivery. The results can provide quantitative or semiquantitative pathology-related parameters, thus giving DMRI great potential for clinical applications. However, conventional DMRI techniques suffer from low temporal resolution and long scan time owing to the limitations of the k-space sampling scheme and image reconstruction algorithm. In this paper, we propose a novel DMRI sampling scheme based on a golden-ratio Cartesian trajectory in combination with a compressed sensing reconstruction algorithm. The results of two simulation experiments, designed according to the two major DMRI techniques, showed that the proposed method can improve the temporal resolution and shorten the scan time and provide high-quality reconstructed images.

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Section: Simulation Results and Discussionmentioning

confidence: 99%

Dynamic magnetic resonance imaging method based on golden-ratio cartesian sampling and compressed sensing

Zhu

Xie

et al. 2018

PLoS ONE

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Inversion Recovery Gradient Echo Pulse Sequence Program on a 0.7 Tesla Open Superconducting Magnetic Resonance Imaging Platform

Zhu

Yang

et al. 2016

J. Mech. Med. Biol.

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The newly developed open superconducting magnetic resonance imaging (MRI) system, which combines the advantages of the high magnetic fields of superconducting MRI systems and open characteristics of permanent MRI systems, has great potential in clinical and research applications. However, few pulse sequences are applicable to this system. In addition, further testing on this system is needed. Therefore, in this paper, an inversion recovery gradient echo (IR-GE) pulse sequence was developed based on the features of the 0.7 Tesla open superconducting MRI system. An MR Solutions spectrometer was used to control the IR-GE pulse sequence. The developed IR-GE pulse sequence was applied to a pure water phantom using different inversion recovery times (TI). The results of the theoretical analysis and experiments indicate that the developed IR-GE pulse sequence could be effectively applied to the 0.7 Tesla open superconducting MRI system.

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Research progress of <sup>10</sup>B concentration and distribution measurement in boron neutron capture therapy

Gao¹,

Cao²,

Xin-Rui³

et al. 2021

Acta Phys. Sin.

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Boron neutron capture therapy (BNCT) is a dual tumor radiotherapy method combining boron-10 containing drugs and heavy ion therapy, which can kill cancer cells with almost no damage to normal cells, and achieve precise cell-scale treatment. However, the BNCT does not really enter into clinical application stage though it has been developed for nearly 70 years. The methods of measuring the concentration distribution of boron-10 containing drugs in vivo cannot meet the clinical needs, which is one of the core problems affecting the effect and safety of clinical application of BNCT. This article reviews the current methods of measuring the concentration distribution of boron-10 drugs, including the invasive estimation methods that have been used in clinical practice, the researching single photon emission tomography (SPECT) method, positron emission tomography (PET) method, nuclear magnetic resonance (NMR) method, etc., and analyzes the advantages and limitations of current methods. Based on the characteristics of the low gyromagnetic ratio of the boron-10 element and the extremely short magnetic resonance transverse relaxation time, the research ideas of ultra-short echo time magnetic resonance boron-10 quantitative imaging are proposed. The feasibility of quantitative measurement of boron-10 distribution in vivo based on ultrashort echo time magnetic resonance imaging is analyzed theoretically.

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Reduced aliasing artifacts using shaking projectionk-space sampling trajectory

Abstract: Reduced aliasing artifacts using shaking projectionk-space sampling trajectory * Zhu Yan-Chun(朱艳春) a) , Du Jiang(杜江) b) , Yang Wen-Chao(杨文超) a)c) , Duan Chai-Jie(段侪杰) d) , Wang Hao-Yu(王浩宇) a) , Gao Song(高嵩) a)e) † , and Bao Shang-Lian(包尚联) a) ‡ a)

Cited by 3 publications

References 31 publications

Dynamic magnetic resonance imaging method based on golden-ratio cartesian sampling and compressed sensing

Dynamic magnetic resonance imaging method based on golden-ratio cartesian sampling and compressed sensing

Inversion Recovery Gradient Echo Pulse Sequence Program on a 0.7 Tesla Open Superconducting Magnetic Resonance Imaging Platform

Research progress of <sup>10</sup>B concentration and distribution measurement in boron neutron capture therapy

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