Koninklijke Philips Corporation N.v.

Teuvo Vaara

Erkki Tapani Vahala

Gosta J Ehnholm

Shunmugavelu D Sokka

G&ouml;sta Jakob Ehnholm

Max Oskar Köhler

The present disclosure relates to a method for controlling a magnetic resonance imaging guided radiation therapy apparatus () comprising a magnetic resonance imaging system (). The method comprises: acquiring magnetic resonance data using the magnetic resonance imaging system from an organ (), the organ being marked by a predefined marker; the magnetic resonance data comprising 3D image data; identifying in a reconstructed 2D image of the magnetic resonance data at least one signal void candidate of the marker; processing the 3D image data and the identified signal void for calculating a likelihood that the identified signal void candidate is part of the marker; outputting an indication of the calculated likelihood; in response to the outputting, receiving a user input specifying performing a radio therapy; and controlling the irradiation of the organ using the radiation therapy.

Radiotherapy system for accurate locating of 3D objects from magnetic resonance images

A therapy system includes a therapy module to perform successive deposits of energy in a target zone. The therapy system further includes a control module configured to, prior to deposits of energy, produce an a priori estimate of the induced heating. A thermometry module is configured to measure temperature in a measurement field. The induced heating may be derived based on a tissue model from the settings of a therapy module. The therapy module includes a high-intensity focused ultrasound transmitter. A magnetic resonance examination system configured for thermometry is employed as the thermometry module.

Therapy system for depositing energy

A therapy system includes a therapy module, e.g., a high-intensity-focused ultrasound transmitter, to perform successive deposits of energy in a target zone. The successive deposits being separated by a cool down period. The therapy system further includes a thermometry module, e.g. by a magnetic resonance examination system, configured for thermometry to measure temperature in a measurement field. A control module regulates the cool down period in dependence of the measured off-focus maximum temperature during the energy deposit preceding the cool down period.

An interface system is provided for planning a surgical procedure for inserting an object into a patient along a surgical planning trajectory from an entry point on the patient to a target point within the patient. Using an imaging device, a first scan of the patient is performed to generate a first image volume data set of a first area of the patient. A first sectional image of the patient is displayed on a human-readable display device associated with the imaging device. The first sectional image is based on the first image volume data set. Using an operator interface device, a second planning image of the patient is defined by placing a plurality of graphical point symbols in the first sectional image of the patient displayed on the display device. The plurality of graphical point symbols define a second area of the patient to be subject of display as a second sectional image of the patient. The second sectional image of the patient is derived either directly from the first image volume data set, indirectly from the first image volume data set by interpolation, or by performing a second scan of the patient with the imaging device.

Interface system for use with imaging devices to facilitate visualization of image-guided interventional procedure planning

A phantom ( ) is positioned on a patient support couch ( ) of a diagnostic imaging scanner ( ). The phantom includes a plurality of diagnostically imageable elements ( ) which are mounted in a fixed relationship such that when projections are made along three orthogonal axes, the projections of the diagnostically elements along each axis are non-overlapping. At least three markers ( ) on the phantom are monitored by infrared sensitive cameras ( ) or other pick-up devices and the location of the markers in image guided surgery (IGS) space is determined ( ). From a priori information about the structure of the phantom, the geometric centers of the imageable elements is determined and projected ( ) along the coordinate system axes of IGS space. The phantom is imaged by the diagnostic imaging system to generate projections of the diagnostically imageable elements along each of three coordinate axes of diagnostic image space. By comparing the centers of the imageable elements in the IGS coordinate system with the locations of the centers of the imageable elements in diagnostic image space, a transform between the IGS and image space coordinate systems is determined ( ). Subsequent diagnostic images of patient are transformed ( ) with the transform from diagnostic image to image guided surgery space.

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Teuvo Vaara