Method and arrangement for influencing magnetic particles and detecting interfering material
AssigneeKoninklijke Philips Electronics N.V.
InventorsBernhard Gleich, Jürgen Weizenecker
Life of this patent
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Abstract
The invention relates to a method and an arrangement for influencing magnetic particles in a region of action. Methods and arrangements of this kind can be used to determine the spatial distribution of magnetic particles in the region of action or to heat up the magnetic particles locally. If, in addition to the magnetic particles, there is also interfering material in the region of action then this material may heat up in an unwanted way. To avoid unwanted heating-up of this kind, any interfering material that may be present is detected beforehand. If there is interfering material present, then an examination or investigation, or treatment, can be carried out with changed system parameters.
Claims13
A method for influencing, in a region of action, magnetic particles that have been introduced into an object, the method comprising:
- a) detecting an interfering material in or on the object,
- b) generating a magnetic field having a pattern in space of its magnetic field strength such that a first sub-zone having a low magnetic field strength and a second sub-zone having a higher magnetic field strength are formed in the region of action,
- c) changing the position in space of the two sub-zones in the region of action so that the magnetization of the particles changes locally, and
- d) acquiring signals that depend on the magnetization in the region of action, which magnetization is influenced by the above change in position.
An arrangement for influencing magnetic particles in a region of action, comprising:
- a) means for detecting interfering material,
- b) means for generating a magnetic field having a pattern in space of its magnetic field strength such that a first sub-zone having a low magnetic field strength and a second sub-zone having a higher magnetic field strength are formed in the region of action,
- c) means for changing the position in space of the two sub-zones in the region of action, and
- d) means for acquiring signals, which signals depend on the magnetization in the region of action that is influenced by the change in the position in space of the sub-zones.
Dependencies are inferred from the claim text.