SQUID-Based Magnetic Resonance Imaging at Ultra-Low Field Using the Backprojection Method

Joint Authors

Yu, Peng
Guo, Qingqian
Ma, Changyu
Xu, Yajie
Fan, Meisheng
Chang, Yan
Yang, Xiaodong
Zhang, Xin
Hu, Tao

Source

Concepts in Magnetic Resonance :Part B : Magnetic Resonance Engineering.

Issue

Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-11, 11 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2020-10-22

Country of Publication

Egypt

No. of Pages

11

Main Subjects

Physics
Medicine

Abstract EN

Ultra-low field magnetic resonance imaging (ULF MRI) is an effective imaging technique that applies the ultrasensitive detector of superconducting quantum interference device (SQUID) sensor to detect the MR signal at a microtesla field range.

In this work, we designed and developed a SQUID-based ULF MRI system with a frequency-adjustable measurement field, the performance of which was characterized via water phantoms.

In order to enhance the MR signals, a 500 mT Halbach magnet was used to prepolarize the magnetization of the sample prior to excitation.

The signal-to-noise-ratio (SNR) of the spin-echo- (SE-) based pulse sequence can reach up to 70 in a single scan.

The images were then reconstructed successfully by using the maximum likelihood expectation maximization (MLEM) algorithm based on the backprojection imaging method.

It was demonstrated that an in-plane resolution of 1.8 × 1.8 mm2 can be achieved which indicated the feasibility of SQUID-based MRI at the ULF.

American Psychological Association (APA)

Guo, Qingqian& Ma, Changyu& Zhang, Xin& Xu, Yajie& Fan, Meisheng& Yu, Peng…[et al.]. 2020. SQUID-Based Magnetic Resonance Imaging at Ultra-Low Field Using the Backprojection Method. Concepts in Magnetic Resonance :Part B : Magnetic Resonance Engineering.،Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1139699

Modern Language Association (MLA)

Guo, Qingqian…[et al.]. SQUID-Based Magnetic Resonance Imaging at Ultra-Low Field Using the Backprojection Method. Concepts in Magnetic Resonance :Part B : Magnetic Resonance Engineering. No. 2020 (2020), pp.1-11.
https://search.emarefa.net/detail/BIM-1139699

American Medical Association (AMA)

Guo, Qingqian& Ma, Changyu& Zhang, Xin& Xu, Yajie& Fan, Meisheng& Yu, Peng…[et al.]. SQUID-Based Magnetic Resonance Imaging at Ultra-Low Field Using the Backprojection Method. Concepts in Magnetic Resonance :Part B : Magnetic Resonance Engineering.. 2020. Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1139699

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-1139699