Circuit arrangement for an mrt system, mrt system and method for operating an mrt system

A circuit device and equipment technology, applied in the direction of measuring devices, applications, electrical components, etc., can solve the problems of redundant design, manufacturing and cost consumption, and achieve the effect of simple cost and suitable modification feasibility

Active Publication Date: 2019-05-17
SIEMENS HEALTHCARE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This can lead, for example, to completely redundant design of cer

Method used

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  • Circuit arrangement for an mrt system, mrt system and method for operating an mrt system
  • Circuit arrangement for an mrt system, mrt system and method for operating an mrt system
  • Circuit arrangement for an mrt system, mrt system and method for operating an mrt system

Examples

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Example Embodiment

[0061] The examples set forth below are preferred embodiments of the present invention. In the examples, the components described in the embodiments are separate and independently considerable features of the present invention. The features also improve the present invention independently of each other, and then also individually or in combination with those shown. Combinations of different combinations can be regarded as part of the present invention. In addition, the described embodiments can also be supplemented by other features of the already described features of the present invention.

[0062] In the drawings, elements that are the same, have the same function, or correspond to each other are respectively provided with the same reference signs.

[0063] figure 1 A schematic diagram of the first gradient amplifier 1 is shown, as it can be used in an MRT device, for example. The first gradient amplifier 1 here includes a regulator or regulating device 2, a modulator 3 and a...

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PUM

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Abstract

A circuit arrangement for an MRT system, an MRT system with the circuit arrangement and a method for operating an MRT system are disclosed. The circuit arrangement includes a gradient amplifier havinga switch-mode output stage, a regulator device, and a modulator connected therebetween in the circuit. To ensure patient safety, a control path is integrated into a drive path of the circuit arrangement or the MRT system provided for driving a gradient coil, the gradient coil being connected to an output of the switch-mode output stage. The control path includes a limiter stage connected downstream of the regulator device, the modulator, the switch-mode output stage and its supply voltage. The limiter stage is connected in the circuit between the regulator device and an input of the modulator, to limit a control signal output by the regulator device and limit the voltage for the gradient coil provided by the switch-mode output stage at its output.

Description

technical field [0001] The invention relates to a circuit arrangement for an MRT system, an MRT system having such a circuit arrangement and a method for operating such an MRT system. Background technique [0002] Today, in magnetic resonance tomography (MRT) or magnetic resonance imaging, high voltages, field strengths and gradients, ie spatial variations, in particular of the magnetic flux density B, and rapid temporal variations, ie variation rates, are used. At the same time, implants, in particular implants with metal parts, are increasingly used. For the examination of patients with implants, in particular active implants, eg cardiac pacemakers, defibrillators or neurostimulators, in magnetic resonance imaging, ie in an MRT system, on the one hand the implant The implant must be suitable for this examination, ie suitable for use in an MRT device, and on the other hand the MRT device must not lead to a situation where the patient, the implant or the function of the imp...

Claims

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Application Information

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IPC IPC(8): G01R33/385G01R33/36A61B5/055
CPCG01R33/3852G01R33/288G01R33/543H03F3/217H03F2200/129H03F2200/301H03F2200/312H03F2200/351H03F2200/462
Inventor 赫尔穆特·伦兹马赛厄斯·格布哈特迪尔克·施奈德班格尔罗兰德·维尔纳
Owner SIEMENS HEALTHCARE GMBH
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