Articles

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  SE Hard Pulse Echo Sequence

  September 23, 2021 Blog

  SE Hard Pulse Echo Sequence Introduction If we put another 180-degree pulse after 90-degree pulse, it will become the spin echo sequence which is also called hard pulse echo sequence. Pulse sequence parameter SE sequence is shown in figure 1. Fig 1 SE sequence RFD: The sampling time of the first sampling point is controlled by the delay time of the 90° puls ...

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  IR sequence

  September 15, 2021 Blog

  Introduction The process of the sample from the excited state to the equilibrium state is called the longitudinal relaxation of the sample, also called spin-lattice relaxation, and the relaxation speed is characterized by the longitudinal relaxation time T1. This chapter describes how to use the Inversion Recovery (IR) sequence to measure the longitudinal relaxation time ...

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  Broccoli MRI and 3D imaging

  June 23, 2021 Articles / Blog / Food & Agriculture

  Broccoli MRI and 3D imaging 1. Objective Broccoli MRI and 3D imaging； 2. Materials Broccoli； 3.Experimental Instrument Instrument: NM21-060H-I MRI system,0.55T magnet; 60 mm diameter probe; 4.Sample Preparation After cutting the broccoli to the proper size, put it into the probe to test the cross section and coronal plane images. 5.Results ...

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  Mushroom drying process studied by Time domain NMR

  June 15, 2021 Blog / Food & Agriculture

  Mushroom drying process studied by Time domain NMR Sample :Shii-take Constant temperature dry: The shii-take is dried at 55℃constant temperature until 3% for water content，observe T2 relaxation and coronal plane imaging every hour. constant temperature dry Water migration Signal Ai of T2 represent the amount of water，the signals at different drying time are as ...

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  T1 Relaxation time and T1 weighted imaging of MRI contrast agent

  June 7, 2021 Articles / Blog / Life Science

  T1 Relaxation time and T1 weighted imaging of MRI contrast agent T1 relaxation time measurement：NMI20 Nuclear Magnetic Resonance, niumag corporation, resonant frequency: 21.170MHz T1 weighted image：NMI20 Nuclear Magnetic Resonance, niumag corporation, resonant frequency: 21.170MHz MRI contrast agent Sample preparation Preparate two contrast agents #1 as 25mg/ml ...

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  Low field NMR hard pulse sequence(Spin Echo)

  May 26, 2021 Blog

  Low field NMR hard pulse sequence(Spin Echo) The low field NMR hard pulse sequence (Spin Echo) is excited by hard pulse radio frequency. Pulse sequence diagram Low field NMR hard pulse sequence(Spin Echo) parameters: RF: triggering timing sequence of RF pulses; Rx: receiving timing sequence of nuclear magnetic signal; P90: 90 degree pulse width; P180: 180 d ...

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