Design and construction of a 3D ultra-low field MRI instrument using a dynamic small permanent magnet array and coil-based inductive magnetometer

2021 ◽  
Author(s):  
◽  
Jiasheng Su
Keyword(s):  
Permanent Magnet ◽  
Low Field ◽  
Low Field Mri ◽  
Design And Construction

Low-field MRI measurements using a tuned HTS SQUID as detector and permanent magnet pre-polarization field

2012 ◽  
Vol 25 (7) ◽  
pp. 075013 ◽  
Author(s):  
Chao Liu ◽  
Yi Zhang ◽  
Longqing Qiu ◽  
Hui Dong ◽  
Hans-Joachim Krause ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Polarization Field ◽  
Low Field ◽  
Low Field Mri ◽  
Mri Measurements

scholarly journals Permanent Magnet Pre-Polarization in Low Field MRI Measurements Using SQUID

2012 ◽  
Vol 36 ◽  
pp. 274-279 ◽  
Author(s):  
Chao Liu ◽  
Yi Zhang ◽  
Longqing Qiu ◽  
Hui Dong ◽  
Hans-Joachim Krause ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Low Field ◽  
Low Field Mri ◽  
Mri Measurements

Low-field MRI detected by tuned HTS SQUID utilizing permanent magnet as pre-polarization field

2012 ◽  
Vol 57 (SI-1 Track-M) ◽  
Author(s):  
Chao Liu ◽  
Yi Zhang ◽  
Hui Dong ◽  
Longqing Qiu ◽  
Hans-Joachim Krause ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Polarization Field ◽  
Low Field ◽  
Low Field Mri

Tuned HTS SQUID-Detected Low Field MRI Using a Permanent Magnet for Pre-polarization With Automatic Transportation

2013 ◽  
Vol 23 (3) ◽  
pp. 1601104-1601104 ◽  
Author(s):  
Chao Liu ◽  
Yi Zhang ◽  
Hui Dong ◽  
Longqing Qiu ◽  
H. Krause ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Low Field ◽  
Low Field Mri

Improved Contrast in Ultra-Low-Field MRI with Time-Dependent Bipolar Prepolarizing Fields: Theory and NMR Demonstrations

2013 ◽  
Vol 20 (3) ◽  
pp. 327-336 ◽  
Author(s):  
Jaakko O. Nieminen ◽  
Jens Voigt ◽  
Stefan Hartwig ◽  
Hans Jürgen Scheer ◽  
Martin Burghoff ◽  
...  
Keyword(s):  
Field Strength ◽  
Time Course ◽  
Signal Strength ◽  
Relaxation Rates ◽  
Resonance Imaging ◽  
New Approach ◽  
Spin Lattice ◽  
Low Field ◽  
Low Field Mri ◽  
Magnetic Resonance Imaging Mri

Abstract The spin-lattice (T1) relaxation rates of materials depend on the strength of the external magnetic field in which the relaxation occurs. This T1 dispersion has been suggested to offer a means to discriminate between healthy and cancerous tissue by performing magnetic resonance imaging (MRI) at low magnetic fields. In prepolarized ultra-low-field (ULF) MRI, spin precession is detected in fields of the order of 10-100 μT. To increase the signal strength, the sample is first magnetized with a relatively strong polarizing field. Typically, the polarizing field is kept constant during the polarization period. However, in ULF MRI, the polarizing-field strength can be easily varied to produce a desired time course. This paper describes how a novel variation of the polarizing-field strength and duration can optimize the contrast between two types of tissue having different T1 relaxation dispersions. In addition, NMR experiments showing that the principle works in practice are presented. The described procedure may become a key component for a promising new approach of MRI at ultra-low fields

Improving Image Quality In Low-Field MRI With Deep Learning

2021 ◽  
Author(s):  
Armando Garcia Hernandez ◽  
Pierre Fau ◽  
Stanislas Rapacchi ◽  
Julien Wojak ◽  
Hugues Mailleux ◽  
...  
Keyword(s):  
Deep Learning ◽  
Image Quality ◽  
Low Field ◽  
Low Field Mri

Breast tumor imaging with ultra low field MRI

1994 ◽  
Vol 12 (3) ◽  
pp. 395-401 ◽  
Author(s):  
Kirsti I. Dean ◽  
Markku Komu
Keyword(s):  
Breast Tumor ◽  
Tumor Imaging ◽  
Low Field ◽  
Low Field Mri

Deep Learning–based Method for Denoising and Image Enhancement in Low-Field MRI

2021 ◽  
Author(s):  
Dang Bich Thuy Le ◽  
Meredith Sadinski ◽  
Aleksandar Nacev ◽  
Ram Narayanan ◽  
Dinesh Kumar
Keyword(s):  
Deep Learning ◽  
Image Enhancement ◽  
Low Field ◽  
Low Field Mri

A quadrature lowpass birdcage coil for a vertical low field MRI scanner

2004 ◽  
Vol 22B (1) ◽  
pp. 1-6 ◽  
Author(s):  
Giulio Giovannetti ◽  
Raffaello Francesconi ◽  
Luigi Landini ◽  
Vittorio Viti ◽  
Maria Filomena Santarelli ◽  
...  
Keyword(s):  
Birdcage Coil ◽  
Low Field ◽  
Low Field Mri
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