Visualization of projection x-ray image

Patent metadata

Field	Value
Publication number	US-2018182097-A1
Application number	US-201815884668-A
Country	US
Kind code	A1
Filing date	Jan 31, 2018
Priority date	Sep 29, 2015
Publication date	Jun 28, 2018
Grant date	—

Abstract

A system and method are provided for obtaining an improved visualization of bone objects comprised in a projection X-ray image. The projection X-ray image comprises bone objects which at least in part overlap. According to the system and method, a number of the bone objects are delineated by a contour, thereby obtaining a number of delineated bone objects. For each of the number of delineated bone object, a bone suppression technique is applied to the image to obtain respective bone image data individually showing the respective delineated bone object while suppressing shadows of obstructing objects. The bone image data generated for each of the number of delineated bone objects is used to generate an output image in which the bone objects do not overlap. An advantage of the system and method is that a non-overlapping, shadow-suppressed, presentation of the bone objects may be created from an X-ray image which was obtained by projectional radiography.

First claim

1 . A system for processing a two-dimensional X-ray image comprising bone objects which at least in part overlap, the system comprising:
an input interface for accessing the X-ray image; a processor for processing the X-ray image by: i) delineating a number of the bone objects by a contour, thereby obtaining a number of delineated bone objects; ii) for each of the number of delineated bone object, applying a bone suppression technique to the image to obtain respective bone image data individually showing the respective delineated bone object while suppressing shadows of obstructing objects; and iii) using the bone image data generated for each of the number of delineated bone objects to generate an output image in which the bone objects do not overlap.

2 . The system according to claim 1 , wherein the processor is configured for, before generating the output image, applying a geometric transformation to the bone image data of each bone object to geometrically transform the respective bone object.

3 . The system according to claim 2 , wherein the geometric transformation is configured to reduce a curvature of the respective bone object.

4 . The system according to claim 3 , wherein said delineating by a contour provides a centerline of the respective bone object, and wherein the geometric transformation is configured to straighten the centerline.

5 . The system according to claim 1 , wherein the processor is configured for generating the output image based on composition data, the composition data defining a relative positioning of the number of delineated bone objects in the output image.

6 . The system according to claim 5 , wherein the composition data defines a tiling of the number of delineated bone objects which reduces non-bone space between the number of delineated bone objects while preserving their relative anatomical positioning.

7 . The system according to claim 1 , further comprising a display output for outputting the output image to a display, wherein the display output is further configured for outputting the X-ray image simultaneously with the output image.

8 . The system according to claim 7 , further comprising a user interaction subsystem comprising a user input interface and the display output, wherein the user interaction subsystem is configured for:
enabling the user to interactively position a display marker in a first one of a group of: the X-ray image and the output image, and displaying a corresponding display marker in a second one of the group.

9 . The system according to claim 7 , wherein the user interaction subsystem is configured for establishing a position of the corresponding display marker based on the geometric transformation of each respective bone object.

10 . The system according to claim 1 , wherein:
the input interface is further configured for accessing a reference contour and bone image data of a reference bone object; and the processor is further configured for: i) determining a correspondence between the bone image data of the reference bone object and the bone image data of at least one of the number of delineated bone objects based on a mapping of their respective contours; and ii) comparing the bone image data of the reference bone object and the bone image data of said delineated bone object to detect a pathological finding.

11 . The system according to claim 10 , wherein the processor is configured for detecting the pathologic finding by:
determining a range of acceptable intensity deviations between the bone image data of the reference bone object and the bone image data of said delineated bone object; indicating deviations greater than the acceptable intensity deviations.

12 . The system according to claim 10 , wherein the processor is configured for mapping the contour and the reference contour to a common coordinate system using a centerline of each of said contours.

13 . A workstation or imaging apparatus comprising the system according to claim 1 .

14 . A method for processing a two-dimensional X-ray image comprising bone objects which at least in part overlap, the method comprising:
accessing the X-ray image; processing the X-ray image by: i) delineating a number of the bone objects by a contour, thereby obtaining a number of delineated bone objects; ii) for each of the number of delineated bone object, applying a bone suppression technique to the image to obtain respective bone image data individually showing the respective delineated bone object while suppressing shadows of obstructing objects; and iii) using the bone image data generated for each of the number of delineated bone objects to generate an output image in which the bone objects do not overlap.

15 . A computer program product comprising instructions for causing a processor system to perform the method according to claim 14 .

Assignees

• Koninklijke Philips Nv

Inventors

• Von Berg Jens
• Young Stewart
• Adhikarath Valappil Prasad

Classifications

• G06T2207/20092

  Interactive image processing based on input by user · CPC title

• A61B6/5252

  removing objects from field of view, e.g. removing patient table from a CT image · CPC title

• A61B6/5205

  involving processing of raw data to produce diagnostic data · CPC title

• G06T2207/10116

  X-ray image · CPC title

• A61B6/461

  Displaying means of special interest · CPC title