Patent
Multi-echo presto
Stefan Fischer,Craig Kenneth Jones,Melanie Suzanne Kotys +2 more
- 21 May 2013
11
TL;DR: In this article, a magnetic resonance imaging system (MRSI) includes a magnet (82), gradient coils (88), and one or more radio frequency coils (92) to generate a series of radio frequency pulses spaced by repetition times.
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Abstract: A magnetic resonance imaging system (78) includes a magnetic resonance imaging device (80), one or more processors (104), and a display (106). The magnetic resonance imaging device (80) includes a magnet (82), gradient coils (88), and one or more radio frequency coils (92). The magnet (82) generates a Bo field. The gradient coils (88) apply gradient fields to the Bo field. The one or more radio frequency coils (92) generate a radio frequency pulse to excite magnetic resonance and measure generated gradient echoes. The one or more processors (104) are configured to activate (116) the one or more radio frequency coils (92) to generate a series of radio frequency pulses spaced by repetition times and to induce magnetic resonance. The one or more processors (104) are configured to control (118) the gradient coils to apply after each RF pulse readout gradient field pulses which refocus the resonance into a plurality of gradient echoes, shift and refocus gradient field pulses which shift and refocus at least one of the echoes to a subsequent repetition time, and receive and demodulate the gradient echoes to form k- space data lines. The one or more processors are configured to reconstruct (124) one or more images from the measured one or more gradient echoes. A display (106) displays the one or more reconstructed images.
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Citations
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TL;DR: In this article, a magnetic resonance imaging system (100) is used to acquire at least one set of k-space blade data from an imaging zone of a subject (118).
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Sueoka Kazuhiro
- 20 Jun 2013
TL;DR: In this paper, a temperature measuring unit (70A to 70D), a data storing unit (100), a pulse setting unit (102), and an imaging unit are described.
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Magnetic resonance imaging apparatus and susceptibility-weighted imaging method using the same
Jin Young Hwang,Joon Soo Kim,Jae Moon Jo,Yang Lim Choi,Jongho Lee +4 more
- 29 Jan 2014
TL;DR: In this article, a compensation gradient field is applied for compensating for field inhomogeneity and in response, a third RF echo signal is acquired in a third echo time longer than the second echo time.
7
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Magnetic resonance imaging method and apparatus
Zhi Guo Sun,Qiong Zhang +1 more
- 10 Jun 2015
TL;DR: Asymmetric echo magnetic resonance signals can be acquired in a dual-echo steady-state sequence, so that scanning time is reduced and the degree of comfort of a subject is improved as mentioned in this paper.
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Silent 3D magnetic resonance fingerprinting
Bornert Peter,Nehrke Kay,Doneva Mariya Ivanova,Amthor Thomas Erik,Koken Peter,Duensing George Randall +5 more
- 06 Mar 2019
TL;DR: In this paper, a magnetic resonance imaging system was proposed for acquiring magnetic resonance data from a subject within an imaging zone. But the system was not suitable for the processing of a set of predetermined substances.
5
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A. functional MRI technique combining principles of echo‐shifting with a train of observations (PRESTO)
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Patent
Magnetic resonance imaging method and apparatus
Klaas P. Pruessmann,Markus Weiger,Markus B. Scheidegger,Peter Boesiger +3 more
- 14 Apr 1999
TL;DR: In this article, a method for obtaining images by means of magnetic resonance (MR) of an object placed in a static magnetic field, which includes simultaneous measurement of a number of sets of MR signals by application gradients and an array of receiver coils, reconstruction of a receiver coil image from the sets MR signals measured and reconstruction of the final image from a distant dependent sensitivity of the receiver coils and the first plurality of receiver coil images, was proposed.
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Fast echo-shifted gradient-recalled MRI : combining a short repetition time with variable T2* weighting
TL;DR: It is shown that the period of T2*‐weighting can be lengthened by n TR‐periods by appropriate gradient schemes without RF refocusing resulting in progressively delayed gradient‐recalled echoes.
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