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US 2019/0290934 A1Published application
System For Monitoring The Position Of A Patient Receiving 4pi Radiation Therapy
AssigneeBrainlab AG
InventorsKajetan Berlinger, Stephan Fröhlich
Life of this patent
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Abstract
Disclosed is a method for determining a deviation of the position of an anatomical body part relative to a predetermined position defined by a radiation treatment plan. A monitoring image is taken of the anatomical body part at the instant that a predetermined control point defined in the treatment plan has been reached. The monitoring image is compared to a simulated image simulated from a planning image of the anatomical body from the perspective of a monitoring camera used to generate the monitoring image. The comparison allows for a determination of whether there is a positional deviation.
Claims19
A method for determining a deviation between a planned and an actual relative position between an anatomical body part of a patient's body and a radiation treatment apparatus, the method comprising executing, on at least one processor, steps of:
- a) acquiring, at the at least one processor, planned control point data describing predetermined control points each describing a predetermined operational state of the radiation treatment apparatus, the control points having a predetermined temporal order in which they are planned to be assumed by the radiation treatment apparatus and each control point being associated with a predetermined planned relative position between the anatomical body part and a monitoring imaging apparatus, wherein
- the planned control point data comprises planned position data describing planned relative positions between the anatomical body part and a treatment beam source of the radiation treatment apparatus and, for each at least one planned relative position, the operational state as a reference dose being a predetermined amount of a planned treatment dose associated with the respective at least one planned relative position, wherein each control point is described by at least one of planned relative positions;
- b) determining, at the at least one processor, current control point data describing whether the radiation treatment apparatus has assumed a predetermined control point, wherein the current control point data comprises monitoring dose data describing the current operational state as a monitoring dose being an amount of the planned treatment dose associated with at least one of a monitoring image or the at least one actual relative position between the anatomical body park and the treatment beam source;
- c) acquiring, at the at least one processor, monitoring image data describing at least one digital medical monitoring image of the anatomical body part in at least one monitoring relative position between the anatomical body part and the monitoring imaging apparatus, wherein the monitoring imaging apparatus is used to generate the monitoring image;
- d) acquiring, at the at least one processor, patient image data describing a predetermined medical image of the anatomical body part;
- e) determining, by the at least one processor and based on the monitoring dose data and the planned control point data, corresponding reference dose data describing a corresponding reference dose being the reference dose corresponding best within a predetermined interval to the monitoring dose;
- f) determining, by the at least one processor and based on the patient image data and the corresponding reference dose data, comparison image data describing at least one digital medical comparison image of the anatomical body part in the monitoring relative position, wherein the monitoring relative position is the planned relative position between the anatomical body part and the monitoring imaging apparatus;
- and
- g) determining, by the at least one processor and based on the comparison image data and the monitoring image data, position deviation data describing a positional deviation between (i) the planned relative position associated with the planned control point assumed by the radiation treatment apparatus and (ii) the monitoring relative position on the other hand,
- the method further comprising at least one of the following steps h1) and h2):
- h1) generating the comparison image data if the current control point data describes that the radiation treatment apparatus has assumed a predetermined control point, or
- h2) generating the monitoring image data if the current control point data describes that the radiation treatment apparatus has assumed a predetermined control point.
9 more elements
A non-transitory computer-readable storage medium having stored thereon computer-executable instructions that, when executed, configure at least one processor to:
- a) acquire planned control point data describing predetermined control points each describing a predetermined operational state of the radiation treatment apparatus, the control points having a predetermined temporal order in which they are planned to be assumed by a radiation treatment apparatus and each control point being associated with a predetermined planned relative position between an anatomical body part of a patient's body and a monitoring imaging apparatus, wherein
- the planned control point data comprises planned position data describing planned relative positions between the anatomical body part and a treatment beam source of the radiation treatment apparatus and, for each at least one planned relative position, the operational state as a reference dose being a predetermined amount of a planned treatment dose associated with the respective at least one planned relative position, wherein each control point is described by at least one of planned relative positions;
- b) determine current control point data describing whether the radiation treatment apparatus has assumed a predetermined control point, wherein the current control point data comprises monitoring dose data describing the current operational state as a monitoring dose being an amount of the planned treatment dose associated with at least one of a monitoring image or the at least one actual relative position between the anatomical body part and the treatment beam source;
- c) acquire monitoring image data describing at least one digital medical monitoring image of the anatomical body part in at least one monitoring relative position between the anatomical body part and the monitoring imaging apparatus, wherein the monitoring imaging apparatus is used to generate the monitoring image;
- d) acquire patient image data describing a predetermined medical image of the anatomical body part;
- e) determine, based on the monitoring dose data and the planned control point data, corresponding reference dose data describing a corresponding reference dose being the reference dose corresponding best within a predetermined interval to the monitoring dose;
- f) determine, based on the patient image data and the corresponding reference dose data, comparison image data describing at least one digital medical comparison image of the anatomical body part in the monitoring relative position, wherein the monitoring relative position is the planned relative position between the anatomical body part and the monitoring imaging apparatus;
- and
- g) determine, based on the comparison image data and the monitoring image data, position deviation data describing a positional deviation between (i) the planned relative position associated with the planned control point assumed by the radiation treatment apparatus and (ii) the monitoring relative position on the other hand,
- wherein the computer-executable instructions, when executed, further configure the processor to:
- h1) generate the comparison image data if the current control point data describes that the radiation treatment apparatus has assumed a predetermined control point, or
- h2) generate the monitoring image data if the current control point data describes that the radiation treatment apparatus has assumed a predetermined control point.
9 more elements
A system for determining a deviation between a planned and an actual relative position between an anatomical body part and a treatment beam source, the system comprising:
- at least one electronic data storage device storing at least planned control point data;
- a medical imaging device for generating a monitoring image, the medical imaging device being operably coupled to at least one processor for transmitting a signal to the at least one processor corresponding to monitoring image data;
- and
- a radiation treatment apparatus comprising a treatment beam source,
- wherein the at least one processor is operably coupled to the at least one electronic data storage device for acquiring, from the at least one data storage device, at least one of patient image data or the planned control point data, and for issuing a command to the radiation treatment apparatus for controlling the treatment beam source on the basis of position deviation data, wherein the at least one processor is further configured to:
- a) acquire the planned control point data describing predetermined control points each describing a predetermined operational state of the radiation treatment apparatus, the control points having a predetermined temporal order in which they are planned to be assumed by the radiation treatment apparatus and each control point being associated with a predetermined planned relative position between an anatomical body part of a patient's body and the medical imaging device, wherein
- the planned control point data comprises planned position data describing planned relative positions between the anatomical body part and the treatment beam source of the radiation treatment apparatus and, for each at least one planned relative position, the operational state as a reference dose being a predetermined amount of a planned treatment dose associated with the respective at least one planned relative position, wherein each control point is described by at least one of planned relative positions;
- b) determine current control point data describing whether the radiation treatment apparatus has assumed a predetermined control point, wherein the current control point data comprises monitoring dose data describing the current operational state as a monitoring dose being an amount of the planned treatment dose associated with at least one of the monitoring image or the at least one actual relative position between the anatomical body part and the treatment beam source;
- c) acquire the monitoring image data describing at least one digital medical monitoring image of the anatomical body part in at least one monitoring relative position between the anatomical body part and the medical imaging device;
- d) acquire the patient image data describing a predetermined medical image of the anatomical body part;
- e) determine, based on the monitoring dose data and the planned control point data, corresponding reference dose data describing a corresponding reference dose being the reference dose corresponding best within a predetermined interval to the monitoring dose;
- f) determine, based on the patient image data and the corresponding reference dose data, comparison image data describing at least one digital medical comparison image of the anatomical body part in the monitoring relative position, wherein the monitoring relative position is the planned relative position between the anatomical body part and the medical imaging device;
- and
- g) determine, based on the comparison image data and the monitoring image data, the position deviation data describing a positional deviation between (i) the planned relative position associated with the planned control point assumed by the radiation treatment apparatus and (ii) the monitoring relative position on the other hand;
- wherein the at least one processor is further configured to:
- h1) generate he comparison image data if the current control point data describes that the radiation treatment apparatus has assumed a predetermined control point, or
- h2) generate the monitoring image data if the current control point data describes that the radiation treatment apparatus has assumed a predetermined control point.
14 more elements
Dependencies are inferred from the claim text.