US 12,544,594 B2Granted

Devices and methods for adaptively controlling a radiotherapy apparatus

AssigneeElekta Limited

InventorsMichael McGrain Flores, Igor Sinitsyn, Elizabeth Jean Lansing, Alain Omar Rodriguez

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Abstract

Methods, systems and computer-readable media for controlling a radiotherapy apparatus are disclosed. A method for controlling a radiotherapy apparatus comprises obtaining a first treatment plan comprising positioning information of a beam shaping apparatus of the radiotherapy apparatus; receiving, during delivery of a radiation therapeutic beam to a target on a patient, information including a positional shift of the target; and generating a revised treatment plan based on the first treatment plan, the generating of the revised treatment plan comprising determining an updated configuration of the beam shaping apparatus from the positioning information of the first treatment plan based on the positional shift of the target.

Claims19

Dependent claims

A method for controlling a radiotherapy apparatus, the method comprising:

obtaining a first treatment plan comprising positioning information of a beam shaping apparatus of the radiotherapy apparatus;
receiving, during delivery of a radiation therapeutic beam to a target on a patient, information indicating a positional shift of the target;
and
generating a revised treatment plan based on the first treatment plan, the generating of the revised treatment plan comprising determining an updated configuration of the beam shaping apparatus from the positioning information of the first treatment plan based on the positional shift of the target, wherein the positioning information of the beam shaping apparatus in the first treatment plan comprises an opening of a multi-leaf collimator defined by a polygon defined by vertices, and wherein determining the updated configuration of the beam shaping apparatus comprises determining an updated polygon by updating the vertices, and wherein the updated vertices are calculated according to the following formula:
x
1
=
x
0
·
h
+
Δ
⁢
x
·
H
h
-
Δ
⁢
z
y
1
=
y
0
·
h
+
Δ
⁢
y
·
H
h
-
Δ
⁢
z
and wherein:
Δx, Δy, and Δz are calculated from original Δx0, Δv0, Δz0 using linear transformation:
[
Δ
⁢
x
Δ
⁢
z
Δ
⁢
y
]
=
[
cos
⁢
θ
sin
⁢
θ
0
sin
⁢
θ
-
cos
⁢
θ
0
0
0
1
]
[
Δ
⁢
x
0
Δ
⁢
y
0
Δ
⁢
z
0
]
.

86 more elements

A non-transitory computer-readable medium comprising computer-executable instructions that, when executed by a processor of a computing device, cause the processor to:

obtain a first treatment plan comprising positioning information of a beam shaping apparatus of a radiotherapy apparatus;
receive, during delivery of a radiation therapeutic beam to a target on a patient, information indicating a positional shift of the target;
and
generate a revised treatment plan based on the first treatment plan, the generating of the revised treatment plan comprising determining an updated configuration of the beam shaping apparatus from the positioning information of the first treatment plan based on the positional shift of the target, wherein the positioning information of the beam shaping apparatus in the first treatment plan comprises an opening of a multi-leaf collimator defined by a polygon defined by vertices, and wherein determining the updated configuration of the beam shaping apparatus comprises determining an updated polygon by updating the vertices, and wherein the updated vertices are calculated according to the following formula:
x
1
=
x
0
·
h
+
Δ
⁢
x
·
H
h
-
Δ
⁢
z
y
1
=
y
0
·
h
+
Δ
⁢
y
·
H
h
-
Δ
⁢
z
and wherein:
Δx, Δy, and Δz are calculated from original Δx0, Δy0, Δz0 using linear transformation:
[
Δ
⁢
x
Δ
⁢
z
Δ
⁢
y
]
=
[
cos
⁢
θ
sin
⁢
θ
0
sin
⁢
θ
-
cos
⁢
θ
0
0
0
1
]
[
Δ
⁢
x
0
Δ
⁢
y
0
Δ
⁢
z
0
]
.

86 more elements

A radiotherapy apparatus comprising:

a beam shaping apparatus;
and
a controller to:
obtain a first treatment plan comprising positioning information of the beam shaping apparatus;
receive, during delivery of a radiation therapeutic beam to a target on a patient, information indicating a positional shift of the target;
and
generate a revised treatment plan based on the first treatment plan, the generating of the revised treatment plan comprising determining an updated configuration of the beam shaping apparatus from the positioning information of the first treatment plan based on the positional shift of the target, wherein the positioning information of the beam shaping apparatus in the first treatment plan comprises an opening of a multi-leaf collimator defined by a polygon defined by vertices, and wherein determining the updated configuration of the beam shaping apparatus comprises determining an updated polygon by updating the vertices, and wherein the updated vertices are calculated according to the following formula:
x
1
=
x
0
·
h
+
Δ
⁢
x
·
H
h
-
Δ
⁢
z
y
1
=
y
0
·
h
+
Δ
⁢
y
·
H
h
-
Δ
⁢
z
and wherein:
Δx, Δy, and Δz are calculated from original Δx0, Δy0, Δz0 using linear transformation:
[
Δ
⁢
x
Δ
⁢
z
Δ
⁢
y
]
=
[
cos
⁢
θ
sin
⁢
θ
0
sin
⁢
θ
-
cos
⁢
θ
0
0
0
1
]
[
Δ
⁢
x
0
Δ
⁢
y
0
Δ
⁢
z
0
]
.

89 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/475,717Filed 27 Sep 2023 · continuation in part
Priority: NL 203362228 Nov 2022
Published: US 2024/0100363 A14 Apr 2024
Granted: 10 Feb 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

A61N 5/1038
Treatment planning systems: taking into account previously administered plans applied to the same patient, i.e. adaptive radiotherapy
A61N 5/1037
Treatment planning systems: taking into account the movement of the target, e.g. 4D-image based planning
A61N 5/1039
Treatment planning systems: using functional images, e.g. PET or MRI
A61N 5/1045
With spatial modulation of the radiation beam within the treatment head: using a multi-leaf collimator, e.g. for intensity modulated radiation…