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Proscan Imaging Installs the Industry's Widest Bore MR System from Hitachi CLEVELAND--(BUSINESS WIRE)-- Hitachi Medical Systems America Inc. (HMSA) today announced the first Echelon Oval High ...
Portable magnetic resonance imaging (MRI) is referred to the imaging provided by an MRI scanner that has mobility and portability. [1] [2] [3] It provides MR imaging to the patient in-time and on-site, for example, in intensive care unit (ICU) where there is danger associated with moving the patient, in an ambulance, after a disaster rescue, or in a field hospital/medical tent.
The cost of an MRI machine limits more widespread use and is significant, at about $1,000,000 USD per Tesla. [28] Often a 1.5T machine with a wide bore will be used, but a 3T machine should provide the highest resolution.
Typical gradient systems are capable of producing gradients from 20 to 100 mT/m (i.e., in a 1.5 T magnet, when a maximal z-axis gradient is applied, the field strength may be 1.45 T at one end of a 1 m long bore and 1.55 T at the other [50]). It is the magnetic gradients that determine the plane of imaging—because the orthogonal gradients can ...
The field strength of the magnet is measured in teslas – and while the majority of systems operate at 1.5 T, commercial systems are available between 0.2 and 7 T. 3T MRI systems, also called 3 Tesla MRIs, have stronger magnets than 1.5 systems and are considered better for images of organs and soft tissue. [7]
In hyperpolarized gas MRI, the gases used are noble gases, such as 3 He or 129 Xe, which have large nuclear magnetic moments but low natural abundance and therefore produce very weak signals. To increase the nuclear spin polarization of either 3 He or 129 Xe, two processes are involved: 1) optical pumping and 2) spin exchange. [23] [24]
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