Irradiation apparatus and irradiation method using same

Patent metadata

Field	Value
Publication number	US-12588131-B2
Application number	US-202218695583-A
Country	US
Kind code	B2
Filing date	Aug 22, 2022
Priority date	Sep 29, 2021
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

Provided is a radiation irradiation device and method in which radiation intensity can be adjusted depending on an irradiation position. The device includes a radiation source, a target plate having an irradiation hole through which radiation emitted from the radiation source passes and having a first target stopper and a second target stopper formed to protrude on both surfaces, respectively, X-axis shield plates and Y-axis shield plates coupled to both sides of one surface of the target plate and including shield stoppers formed on a contact surface with the target plate and capable of being moved with respect to the target plate. The X-axis shield plate are coupled laterally with shield stoppers capable of moving laterally and the Y-axis plate are coupled longitudinally with shield stoppers capable of moving longitudinally. The shield stoppers can be moved between two first target stoppers or two second target stoppers adjacent to each other.

First claim

The invention claimed is:

1 . A radiation irradiating device, comprising:
a radiation source; a target plate having an irradiation hole through which radiation emitted from the radiation source passes, and having a first target stopper and a second target stopper formed to protrude on both surfaces, respectively; X-axis shield plates coupled to both sides in a lateral direction of one surface of the target plate, having an X-axis shield stopper formed on a contact surface with the target plate, and capable of being laterally moved with respect to the target plate; and Y-axis shield plates coupled to both sides in a longitudinal direction of the other surface of the target plate, having a Y-axis shield stopper formed on a contact surface with the target plate, and capable of being longitudinally moved with respect to the target plate, wherein the X-axis shield stopper is capable of being moved between two first target stoppers adjacent to each other, and wherein the Y-axis shield stopper is capable of being moved between two second target stoppers adjacent to each other.

2 . The radiation irradiation device of claim 1 , comprising:
a frame coupled to the target plate, the X-axis shield plates, and the Y-axis shield plates to be relatively moved with respect to each other, and having a through-hole overlapping the irradiation hole in an irradiation direction of the radiation, wherein the through-hole has a cross-sectional area that is larger than the cross-sectional area of the irradiation hole and is smaller than that of the target plate.

3 . The radiation irradiation device of claim 2 ,
wherein a lateral width of the through-hole is formed to be smaller than the sum of a lateral width of the target plate divided in half and a lateral width of the X-axis shield plates, and wherein a longitudinal width of the through-hole is formed to be smaller than the sum of a longitudinal width of the target plate divided in half and a longitudinal width of the Y-axis shield plates.

4 . The radiation irradiation device of claim 2 ,
wherein, the X-axis shield plates have X-axis shield coupling protrusions formed to protrude from both ends in the longitudinal direction, wherein, the Y-axis shield plates have Y-axis shield coupling protrusions formed to protrude from both ends in the lateral direction, respectively, wherein, the frame has a guide groove formed to be recessed, and while the X-axis shield coupling protrusions or the Y-axis shield coupling protrusion are inserted into the guide groove, the guide groove guides a movement path of the X-axis shield plates or the Y-axis shield plates.

5 . The radiation irradiation device of claim 1 , comprising:
a controller configured to adjust an intensity of the radiation irradiated to a specific point.

6 . The radiation irradiation device of claim 5 , wherein the controller comprises:
a scan rate controller configured to adjust a scan rate of the radiation source; a continuation time controller configured to adjust a radiation irradiation time for the specific point; and a radiation dose distribution corrector configured to calculate a radiation dose distribution correction coefficient for each point in an irradiation area, and apply the calculation result to the radiation source.

7 . The radiation irradiation device of claim 1 , wherein the radiation source is capable of emitting the radiation repeatedly multiple times with respect to a specific point.

8 . The radiation irradiation device of claim 1 , wherein the radiation emitted from the radiation source is an X-ray.

9 . A radiation irradiation method using the radiation irradiation device of claim 1 , comprising:
adjusting a position of the target plate; emitting the radiation from the radiation source toward the target plate; and controlling a radiation dose emitted from the radiation source.

10 . The radiation irradiation method of claim 9 , wherein the adjusting comprises:
adjusting a lateral position of the target plate; and adjusting a longitudinal position of the target plate.

11 . The radiation irradiation method of claim 9 , wherein the method further comprises correcting a distribution of the radiation dose emitted from the radiation source prior to the emitting.

12 . The radiation irradiation method of claim 9 , wherein the controlling comprises:
controlling a scan rate of the radiation source.

13 . The radiation irradiation method of claim 9 , wherein the controlling comprises:
controlling a continuation time of the radiation with respect to a specific position.

14 . A radiation irradiating device, comprising:
a radiation source; a frame having a through-hole through which radiation emitted from the radiation source passes, and having frame rails extended in a longitudinal direction on both sides of a lateral direction of one surface; a target plate including at least one pair of leaves and a leaf guider disposed on both sides of the at least one pair of leaves in the longitudinal direction, respectively, and having a target stopper formed on both sides of the longitudinal direction; and a shield plate coupled to both sides of the longitudinal direction of the target plate, formed with a shield stopper on a contact surface with the target plate, and movable in the longitudinal direction with respect to the target plate, wherein the at least one pair of leaves are capable of being moved laterally between the two leaf guiders and moved longitudinally along the frame rail, and wherein the shield stopper is capable of being moved between the target stopper and the leaf guider.

15 . The radiation irradiation device of claim 14 , wherein a longitudinal width of the through-hole is formed to be smaller than the sum of a longitudinal width of the target plate divided in half and a longitudinal width of the shield plate.

16 . The radiation irradiation device of claim 14 , wherein the target plate comprises:
a wing extended from one side of the longitudinal direction of the leaf guider in a direction away from the leaves, and having a target stopper formed on one end thereof.

17 . The radiation irradiation device of claim 14 , wherein the leaves have a leaf rail extended in the lateral direction on both surfaces of the longitudinal direction, and are capable of being moved in the lateral direction by an X-axis position variable unit rotated along the leaf rail.

18 . The radiation irradiation device of claim 14 ,
wherein the frame has a guider formed to be recessed, and the guider guides a longitudinal movement path of the shield plate, and wherein the shield plate has shield coupling protrusions formed to protrude from both ends in the lateral direction, and the shield coupling protrusions are inserted into the guider and are movable along the guider.

19 . The radiation irradiation device of claim 14 , comprising:
a controller configured to adjust an intensity of the radiation irradiated to a specific point.

20 . The radiation irradiation device of claim 19 , wherein the controller comprises:
a scan rate controller configured to adjust a scan rate of the radiation source; a continuation time controller configured to adjust a radiation irradiation time for the specific point; and a radiation dose distribution corrector configured to calculate a radiation dose distribution correction coefficient for each point in an irradiation area, and apply the calculation result to the radiation source.

Assignees

• Nat Cancer Ct

Inventors

• Shin Dong Ho
• Kim Tae Hyun
• Kim Hak Soo
• Lee Se Byeong
• Lim Young Kyung
• Jeong Jong Hwi

Classifications

• H05G1/46

  Combined control of different quantities, e.g. exposure time as well as voltage or current · CPC title

• H05G1/38

  Exposure time {(time switches in general H01H43/00 and subgroups)} · CPC title

• A61N2005/1094

  Shielding, protecting against radiation · CPC title

• A61N2005/1019

  Sources therefor · CPC title

• G21K1/046

  varying the contour of the field, e.g. multileaf collimators · CPC title