At present, the top models of 1, Philips, GE and Siemens are: Multiva 1.5t, Optima 360 Advanced and Aera XQ.
2. The overall design of Philips' Multiva from hardware to software embodies the design concept and thought that Philips can have its cake and eat it:
(1) The acceleration effect from the platform to the coil and then to the coil combination (professionally called acceleration factor) is 16, and the image signal-to-noise ratio and scanning speed are improved synchronously, which ge and Siemens do not have;
(2) The design process of the coil ensures that the workflow of Multiva is optimized, and the "0" coil can be basically replaced, and the coil is also in contact with the patient's body surface at a distance of "0", which improves the signal-to-noise ratio of the image while optimizing the workflow;
(3)Multiva has the latest magnetic * * * vibration technology magic mirror, which can shorten the scanning time by half and achieve the best joint fat pressing effect. In a word, the overall design of Multiva is in line with what China people want, that is, it is fast and good.
Extended data:
1 and magnetic * * * vibration are discovered on the basis of the development of solid particle theory and radio microwave electronics technology. 1945 paramagnetic * * vibration was first observed in the aqueous solution of paramagnetic Mn salt, and the NMR * * * vibration of paraffin and proton in water was discovered by absorption and induction respectively in the second year. The ferromagnetic vibration of iron, cobalt and nickel films was found by waveguide resonator method.
2. In 1950, the antiferromagnetic vibration of solid Cr2O3 near room temperature was observed. 1953 cyclotron vibration of electrons and holes was observed in semiconductor silicon and germanium. Ferromagnetic oscillation was predicted theoretically and observed experimentally in 1953 and 1955 respectively. Subsequently, magnetostatic * * vibration (1957) and spin wave * * * vibration (1958) of higher-order modes in magnetically ordered systems are found. 1956 studied the coupling phenomenon of magnetic double * * * vibration and two kinds of magnetic * * vibration. After these magnetic vibrations were discovered, they were widely used in basic disciplines such as physics, chemistry and biology, as well as new technologies such as microwave technology and quantum electronics.
3. Such as paramagnetic solid-state quantum amplifier, various ferrite microwave devices, nuclear magnetic resonance spectrum analysis technology and nuclear magnetic resonance imaging technology, as well as the study of crystal field and energy level structure of paramagnetic crystal, energy band structure of semiconductor and biomolecule structure by magnetic resonance method. The determination of spin and magnetic moment parameters of nucleus and elementary particles is also developed according to various magnetic vibration principles.
4. Magnetic resonance imaging technology is widely used in clinical medicine and medical research because of its advantages of no radiation and high resolution. Some advanced equipment manufacturers, together with researchers, constantly optimize the performance of magnetic vibration scanners and develop new components. For example, the 1.5T superconducting magnetic vibration scanner made by Siemens AG in Germany has nerve imaging module, blood vessel imaging module, heart imaging module, body imaging module, tumor program module, bone and joint imaging module and children imaging module. It has the advantages of high resolution, uniform magnetic field, fast scanning speed, relatively low noise and multi-directional imaging.
References:
Baidu Encyclopedia: Magnetic Vibration