gradient magnetic field

gradient magnetic field

An MRI term for a small linear magnetic field superimposed on the large static magnetic field during an MRI scan, the strength (amplitude) and direction of which change during the scan such that each small volume element (voxel) within the imaging volume resonates at a different frequency, allowing spatial encoding to be performed.
References in periodicals archive ?
Gas- Liquid Interface Deformation of Flowing Water in Gradient Magnetic Field -Influence of Flow Velocity and NaCl Concentration, Jpn.
In this work, to further fully understand the dynamic behavior of MNPs under the special gradient magnetic field, a similar electromagnetic apparatus is designed and fabricated.
The behavior of dissolved oxygen in gas oil using high gradient magnetic field, Magnetic and Electrical Separation 9(4): 199-211.
However, in many other important applications, we need an open structure/lens to achieve a high gradient magnetic field in a region (without magnetic materials) far away from the lens.
For the implementation of a high-quality finishing surface treatment of special optical workpieces magnetorheological polishing method is used [3, 4], which is based on software-controlled tangential material removal by a magnetorheological polishing fluid (MRPF) jet, formed by the gradient magnetic field, with its local contact with the object of the treatment.
By solving a magnetostatic boundary value problem in the domain using the boundary condition of uniform magnetic field ([H.sub.0]) in the region that is far from the wire and magnetostatic boundary condition at the surface of the wire, the high gradient magnetic field (H) around the wire can be expressed in polar coordinates ([r.sub.a], [theta]) as [7]
The drug is then absorbed by the tumor through a high gradient magnetic field, which is concentrated near the tumor center [26].
The DVMF features a high intensity, high gradient magnetic field generated in the bore of a solenoid coil encased in steel housing.
Company's redesigned DVMF features a high intensity, high gradient magnetic field generated in the bore of a solenoid coil encased in steel housing.
showed that manipulation of [Fe.sub.3][O.sub.4] MNPs that targeted against a mechanosensitive ion channel TREK-1 by a gradient magnetic field (80 mT, 5.5 T/m) could lead to the change of TREK-1 activity and the whole-cell currents [45].
At gradient magnetic field exposure levels 50% to 100% above perception threshold, patients may experience pain.