# US 10,118,053 B2 · Apparatus, method, and program for movable part tracking and treatment

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- Number: US 10,118,053 B2
- Document ID: US10118053B2
- Status: Granted
- Kind: B2
- Application number: 15/797,778
- Filed: 2017-10-30
- Published: 2018-03-08
- Granted: 2018-11-06
- Earliest claimed: 2014-12-18
- Assignees: Kabushiki Kaisha Toshiba
- Applicants: Kabushiki Kaisha Toshiba
- Inventors: Koki Yanagawa; Shinya Fukushima; Kazunao Maeda; Keiko Okaya
- Web page: https://patentgrep.com/patent/US10118053B2

## CPC

- A61N 5/1049: {for verifying the position of the patient with respect to the radiation beam}
- A61N 5/1067: {in real time, i.e. during treatment}
- G06T 7/248: {involving reference images or patches}
- A61N 2005/1061: {using an x-ray imaging system having a separate imaging source}
- G06T 2207/10081: Computed x-ray tomography [CT]
- G06T 2207/30061: Lung
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL

## Abstract

A movable part tracking and treatment apparatus includes an acquisition unit adapted to acquire a three-dimensional moving image and a first projection image generation unit adapted to generate a first projection moving image. The apparatus further includes an affected part image extraction unit adapted to extract the displaced affected part area from the first projection moving image and a tracing target image extraction unit adapted to extract the displaced tracing target from the first projection moving image. The apparatus also includes a first parameter derivation unit adapted to derive a first parameter indicative of position information on a beam irradiation point and a second parameter derivation unit adapted to derive a second parameter necessary to extract the corresponding tracing target.

## Claims

### Claim 1

A method for movable part tracking and treatment, comprising:
a step to extract an affected part area and a tracing target from a first moving image, the affected part area and the tracing target displaced together in conjunction with a repetitive displacement of respiration, the first moving image acquired by imaging an inside of a body of a patient;
a step to compare a repetitive displacement of the affected part area and the tracing target to analyze a phase condition of the tracing target, the phase condition matches with a beam irradiation point selected from displacement of the affected part area;
a step to identify the tracing target from a second moving image of the patient imaged after a treatment table having the patient mounted thereon and being moved for aiming the beam irradiation point;
a step to determine whether or not a phase of the tracing target displaced in the second moving image satisfies the phase condition; and
a step to emit the beam at a timing when it is determined that the phase condition is satisfied.

### Claim 2 (depends on 1)

The method for movable part tracking and treatment according to claim 1, wherein the tracing target is internal organ or rib.

### Claim 3

A movable part tracking and treatment apparatus, comprising:
an image extraction unit adapted to extract an affected part area and a tracing target from a first moving image, the affected part area and the tracing target displaced together in conjunction with a repetitive displacement of respiration, the first moving image acquired by imaging an inside of a body of a patient;
an analysis unit adapted to compare a repetitive displacement of the affected part area and the tracing target to analyze a phase condition of the tracing target, the phase condition matches with a beam irradiation point selected from displacement of the affected part area;
a tracing target identification unit adapted to identify the tracing target from a second moving image of the patient imaged after a treatment table having the patient mounted thereon and being moved for aiming the beam irradiation point;
a phase determination unit adapted to determine whether or not a phase of the tracing target displaced in the second moving image satisfies the phase condition; and
a beam emission unit adapted to emit the beam at a timing when it is determined that the phase condition is satisfied.

### Claim 4 (depends on 3)

The movable part tracking and treatment apparatus according to claim 3, wherein the tracing target is internal organ or rib.