US 8,541,762 B2Granted

Charged particle irradiation device and method

AssigneeIon Beam Applications S.A.

InventorsYves Claereboudt, Gregory Saive

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Abstract

A charged particle irradiation device (10) and method for irradiating a target volume (50), adapted for receiving a treatment plan (70) defining a series of prescribed irradiation points (140) having each a prescribed dose to be delivered is provided. The device includes an irradiation unit (40) having at least one scanning magnet (100; 110), and at least one beam position monitor (130) installed in between the said scanning magnet (100; 110) and said target volume (50) is provided. A controller (80) comprises means for calculating for any said prescribed irradiation point corresponding nominal magnetic settings of the scanning magnet such that a beam (90) is pointing to said prescribed irradiation point when corresponding magnetic settings are applied, and means for calculating corresponding expected position at said beam position monitor (130) according to said first correction.

Claims16

Dependent claims

A charged particle irradiation device (10) for irradiating a target volume (50), adapted for receiving a treatment plan (70) defining a series of prescribed irradiation points (140) having each a prescribed dose to be delivered, comprising an accelerator (20), a beam transport system (30) and an irradiation unit (40) having at least one scanning magnet (100;

110), a dose detector (120) and at least one beam position monitor (130) installed in between said scanning magnet (100;
110) and said target volume (50), a controller (80) comprising means for calculating for any said prescribed irradiation point corresponding nominal magnetic settings of the scanning magnet such that a beam (90) is pointing to said prescribed irradiation point when corresponding magnetic settings are applied, and means for calculating a corresponding expected position at said beam position monitor (130), characterized in that said controller (80) further comprises:
a) means for selecting a tuning reference point from said series of prescribed irradiation points;
b) means for specifying a prescribed tuning dose to be given to said selected tuning reference point, said prescribed tuning dose being equal or smaller than said prescribed dose at said selected tuning reference point;
c) means for comparing a beam position provided by the beam position monitor (130) and the expected position at said beam position monitor (130) for said selected tuning reference point;
d) means for computing a first correction to be applied to said nominal magnetic settings of the scanning magnet (100;
110) in order to align the beam position provided by the beam position monitor to the expected position at said beam position monitor (130) for said selected tuning reference point;
e) means for correcting the nominal magnetic settings of the scanning magnet for all said prescribed irradiation points according to said first correction.

5 more elements

A method for tuning the delivery of a charged particle beam (90) in a charged particle irradiation device (10) for irradiating a target volume (50), adapted for receiving a treatment plan (70) defining a series of prescribed irradiation points (140) having each a prescribed dose to be delivered, comprising an accelerator (20), a beam transport system (30) and an irradiation unit (40) having at least one scanning magnet (100;

110), a dose detector (120) and at least one beam position monitor (130) installed in between said scanning magnet (100;
110) and said target volume (50), a controller (80) comprising means for calculating for any of said prescribed irradiation points (140) corresponding nominal magnetic settings of the scanning magnet (100;
110) such that the beam is pointing to said prescribed irradiation point (140) when corresponding magnetic settings are applied, and means for calculating an expected position at said beam position monitor, characterized in that it comprises the steps of:
a) selecting a tuning reference point from said series of prescribed irradiation points (140);
b) specifying a prescribed tuning dose to be given to said selected tuning reference point, said prescribed tuning dose being equal or smaller than said prescribed dose at said selected tuning reference point;
c) comparing a beam position provided by the beam position monitor (130) and the expected position at said beam position monitor (130) for said selected tuning reference point;
d) computing a first correction to be applied to said nominal magnetic settings of the scanning magnet (100;
110) in order to align the beam position provided by the beam position monitor (130) to the expected position at said beam position monitor (130) for said selected tuning reference point;
e) correcting the nominal magnetic settings of the scanning magnet for all said prescribed irradiation points according to said first correction.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/637,096Filed 30 Mar 2011
Priority: EP 1015887331 Mar 2010
Published: US 2013/0026388 A131 Jan 2013
Granted: 24 Sep 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

A61N 5/00
Radiation therapy
A61N 5/1043
With spatial modulation of the radiation beam within the treatment head: scanning the radiation beam, e.g. spot scanning or raster scanning
A61N 5/1048
X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy: monitoring, verifying, controlling systems and methods
A61N 5/1065
For adjusting radiation treatment in response to monitoring: beam adjustment

Family

US 2013/0026388 A1Pre-grant publication · published 31 Jan 2013
US 8,541,762 B2This patent

From the US filing history. Foreign family members aren’t listed.

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