Magnetic **** vibration imaging is a new medical imaging technology based on the principle of magnetic **** vibration imaging, which has good diagnostic function for solid organs such as brain, thyroid, liver, gallbladder, spleen, kidney, pancreas, adrenal glands, uterus, ovary, prostate, as well as the heart and large blood vessels. It does not affect human health, but it requires more than 1,000 people to have an MRI**** vibration scan, which most patients cannot afford. So why is MRI*** vibration imaging so expensive?
Strong magnetic fields, especially highly stable and homogeneous ones, are hard to come by.1)First, it requires cryogenics, with liquid helium at -269; the usual way to keep a lot of liquid helium in the instrument is to add a liquid nitrogen (-196) jacket to the exterior.2)The machining accuracy of the parts is needed to ensure that the strength of the magnetic field in the area where the sample is located is constant,because it is correlated with the resolution. 3) The electronics system is highly stable and needs to suppress voltage fluctuations that could destroy sensitivity and even accuracy.
Whether it's NMR*** vibrational spectroscopy in the chemical field or NMR*** vibrational imaging in the medical field, the basic principle is the same: the nuclear energy level splits in the presence of a magnetic field, and the energy level jumps in the presence of an RF pulse, thus generating a signal. In addition, the signal detector needs to be able to detect the macroscopic magnetic moments generated by the nucleus, which are so weak that even the thermal noise of the coil affects its sensitivity, so there are things like cryogenic probes cooled by liquid nitrogen.
For these reasons, the manufacture of nuclear magnetic **** vibration instruments is a complex technology. The NM***vibration spectrometers are generally Bruker and Varian, and the NM***vibration imaging instruments are mainly Siemens, General Electric, Hitachi, and others. This has led to 1) very expensive NMR*** vibration instruments. The price of an MRI machine is $500,000-$1,000,000, which is a guide to the cost and price of an MRI machine. Therefore, depreciation is expensive and allocating it to the cost of testing is also expensive.2) NMR***Vibe is expensive to maintain. Nuclear magnetic *** vibrators require liquid nitrogen and liquid helium to maintain the strong magnetic field generated by the superconducting magnets, and even when stopped, liquid nitrogen and liquid helium are consumed. Although liquid nitrogen is inexpensive (usually less than $10 per liter), the consumption rate is 0.4 liters per hour, so consumption is high. Liquid helium is expensive, typically $200 per liter. Liquid helium is added every 3-4 months, costing more than $10,000 each time.