TREATMENT PLANNING SYSTEM, DEVICE FOR CALCULATING A SCANNING PATH AND PARTICLE THERAPY SYSTEM

• US 20140046113A1
• Filed: 10/17/2013
• Published: 02/13/2014
• Est. Priority Date: 06/30/2010
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: FUJIMOTO, Rintaro, NAGAMINE, Yoshihiko, UMEZAWA, Masumi, UMEKAWA, Toru, FUJII, Yusuke, AKIYAMA, Hiroshi
• Granted Patent: US 8,796,648 B2
• Time in Patent Office: Days
• US Class Current: 600/1
• CPC Class Codes: A61N 2005/1087 Ions; Protons
• CPC Class Codes: A61N 5/103 Treatment planning systems
• CPC Class Codes: A61N 5/1043 Scanning the radiation beam, e.g. spot scanning or raster scanning
• CPC Class Codes: A61N 5/1065 Beam adjustment

Abstract

In a particle therapy treatment planning system for creating treatment plan data, the movement of a target (patient'"'"'s affected area) is extracted from plural tomography images of the target, and the direction of scanning is determined by projecting the extracted movement on a scanning plane scanned by scanning magnets. Irradiation positions are arranged on straight lines parallel with the scanning direction making it possible to calculate a scanning path for causing scanning to be made mainly along the direction of movement of the target. The treatment planning system can thereby realize dose distribution with improved uniformity.

Claims

1. A treatment planning system for creating treatment plan information for particle therapy, comprising:

an input device;

an arithmetic device for performing arithmetic processing based on a result of input to the input device and creating treatment plan information; and

a display device for displaying the treatment plan information,

wherein the arithmetic device calculates a scanning path by setting a pre-specified direction as a main direction for scanning irradiation positions with an ion beam using scanning magnets, the pre-specified direction being along a direction of movement of a target of treatment, and

wherein the display device displays the direction of movement of the target of treatment.

2. The treatment planning system according to claim 1,

wherein the arithmetic device extracts the direction of movement of the target of treatment using at least one feature points in one or more images.

3. The treatment planning system according to claim 2,

wherein the arithmetic device calculates the scanning path based on the at least one feature points in the one or more images in different phases projected on an isocenter plane relative to the ion beam, where the at least one feature points are markers.

4. The treatment planning system according to claim 2,

wherein the arithmetic device calculates the scanning path based on the at least one feature points in the one or more images in different phases which exist in a specified region of the target and are projected on an isocenter plane relative to the ion beam, where the at least one feature points are markers.

5. The treatment planning system according to claim 2,

wherein the arithmetic device calculates the scanning path based on the at least one feature points of the one or more images in different phases, where the at least one feature points are markers.

6. The treatment planning system according to claim 2,

wherein the display device displays the moving direction of the target of treatment and the at least one feature points.

7. The treatment planning system according to claim 1,

wherein the display device displays the scanning path calculated by the arithmetic device.

8. The treatment planning system according to claim 1,

wherein the display device displays a component of the direction of movement of the target of treatment perpendicular to an isocenter plane with respect to the ion beam.

9. The treatment planning system according to claim 1,

wherein the direction of movement of the target of treatment extracted by the arithmetic device is changed according to the input received by the input device.

10. The treatment planning system according to claim 1,

wherein the direction of movement of the target of treatment is specified according to the input received by the input device.