ABLATION PLANNING WITH LESION COVERAGE FEEDBACK

• US 20140228835A1
• Filed: 09/10/2012
• Published: 08/14/2014
• Est. Priority Date: 09/13/2011
• Status: Active Grant

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips N.V.
• Inventors: Mielekamp, Peter Maria, Radaelli, Alessandro Guido, Noordhoek, Niels Jan
• Granted Patent: US 9,839,482 B2
• Time in Patent Office: Days
• US Class Current: 606/34
• CPC Class Codes: A61B 18/1477 Needle-like probes
• CPC Class Codes: A61B 18/1815 using microwaves
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/0293 using an instrument interstitially inserted into the body, e.g. needle
• CPC Class Codes: A61B 2018/1425 Needle
• CPC Class Codes: A61B 2018/1869 with an instrument interstitially inserted into the body, e.g. needles
• CPC Class Codes: A61B 2034/104 Modelling the effect of the tool, e.g. the effect of an implanted prosthesis or for predicting the effect of ablation or burring
• CPC Class Codes: A61B 2034/107 Visualisation of planned trajectories or target regions
• CPC Class Codes: A61B 2034/252 indicating steps of a surgical procedure
• CPC Class Codes: A61B 2034/258 providing specific settings for specific users
• CPC Class Codes: A61B 2090/374 NMR or MRI
• CPC Class Codes: A61B 2090/376 using X-rays, e.g. fluoroscopy
• CPC Class Codes: A61B 2218/00 Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
• CPC Class Codes: A61B 34/10 Computer-aided planning, simulation or modelling of surgical operations
• CPC Class Codes: A61B 34/25 User interfaces for surgical systems
• CPC Class Codes: G06T 19/20 Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts

Abstract

The present invention relates to tumour targeting ablation planning. As a facilitated and improved image-based planning method, a method (100) for tumour targeting ablation planning is provided: At least one segmented tumour in a 3D data set (112) to be treated in an ablation procedure is provided (110). A contour (116) of the segmented tumour is generated and displayed (114). A predetermined ablation profile (120) to overlap with at least a part of the at least one segmented tumour is provided and displayed (118). An overlapping region (124) is identified (122) and a predetermined safety factor (128) is applied (126) to at least a part of the overlapping region to generate (130) a modified overlapping region (132). Parts of the overlapping region arranged outside the modified overlapping region are then determined (134) as critical overlapping portions (136). The critical overlapping portions are displayed (138) in relation with the contour and the ablation profile as virtual planning ablation result (140).

Claims

1. A planning device for tumour targeting ablation planning, comprising;

a processing unit;

an interface unit; and

a display unit;

wherein the interface unit is configured to provide at least one segmented tumour in a 3D data set to be treated in an ablation procedure; and

to provide a predetermined ablation profile;

wherein the processing unit is configured to generate a contour of the segmented tumour;

to overlap the predetermined ablation profile with at least a part of the at least one segmented tumour;

to identify an overlapping region;

to apply a predetermined safety factor at least to a part of the overlapping region to generate a modified overlapping region; and

to determine parts of the overlapping region that are arranged outside the modified overlapping region as critical overlapping portions; and

wherein the display unit is configured to display the contour of the segmented tumour;

to display the predetermined ablation profile overlapped with at least a part of the at least one segmented tumour; and

to display the critical overlapping portions in relation with the contour and the ablation profile as virtual planning ablation result.

2. Device according to claim 1, wherein the interface unit is configured for adjusting the predetermined ablation profile by the user in its size, shape and/or location;

and

wherein the processing unit is configured to repeat the identification of an overlapping region;

the application of a predetermined safety factor to generate an updated modified overlapping region; and

the determination of parts of the overlapping region that are arranged outside the modified overlapping region as critical overlapping portions; and

wherein the display unit is configured to provide updated ablation planning information.

3. Device according to claim 1, wherein the processing unit is configured to add a predetermined first safety margin to the at least one segmented tumour to generate a dilated contour of the tumour;

and to determine the parts of the dilated contour arranged outside the ablation profile as critical dilated contour portions;

wherein the display unit is configured to display the dilated contour; and

to indicate the critical dilated contour portions.

4. Device according to claim 1, wherein the processing unit is configured to subtract a predetermined second safety margin from the predetermined ablation profile to generate a limited planned ablation profile;

and to determine the parts of the contour arranged outside the planned ablation profile as critical contour portions; and

wherein the display unit is configured to display the planned ablation profile; and

to indicate the critical contour portions.

5. A medical system for tumour targeting ablation, comprising:

an image acquisition unit;

a planning device according to one of the preceding claims; and

an ablation unit;

wherein the image acquisition unit is configured to provide the 3D data set from which the tumour is segmented; and

wherein the planning device is configured to provide an ablation path; and

wherein the ablation unit is configured to apply the ablation procedure to the tumour.

6. Medical system according to claim 5, wherein the image acquisition unit is an X-ray imaging device.

11. Method according to claim 1, wherein the segmented tumour is displayed in an overlaid manner together with image data of a surrounding region.

12. Method according to claim 1, wherein a planned insertion path of an ablation target for the tumour targeting ablation is shown.

14. Computer program element for controlling an apparatus according to claim 1.

15. Computer readable medium having stored the program element of claim 14.

7. A method for tumour targeting ablation planning, comprising the following steps:

a) providing at least one segmented tumour in a 3D data set to be treated in an ablation procedure;

b) generating and displaying a contour of the segmented tumour;

c) providing and displaying a predetermined ablation profile to overlap with at least a part of the at least one segmented tumour;

d) identifying an overlapping region;

e) applying a predetermined safety factor to at least a part of the overlapping region to generate a modified overlapping region;

wherein parts of the overlapping region arranged outside the modified overlapping region are determined as critical overlapping portions; and

f) displaying the critical overlapping portions in relation with the contour and the ablation profile as virtual planning ablation result.

8. Method according to claim 7, wherein the predetermined ablation profile is adjustable by the user in its size, shape and/or location;

and wherein the steps d) to f) are repeated to provide updated information.

9. Method according to claim 7, wherein step e) comprises:

adding a predetermined first safety margin to the at least one segmented tumour to generate a dilated contour of the tumour;

displaying the dilated contour;

determining the parts of the dilated contour arranged outside the ablation profile as critical dilated contour portions; and

wherein in step f), the critical dilated contour portions are indicated in the display.

10. Method according to claim 7, wherein step e) comprises:

subtracting a predetermined second safety margin from the predetermined ablation profile to generate a limited planned ablation profile;

displaying the planned ablation profile;

determining the parts of the contour arranged outside the planned ablation profile as critical contour portions; and

wherein in step f), the critical contour portions are indicated in the display.

13. Method according to claims 9, wherein the indication of critical dilated contour portions and/or critical contour portions comprises displaying the portions in a different graphical manner than the other portions.