MR scanner with a setting mechanism for patient-dependent control of the radio-frequency fields and magnetic fields
AssigneeSiemens Aktiengesellschaft
InventorMatthias Drobnitzky
Life of this patent
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Abstract
An MR scanner with a setting mechanism for patient-dependent control of the radio-frequency fields and magnetic fields for adhering to individual SAR and dB/dt limits, has an optical measuring device containing a distance sensor for determining the surface of a patient and for determining a setting signal for the setting mechanism.
Claims7
In a magnetic resonance scanner having at least one radio-frequency coil which generates a radio-frequency field and at least one gradient coil which generates a gradient magnetic field, and a setting circuit for controlling said radio-frequency coil and said gradient coil to set said radio-frequency field and said gradient magnetic field within patient-dependent SAR and dB/dt limits, the improvement of said setting circuit comprising:
- an optical measuring device having a field of view adapted to encompass at least a portion of a patient, for generating a signal representing an entirety of a surface of said patient facing said optical measuring device;
- and
- a unit supplied with said signal for determining a setting signal for said radio-frequency coil and said gradient coil dependent on said surface.
Dependencies are inferred from the claim text.