# US 10,864,383 B2 · Respiratory gating system

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- Number: US 10,864,383 B2
- Document ID: US10864383B2
- Status: Granted
- Kind: B2
- Application number: 16/173,418
- Filed: 2018-10-29
- Published: 2019-02-28
- Granted: 2020-12-15
- Earliest claimed: 2016-04-29
- Assignees: Seoul National University Hospital; PAPRICA Lab. Co., Ltd.
- Applicants: Seoul National University Hospital; PAPRICA Lab. Co., Ltd.
- Inventors: Hong Gyun Wu; Jong Min Park; Chang Heon Choi; Jung In Kim
- Web page: https://patentgrep.com/patent/US10864383B2

## CPC

- A61B 5/486: {Biofeedback (using electroencephalography [EEG] A61B5/375)}
- A61N 5/107: {in real time, i.e. during treatment}
- A61B 5/0033: {Features or image-related aspects of imaging apparatus, e.g. for MRI, optical tomography or impedance tomography apparatus; Arrangements of imaging apparatus in a room}
- A61B 5/7285: {for synchronizing or triggering a physiological measurement or image acquisition with a physiological event or waveform, e.g. an ECG signal}
- A61N 5/00: Radiation therapy (ultrasound therapy A61N7/00; devices or apparatus applicable to both therapy and diagnosis A61B6/00)
- A61N 5/10: X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy (A61N5/01 takes precedence)
- A61N 5/1067: {in real time, i.e. during treatment}
- A61N 5/1068: {Gating the beam as a function of a physiological signal}
- A61B 5/1126: {using a particular sensing technique}
- A61B 5/113: occurring during breathing
- A61N 5/1049: {for verifying the position of the patient with respect to the radiation beam}
- A61N 2005/1055: {using magnetic resonance imaging [MRI]}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- 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)

## Abstract

The present disclosure relates to a respiratory gating system for inducing respiration of a patient during radiation therapy. A respiratory gating system according to one embodiment of the present disclosure comprises: an image management unit for acquiring an MRI image of a patient and processing the acquired image; and a projection unit for displaying the MRI image acquired and processed by the image management unit to the patient in real time, wherein the projection unit may be configured to project an image of a treatment area of the patient in real time using, as a screen, a bore of a radiotherapy equipment which is formed to surround the patient in order to acquire the MRI image.

## Claims

### Claim 1

A respiratory gating system for inducing respiration of a patient during radiation therapy, the respiratory gating system comprising:
an image management unit configured to acquire a magnetic resonance imaging (MRI) image of the patient and process the acquired MRI image;
a projection unit configured to display the MRI image acquired and processed in the image management unit to the patient in real time; and
a radiation irradiation unit configured to irradiate the patient with radiation according to a radiation therapy plan,
wherein the projection unit is configured to project an image of a treatment region of the patient in real time together with a predefined boundary according to the radiation therapy plan using a bore of a radiation therapy apparatus, which is formed to surround the patient to acquire the MRI image, as a screen.

### Claim 2 (depends on 1)

The respiratory gating system of claim 1, wherein the projection unit comprises a beam projector, and the beam projector is disposed outside the bore of the radiation therapy apparatus.

### Claim 3 (depends on 1)

The respiratory gating system of claim 1, wherein the image management unit comprises:
an image acquiring unit configured to acquire the MRI image of the patient;
a first converter configured to convert the image acquired in the image acquiring unit into an editable format;
an encoder configured to edit the image converted in the first converter; and
a second converter configured to convert the image edited in the encoder into a format of an image to be projected on the screen.

### Claim 4 (depends on 3)

The respiratory gating system of claim 3, wherein:
the first converter receives a high definition multimedia interface (HDMI) video signal from the image management unit and converts the HDMI video signal into a video graphics array (VGA) video signal; and
the second converter receives the VGA video signal from the encoder and converts the VGA video signal into an HDMI video signal.

### Claim 5 (depends on 3)

The respiratory gating system of claim 3, wherein the encoder enlarges a tumor part of the patient requiring treatment from the MRI image on the basis of a video signal transmitted from the first converter.

### Claim 6 (depends on 1)

The respiratory gating system of claim 1, wherein the radiation irradiation unit is configured to irradiate radiation only when a tumor that requires treatment is located within the predefined boundary on the basis of the MRI image acquired in the image management unit.