MRI scanner

Patent metadata

Field	Value
Publication number	US-9880237-B2
Application number	US-201314038370-A
Country	US
Kind code	B2
Filing date	Sep 26, 2013
Priority date	Sep 27, 2012
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

Abstract

A magnetic resonance imaging (MRI) scanner includes a control device, a gradient coil for generating a gradient field, a gradient coil connector for connecting the gradient coil to the control device, and a temperature sensor. The temperature sensor is configured and disposed to detect a temperature of the gradient coil connector.

First claim

The invention claimed is:

1. A magnetic resonance imaging (MRI) scanner comprising:
a control device comprising a frequency control device;
a B0 coil arrangement;
a B1 coil arrangement;
a gradient coil for generating a gradient field;
a gradient coil connector for connecting the gradient coil to the control device;
a tube bore;
a cooling device for directly cooling components of the MRI scanner, the cooling device not directly cooling the gradient coil connector or the tube bore; and
a temperature sensor, wherein the temperature sensor is configured and disposed to detect a temperature of the gradient coil connector or the tube bore,
wherein the frequency control device is connected to the B1 coil arrangement and is configured to control a B1 frequency of a magnetic field generated by the B1 coil arrangement, and
wherein the frequency control device is connected to the temperature sensor to receive a temperature signal from the temperature sensor.

2. The MRI scanner as claimed in claim 1 , further comprising a casing for accommodating the B0 coil arrangement.

3. The MRI scanner as claimed in claim 1 , wherein the frequency control device is configured to control the B1 frequency as a function of the temperature signal.

4. The MRI scanner as claimed in claim 3 , wherein the frequency control device is configured to generate the frequency proportionally to the temperature signal.

5. The MRI scanner as claimed in claim 4 , wherein the frequency control device is configured to generate the frequency proportionally to the temperature signal with a proportionality factor of 16.6 to 30.

6. The MRI scanner as claimed in claim 4 , wherein the frequency control device is configured to generate the frequency additionally with a predetermined additive constant.

7. A method for controlling a magnetic resonance imaging (MRI) scanner having directly cooled and not directly cooled components, the method comprising:
generating a control signal for a B1 coil arrangement; and
detecting a temperature of a gradient coil connector or a tube bore,
wherein the generating comprises generating the control signal as a function of the detected temperature, a frequency of the control signal being formed as a function of the detected temperature,
wherein the generating further comprises generating the control signal such that a frequency of the control signal is generated proportionally to the detected temperature, and
wherein the generating further comprises generating the control signal such that the frequency of the control signal is generated proportionally to the detected temperature using a proportionality factor of 16.6 to 30.

Assignees

• Dewdney Andrew
• Siemens Ag

Inventors

• Dewdney Andrew

Classifications

• G01R33/3403 Primary

  Means for cooling of the RF coils, e.g. a refrigerator or a cooling vessel specially adapted for housing an RF coil · CPC title

• G01R33/3804 Primary

  Additional hardware for cooling or heating of the magnet assembly, for housing a cooled or heated part of the magnet assembly or for temperature control of the magnet assembly · CPC title

• G01R33/56563

  caused by a distortion of the main magnetic field B0, e.g. temporal variation of the magnitude or spatial inhomogeneity of B0 (G01R33/56509, G01R33/56518, G01R33/56536 take precedence) · CPC title