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Apparatus for active cooling of a mri patient bore in cylindrical mri systems

An imaging system, cylindrical technology, used in magnetic resonance measurement, control/regulation systems, transformer/inductor cooling, etc., to solve problems such as inability to cool patients

Active Publication Date: 2005-06-08
GE MEDICAL SYST GLOBAL TECH CO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main limitation of this approach is that patients often complain of being too cold
Another disadvantage is that the airflow volume can vary greatly depending on the size of the patient, so that in some cases insufficient or irregular airflow cannot cool the patient at all

Method used

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  • Apparatus for active cooling of a mri patient bore in cylindrical mri systems
  • Apparatus for active cooling of a mri patient bore in cylindrical mri systems
  • Apparatus for active cooling of a mri patient bore in cylindrical mri systems

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Embodiment Construction

[0019] Referring now in detail to the drawings, in which like numbered elements correspond to like elements throughout the figures, FIG. . Also shown in FIG. 1 are two layers of epoxy-like material 123, 125 used to separate the conductive layers. 2 shows a portion of an MRI imaging system 200 including a magnet 216, gradient coils 214, patient bore wall 240, and RF magnet coil 230 for the MR imaging system of the present invention. Referring more particularly to the drawings, FIG. 2 shows an MRI assembly 200 for an MR imaging system (not shown) including an MR magnet 216, a cylindrical gradient coil winding 214, and a RF coil 230 . Generally, the continuous cooling tube is wound helically through the gradient coil winding 214 . Gradient coil windings 214 are held in radially spaced coaxial relationship with each other and with respect to magnet 116 and the RF coils by epoxy used for layers 223 and 225, which contains alumina particulate material to increase its thermal con...

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Abstract

The present invention provides a cooling system for circulating a coolant to cool a patient bore (140). In one embodiment, the patient bore (140) comprises two concentric cylinders (131, 132) separated by a longitudinally or helically laid partition (133). In another embodiment of the invention, the fluid may be delivered helically or longitudinally along the tube (232) joined to the outer diameter of the patient's bore (240), such that those portions of the bore facing the patient are cooled directly. In a third embodiment, RF coil (330) may form part of patient bore (340), while helical or longitudinal fluid channel 332 surrounds patient bore (340).

Description

technical field [0001] The present invention relates generally to magnetic resonance imaging (MRI) systems, and more particularly to components designed to dissipate heat generated by gradient coils and RF coils used in MRI. Background technique [0002] When a substance such as human tissue encounters a uniform magnetic field (polarization field B 0 ), the individual magnetic moments of the spins in the tissue try to align with the polarization field, but precess around it in random order at their characteristic Larmor frequency. If the substance or tissue encounters a magnetic field in the x-y plane and close to the Larmor frequency (excitation field B 1 ), then the net alignment moment or "longitudinal magnetization" M z can be rotated or "tipped" into the x-y plane, resulting in a net transverse magnetic motion M t . In the excitation signal B 1 When it's done, the excited spins send out a signal that can be received and processed to form an image. [0003] During ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/28A61B5/055G01R33/34G01R33/38H01F7/20H01F27/10H01F27/32
CPCG01R33/3403G01R33/34046G01R33/3804H01F7/202H01F27/10H01F27/322G01R33/34
Inventor N·克拉克M·B·塞勒斯M·L·阿尔福特A·曼通
Owner GE MEDICAL SYST GLOBAL TECH CO LLC
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