(25mm) 1.5T Small Animal Magnetic Resonance Imaging System

The (25mm) 1.5T small animal nuclear magnetic resonance imaging instrument (permanent magnet) adopts a high uniformity magnetic field system, and the magnetic field control uses deuterium external locking field to ensure the stability of the magnetic field for long-term acquisition of four-dimensional data (stability 10Hz/Month), while reducing environmental requirements (high-precision work can be carried out at an environmental temperature of 10-35 degrees). The processing computer uses workstations to achieve large-scale data processing capabilities. Multiple pulse sequences are provided, and users can freely edit the pulse sequences.

(25mm) 1.5T Small Animal Magnetic Resonance Imaging SystemMagnetic resonance spectroscopy imaging (MRSI) is one of the important detection tools for biomedical research that has entered a new level. MRSI is developed based on magnetic resonance imaging (MRI), which enhances the physical and chemical environment as well as molecular structure of spin nuclei in the sample compared to MRI

(25mm) 1.5T Small Animal Magnetic Resonance Imaging SystemThe permanent magnet adopts a high uniformity magnetic field system, and the magnetic field control adopts deuterium external locking field to ensure the stability of the magnetic field for long-term acquisition of four-dimensional data (stability 10Hz/Month), while reducing the requirements for the environment (high-precision work can be carried out at an ambient temperature of 10-35 degrees). The processing computer uses workstations to achieve large-scale data processing capabilities. Multiple pulse sequences are provided, and users can freely edit the pulse sequences. Using high linear gradient coils (98% linearity), the image distortion is less than 1%. Suitable for scientific research on plants, small animals, and food.

Basic functions:

1. Four dimensional magnetic resonance imaging: three-dimensional spatial imaging and one-dimensional spectral shift imaging;

2. Two dimensional magnetic resonance imaging: spatial frequency encoding and phase encoding of SE sequences, including T1 weighted and T2 weighted maps;

3. T1, T2 relaxation time measurement;

4. EPI pulse sequence rapid imaging; GE pulse sequence two-dimensional imaging;

5. IR pulse imaging sequence: pseudo color real imaginary two-dimensional imaging;

6. Dixon sequence oil-water separation; (Dixon chemical shift imaging: pure water image, pure fat image)

7. 4D Fourier Transform SE Sequence;

8. Echo time encoded spectral imaging (ETE);

9. Echo plane imaging;

10. Mouse four-dimensional and three-dimensional magnetic resonance imaging function; (Three dimensional magnetic resonance imaging of small animals and plants)

11. Provide software for relaxation time acquisition and testing, as well as software for three-dimensional data inversion and reconstruction;

12. It is possible to save experimental data images from multiple angles and observe sample images.

Technical performance indicators of nuclear magnetic resonance spectroscopy:

1. Four dimensional imaging function: 64 * 64 * 64 * 64 * 64

2. Magnetic field strength: 1.3T-1.5T

3. H resonance frequency: 55-59MHz

4. Sample size: Diameter 25mm (3D imaging), 20mm (4D imaging)

5. Magnetic field uniformity:<2ppm, 25mm full space

6. Temperature control stability: 0.06K/h, two hours after startup

7. Signal to noise ratio: 55dB

8. Image distortion degree:<1%

9. Graphics resolution: Normal mode 128 * 128 * 128 (3D), 256 * 256 (2D), high-resolution mode 512 * 512 (2D)

10. Gradient magnetic field strength: 10GS/mm

11. Resolution better than 0.08mm

12. Image linearity: The X, Y, and Z directions are all better than 98% (20mm × 20mm × 20mm)

13. Maximum gradient magnetic field: 70mT/m in X, Y, Z directions

14. Temperature control stability: 0.06K/h, two hours after startup

15. Magnetic field stability: Magnetic field stability with a Larmor frequency drift of 100Hz/h per hour

16. Spatial resolution: Normal mode 0.15mm, High mode 0.08mm

content

(1) Can conduct experiments on the principles of magnetic resonance imaging, imaging technology, hardware structure, and application expansion.

(2) Basic experiments of magnetic resonance imaging, improvement and artifact experiments of magnetic resonance imaging, research on various sequences of magnetic resonance imaging and related applications.

(3) Measurement of water content and oil content using nuclear magnetic resonance, measurement of adsorbed water content, imaging function, observation of changes in water content and water tissue morphology during seed water absorption and germination process. (Conversion process between free water and adsorbed water)

(4) , grain and oil measurement (corn, sesame, soybean, peanut) and other samples of water content, oil content measurement experiment, imaging research and other related experiments.

(5) The measurement of relaxation time of experimental samples, multi angle observation and arbitrary angle storage of experimental sample images, magnetic susceptibility imaging and other related experiments, three-dimensional imaging data acquisition and image inversion, three-dimensional stereo reconstruction (pseudo color image reconstruction) can be widely used in scientific research such as food science, life science, medical imaging, biomedicine, and preclinical experiments of medicine.