Methods for volumetric contouring with expert guidance

• US 7,817,836 B2
• Filed: 06/05/2006
• Issued: 10/19/2010
• Est. Priority Date: 06/05/2006
• Status: Active Grant

• Current Assignee: Varian Medical Systems Incorporated (Siemens AG)
• Original Assignee: Varian Medical Systems Incorporated (Siemens AG)
• Inventors: Chao, David, Chao, Nicholas, Chao, Hui-Min
• Primary Examiner(s): Ahmed; Samir A.
• Assistant Examiner(s): RASHIDIAN, MOHAMMAD M
• Application Number:
  US11/422,202
• Publication Number:
  US 20070280521A1
• Time in Patent Office: 1,597 Days
• Field of Search: 382/100, 382128-132, 128/916, 600/439, 600/443, 600/447, 600/462, 600/463, 600/471, 600/437, 600 1- 3, 600/425, 378/21, 378/65
• US Class Current: 382/131
• CPC Class Codes: G06V 10/248 by interactive preprocessing or interactive shape modelling, e.g. feature points assigned by a user
• CPC Class Codes: G06V 10/26 Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion
• CPC Class Codes: G06V 2201/03 Recognition of patterns in medical or anatomical images

Abstract

An efficient method and system of contouring target volumes and normal tissues at risk using an expert case as interactive tutorial reference for radiation therapy treatment plan is disclosed. Target volume contours based on guidance from a disease-matched expert case is selected by the user. The second imaging data set of a new patient is then displayed and linked with expert'"'"'s case in a the slice-by-slice and side-by-side fashion and at comparable field-of-view angles. Users can generate the target volume contours on the new patient using expert case as tutorial guidance or overlaying the expert contours onto the new patient'"'"'s imaging data set followed by reforming the target volume contours to fit the anatomical terrain of the patient. Users can then modify the target volume contours of their patient using expert case as tutorial guidance linked in a the slice-by-slice and side-by-side fashion and at comparable field-of-view angles.

Claims

1. A method for facilitating target volume contouring in conformal radiation therapy planning using interactive expert guidance, comprising

providing a first patient'"'"'s volumetric imaging data;

providing expert'"'"'s volumetric imaging data derived from a group of second patients with expert'"'"'s contours of the group of second patients having similar disease nature or clinical manifestation; and

contouring target volumes on first patient'"'"'s imaging set in a slice-by-slice step using expert'"'"'s guidance with the guidance derived from the second group of patients.

2. The method of claim 1 further comprising aligning said patient'"'"'s and expert'"'"'s volumetric imaging data sets at an user'"'"'s discretion using visual or computer-assisted methods.

3. The method of claim 1 further comprising displaying perspective images of said imaging data at field-of-view angles such that to allow a person to visualize target contours at the selected field-of-view angle.

4. The method claim 3, wherein the step of displaying perspective images is based on reforming said contoured target volume from expert case to fit the corresponding anatomical configuration of said patient'"'"'s imaging data.

5. The method claim 4, wherein said reformed target volume comprises aligning two imaging sets to an approximate orientation by user-controlled tools at axial, sagittal, or coronal view angles.

6. The method claim 5 further comprises reformation computation process.

7. The method of claim 1 further comprising linking two volumetric imaging data sets at comparable field-of-view angles.

8. The method of claim 7, wherein the step of linking two volumetric imaging data sets uses a computer program product.

9. The method of claim 7, wherein said comparable field-of-view angles include axial, sagittal, and coronal view angles.

10. The method claim 7, wherein the step of linking perspective images is based on reforming the target volume contours from said expert case to fit the corresponding anatomical configuration of said patient imaging data.

11. The method claim 10, wherein said reformed target volume comprises aligning two imaging sets to an approximate orientation by user-controlled tools at axial, sagittal, or coronal view angles.

12. The method claim 11 further comprises reformation computation process.

13. The method of claim 1, wherein said imaging data are data associated with computer tomography, magnetic resonance imaging, or positron emission tomography.

14. The method claim 1, wherein said expert guidance is achieved using a volumetric imaging data set containing tumor and normal tissue contours from a disease-matched expert case.

15. The method claim 1, wherein the step of contouring target volumes uses said expert'"'"'s guidance comprises contouring said patient'"'"'s imaging data set at user'"'"'s discretion without expert'"'"'s contour overlay.

16. The method claim 1, wherein the step of contouring target volumes comprises modifying contours after overlaying and reforming said expert'"'"'s contours onto said patient'"'"'s imaging data set.