Method for operating a magnetic resonance tomography device
First Claim
1. A method for operating a magnetic resonance tomography apparatus having a gradient system with at least one gradient coil arrangement for generating a gradient field in a spatial direction, said gradient field having gradient field properties, and having an energy supply device connected to the gradient coil arrangement, and said gradient coil arrangement including at least one first sub-coil and one second sub-coil, said method comprising the steps of:
- via said energy supply device, adjusting respective currents in said first sub-coil and said second sub-coil independently of each other; and
continuously adjusting at least one of said gradient field properties by determining and setting the current in at least one of said first and second sub-coils by solving an optimization task containing a target function and at least one secondary condition for avoiding stimulations in a living examination subject in said tomography device.
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Accused Products
Abstract
In a method for operating a magnetic resonance tomography device having a gradient system, which contains at least one gradient coil arrangement for generating a gradient field in a spatial direction and which also contains an energy supply device that is connected to the gradient coil arrangement, and wherein the gradient coil arrangement has at least one first sub-coil and one second sub-coil, and wherein the energy supply device is fashioned such that currents can be adjusted independently of one another in the sub-coils for the continuous adjustment of at least one property of the gradient field, the current in at least one of the sub-coils is determined and adjusted by solving an optimization task containing a target function and at least one secondary condition so that stimulations of a living examination subject are avoided.
38 Citations
24 Claims
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1. A method for operating a magnetic resonance tomography apparatus having a gradient system with at least one gradient coil arrangement for generating a gradient field in a spatial direction, said gradient field having gradient field properties, and having an energy supply device connected to the gradient coil arrangement, and said gradient coil arrangement including at least one first sub-coil and one second sub-coil, said method comprising the steps of:
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via said energy supply device, adjusting respective currents in said first sub-coil and said second sub-coil independently of each other; and
continuously adjusting at least one of said gradient field properties by determining and setting the current in at least one of said first and second sub-coils by solving an optimization task containing a target function and at least one secondary condition for avoiding stimulations in a living examination subject in said tomography device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification