Method for dose control

Patent metadata

Field	Value
Publication number	US-12484873-B2
Application number	US-202519017866-A
Country	US
Kind code	B2
Filing date	Jan 13, 2025
Priority date	Jan 15, 2024
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

One or more example embodiments relates to a computer-implemented method for dose control with an automatic exposure control. The method comprises receiving a first time-course, receiving a second time-course, and receiving a cut-off dose. The method comprises determining a first weight, determining a second weight, multiplying a latest value of the first time-course with the first weight, wherein a first weighted accumulated dose is determined and multiplying a latest value of the second time-course with the second weight, wherein a second weighted accumulated dose is determined. The method comprises adding the first and the second weighted accumulated dose, wherein a weighted overall applied dose is determined, comparing the weighted overall applied dose with the cut-off dose, and providing a result of the comparison.

First claim

The invention claimed is:

1 . A computer-implemented method for dose control with an automatic exposure control, the automatic exposure control including at least a first sub-chamber and a second sub-chamber, and the method comprising:
applying radiation to the first sub-chamber and the second sub-chamber; receiving a first time-course of a first accumulated dose from the first sub-chamber; receiving a second time-course of a second accumulated dose from the second sub-chamber; receiving a predetermined cut-off dose; determining a first weight based on the first time-course; determining a second weight based on the second time-course; multiplying a latest value of the first time-course with the first weight to determine a first weighted accumulated dose; multiplying a latest value of the second time-course with the second weight to determine a second weighted accumulated dose; adding the first weighted accumulated dose and the second weighted accumulated dose to determine a weighted overall applied dose; comparing the weighted overall applied dose with the predetermined cut-off dose to obtain a comparison result; and performing at least one of,
providing a warning via a user interface based on the weighted overall applied dose equaling or exceeding the predetermined cut-off dose, or
stopping the applying the radiation based on the weighted overall applied dose equaling or exceeding the predetermined cut-off dose.

2 . The method of claim 1 , wherein the performing includes the stopping the applying the radiation based on the weighted overall applied dose equaling or exceeding the predetermined cut-off dose.

3 . The method of claim 1 , wherein at least one of:
the first time-course is associated with a first gradient, the determining the first weight including determining the first weight based on the first gradient; or the second time-course is associated with a second gradient, the determining the second weight including determining the second weight based on the second gradient.

4 . The method of claim 3 , wherein at least one of:
the first weight is anti-proportional to the first gradient; or the second weight is anti-proportional to the second gradient.

5 . The method of claim 3 , wherein
at least one of:
the determining the first weight determines the first weight,
to have a first value based on the first gradient being below a predetermined threshold, or
to have a second value based on the first gradient being above the predetermined threshold, or

the determining the second weight determines the second weight,
to have the first value based on the second gradient being below the predetermined threshold, or
to have the second value based on the second gradient being above the predetermined threshold; and

the first value is larger than the second value.

6 . The method of claim 1 , further comprising:
repeating the method while the weighted overall applied dose equals or exceeds the predetermined cut-off dose.

7 . An automatic exposure control comprising:
at least a first sub-chamber and a second sub-chamber, wherein the automatic exposure control is configured to perform the method of claim 1 .

8 . The automatic exposure control of claim 7 , wherein a number of sub-chambers are distributed over an area which corresponds to an imaging area of a detector, the number of sub-chambers including the first sub-chamber and the second sub-chamber.

9 . The automatic exposure control of claim 8 , wherein the number of sub-chambers are equally distributed over the imaging area.

10 . A system for dose control comprising:
the automatic exposure control of claim 7 ; an interface; and a computation unit, at least one of the interface or the computation unit being configured to cause the system to:
receive the first time-course of the first accumulated dose from the first sub-chamber,
receive the second time-course of the second accumulated dose from the second sub-chamber,
receive the predetermined cut-off dose,
determine the first weight based on the first time-course,
determine the second weight based on the second time-course,
multiply the latest value of the first time-course with the first weight to determine the first weighted accumulated dose,
multiply the latest value of the second time-course with the second weight to determine the second weighted accumulated dose,
add the first weighted accumulated dose and the second weighted accumulated dose to determine the weighted overall applied dose,
compare the weighted overall applied dose with the predetermined cut-off dose to obtain the comparison result, and
provide the comparison result.

11 . A non-transitory computer program product comprising program elements that, when executed by a system, causes the system to perform the method of claim 1 .

12 . A non-transitory computer-readable storage medium comprising program elements that, when executed by a system, causes the system to perform the method of claim 1 .

13 . The method of claim 2 , wherein at least one of:
the first time-course is associated with a first gradient, the determining the first weight including determining the first weight based on the first gradient; or the second time-course is associated with a second gradient, the determining the second weight including determining the second weight based on the second gradient.

14 . The method of claim 13 , wherein at least one of:
the first weight is anti-proportional to the first gradient; or the second weight is anti-proportional to the second gradient.

15 . The method of claim 2 , further comprising:
repeating the method while the weighted overall applied dose equals or exceeds the predetermined cut-off dose.

16 . The method of claim 1 , wherein the performing includes the providing a warning via a user interface based on the weighted overall applied dose equaling or exceeding the predetermined cut-off dose.

17 . The method of claim 1 , wherein the performing includes both of:
the providing a warning via a user interface based on the weighted overall applied dose equaling or exceeding the predetermined cut-off dose; and the stopping the applying the radiation based on the weighted overall applied dose equaling or exceeding the predetermined cut-off dose.

18 . The method of claim 16 , wherein at least one of:
the first time-course is associated with a first gradient, the determining the first weight including determining the first weight based on the first gradient; or the second time-course is associated with a second gradient, the determining the second weight including determining the second weight based on the second gradient.

19 . The method of claim 18 , wherein at least one of:
the first weight is anti-proportional to the first gradient; or the second weight is anti-proportional to the second gradient.

20 . The method of claim 16 , further comprising:
repeating the method while the weighted overall applied dose equals or exceeds the predetermined cut-off dose.

Assignees

• Siemens Healthineers Ag

Inventors

• Cai Xiaoyun
• Geiger Bernhard

Classifications

• H05G1/44

  in which the switching instant is determined by measuring the amount of radiation directly {(dosimetry in general G01T1/02)} · CPC title

• G01T1/02

  Dosimeters (G01T1/15 takes precedence) · CPC title

• A61B6/4233

  using matrix detectors · CPC title

• A61B6/545

  involving automatic set-up of acquisition parameters · CPC title

• A61B6/58

  Testing, adjusting or calibrating thereof · CPC title