System and method to illustrate a radiation dose applied to different anatomical stages of an exposed subject

Patent metadata

Field	Value
Publication number	US-9649079-B1
Application number	US-201414510815-A
Country	US
Kind code	B1
Filing date	Oct 9, 2014
Priority date	Oct 9, 2014
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A system and method to illustrate a radiation dose applied to different organs of an exposed subject with diagnostic image acquisition by an imaging scanner is provided. From a scout image, a computer processor can calculate a contour of an extremity of the exposed subject from the two-dimensional scout image; calculate a contour of a first organ dependent on a greyscale intensity of the plurality of pixels that comprise the two-dimensional scout image; calculate a contour of at least one anatomical stage dependent on a predefined geometric orientation relative the contour of the first organ; and apply a predefined auxology criteria to calculate a contour of a second organ dependent on a predefined geometric orientation relative to the contour of the at least one anatomical stage; and create a display illustrative of the a measurement of dose applied at the area defined by the contour of the anatomical stage.

First claim

We claim:

1. A method of determination a radiation dose applied to different anatomical stages of an exposed subject with diagnostic image acquisition by an image acquisition system, the method comprising the steps of:
acquiring a two-dimensional frontal planar view scout image associated with the exposed subject acquired with the image acquisition system;
calculating with a computer processor a contour of an extremity of the exposed subject from the two-dimensional frontal planar view scout image;
calculating a contour of a first organ dependent on a greyscale intensity of the plurality of pixels that comprise the two-dimensional frontal planar view scout image;
calculating a contour of at least one anatomical stage dependent on a predefined geometric orientation relative the contour of the first organ;
applying a predefined auxology criteria to calculate a contour of a second organ dependent on a predefined geometric orientation relative to the contour of the at least one anatomical stage; and
create a display illustrative of a measurement of dose applied at the area defined by the contour of the at least one anatomical stage.

2. The method of claim 1 , further including the step of:
calculating a local dose of radiation applied within the contour of the at least one anatomical stage of the exposed subject.

3. The method of claim 2 , further including the step of:
creating a graphic display illustrative of the local radiation dose applied relative to the contour of the at least one anatomical stage of the exposed subject.

4. The method of claim 1 , wherein the step of calculating the contour of the first organ includes the steps of:
analyzing with the computer processor a greyscale intensity and a geometric location for each of the plurality of pixels with the scout image, the geometric location relative to a reference;
calculating with the computer processor a score for each of the plurality of pixels dependent on the greyscale intensity and the geometric location of each of the plurality of pixels.

5. The method of claim 4 , further including the step of:
calculating with the computer processor a subset of candidate pixels that define a predefined contour of the first organ of the exposed subject dependent on the score for each of the plurality of pixels; and
calculating with the computer processor, dependent on a comparison of the scores of the subset of candidate pixels to one another, the contour of the at least one anatomical stage of the exposed subject dependent on the predefined orientation of the contour of the first organ.

6. The method of claim 1 , wherein the at least one anatomical stage includes one of a head, a neck, a thorax, an abdomen, a pelvic region and a lower member of the exposed subject.

7. The method of claim 6 , wherein the first organ is a lung, and the contour of the thorax is defined by the contour of the lung.

8. The method of claim 1 , wherein the first organ is a lung and the at least one anatomical stage is an abdomen, and the step of applying a predefined auxology criteria to calculate the contour of the second organ includes estimating a contour of an abdomen dependent on the contour of the extremity of the exposed subject and a predefined dimension of the lung.

9. A system to illustrate a radiation dose applied to different organs of a exposed subject with diagnostic image acquisition by an imaging scanner, comprising:
acquiring a two-dimensional frontal planar view scout image associated with the exposed subject acquired with the imaging scanner;
calculating with a computer processor a contour of an extremity of the exposed subject from the two-dimensional frontal planar view scout image;
calculating a contour of a first organ dependent on a greyscale intensity of the plurality of pixels that comprise the two-dimensional frontal planar view scout image;
calculating a contour of at least one anatomical stage dependent on a predefined geometric orientation relative the contour of the first organ;
applying a predefined auxology criteria to calculate a contour of a second organ dependent on a predefined geometric orientation relative to the contour of the at least one anatomical stage;
creating a graphic display illustrative of the contour of the at least one anatomical stage.

10. The system of claim 9 , calculating a local dose of radiation applied within the contour of the at least one anatomical stage of the exposed subject.

11. The system of claim 10 , further including the step of:
creating a graphic display illustrative of the local radiation dose applied relative to the contour of the at least one anatomical stage of the exposed subject.

12. The system of claim 9 , wherein the step of calculating the contour of the first organ includes the steps of:
analyzing with the computer processor a greyscale intensity and a geometric location for each of the plurality of pixels with the scout image, the geometric location relative to a reference;
calculating with the computer processor a score for each of the plurality of pixels dependent on the greyscale intensity and the geometric location of each of the plurality of pixels.

13. The system of claim 12 , further including the step of:
calculating with the computer processor a subset of candidate pixels that define a predefined contour of the first organ of the exposed subject dependent on the score for each of the plurality of pixels; and
calculating with the computer processor, dependent on a comparison of the scores of the subset of candidate pixels to one another, the contour of the at least one anatomical stage of the exposed subject dependent on the predefined orientation of the contour of the first organ.

14. The system of claim 9 , wherein the at least one anatomical stage includes one of a head, a neck, a thorax, an abdomen, a pelvic region and a lower member of the exposed subject.

15. The system of claim 14 , wherein the first organ is a lung, and the contour of the thorax is defined by the contour of the lung.

16. The system of claim 9 , wherein the first organ is a lung and the at least one anatomical stage is an abdomen, and the step of applying a predefined auxology criteria to calculate the contour of the second organ includes estimating a contour of an abdomen dependent on the contour of the extremity of the exposed subject and a predefined dimension of the lung.

Assignees

• Gen Electric

Inventors

• Guntzer Pierre
• Roy Philippe
• Mertz Luc

Classifications

• G06V10/768

  using context analysis, e.g. recognition aided by known co-occurring patterns · CPC title

• G06V10/46

  Descriptors for shape, contour or point-related descriptors, e.g. scale invariant feature transform [SIFT] or bags of words [BoW]; Salient regional features (colour feature extraction G06V10/56) · CPC title

• G06T2207/30004

  Biomedical image processing · CPC title

• A61B6/488

  involving pre-scan acquisition · CPC title

• G06T7/0012

  Biomedical image inspection · CPC title