ADC-T2 two-dimensional atlas measuring method, ADC-T2 two-dimensional atlas measuring device, computer equipment and non-uniform field magnetic resonance system

Abstract

The invention relates to the technical field of nuclear magnetic resonance imaging, and discloses an ADC-T2 two-dimensional atlas measurement method and device, computer equipment and a non-uniform field magnetic resonance system, which can be applied to a nuclear magnetic resonance system with an extremely non-uniform magnetic field or a nuclear magnetic resonance system which cannot realize extremely short echo time. According to the method, the ADC coefficient and the T2 value are fitted from the multiple groups of echo signals through the acquired echo signals acquired by adopting the CPMGsequences with different echo intervals, so that the ADC-T2 atlas can be measured, a complex diffusion weighted sequence is not needed any more, and the method has the advantages of simple algorithmand low system requirements and is suitable for large-scale popularization and application. And the cost of hardware systems such as spectrometer equipment, a radio frequency power amplifier and a radio frequency coil can be reduced. Meanwhile, the measuring method has the characteristic of stable algorithm, is not easily influenced by flowing liquid, and is also suitable for substances with smaller T1 / T2.

Description

technical field [0001] The invention belongs to the technical field of nuclear magnetic resonance imaging, and in particular relates to magnetic resonance spectrometer technology, in particular to a measurement method, device, computer equipment and non-uniform field magnetic resonance system for the decay time constant of a transverse magnetization vector. Background technique [0002] Nuclear magnetic resonance technology is a technique that uses the nuclear magnetic resonance phenomenon of hydrogen protons to image or detect the composition and structure of substances. Nuclei containing a single number of protons in the human body, such as the hydrogen nucleus, have a spin motion for the protons. The spin motion of charged atomic nuclei is physically similar to individual small magnets, and the directionality distribution of these small magnets is random in the absence of external conditions. When the human body is placed in an external magnetic field, these small magnet...

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Problems solved by technology

[0007] In order to solve the NMR system with an extremely inhomogeneous magnetic field, it is necessary to use an ultra-fast signal readout module to accurately measure the two-dimensional map distribution of ADC and T2, resulting in very high hardware requirements for spectrometer equipment, RF power amplifiers, and RF coils. The object of the present invention is to provide a method, device, computer equipment, non-uniform field magnetic resonance system and computer-readable storage medium for measuring the decay time constant of the transverse magnetization vector

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