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Real-time quality control of em calibrations

An image and volume technology, applied in diagnostic recording/measurement, details involving 3D image data, image data processing, etc., can solve problems such as incorrect motion estimation of ultrasound volume, incorrect guidance of surgical tools, etc.

Active Publication Date: 2016-08-17
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, incorrect calibration can lead to incorrect motion estimation of the ultrasound volume and thus incorrect guidance of surgical tools

Method used

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  • Real-time quality control of em calibrations
  • Real-time quality control of em calibrations
  • Real-time quality control of em calibrations

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0019] As previously stated, the present invention provides a motion-based approach to verify the relationship between image volumes acquired from a probe (eg, a 3D TEE probe) and a position sensor (eg, an EM position sensor) attached to the probe. the calibration matrix. As those skilled in the art can through the following Figure 1-9 As can be appreciated from the description, image volume motion is measured from two sources: (a) image motion of the image volume, and (b) tracking motion of the image volume.

[0020] figure 1 An image-guided system employing an imaging system, a tracking system and a registration device 40 is illustrated.

[0021] For purposes of the present invention, the imaging system is broadly defined herein to include a probe 20 structurally configured to generate an image volume of an anatomical object (eg, heart 10 ) within a coordinate system and an Any system into the imaging device 21 that processes the image volume. Examples of the imaging sy...

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Abstract

The probe (20) generates a plurality of image volumes (13i, 13j) of the anatomical object (10) within the coordinate system (11), and the imaging device (21) generates image volumes (13i, 13j) representing said anatomical object (10). ) of the imaging data (22). A position sensor (30) is attached to the probe (20), and a tracking device (31) generates tracking data (22) representing tracking of the position sensor (30) within the coordinate system (11). A registration device (40) performs a verification test of a calibration matrix (51) associated with a spatial relationship between said image volumes (13i, 13j) and said position sensor (30). The verification test includes testing the absolute difference between image-based volumetric motion (VMIB) and tracking-based volumetric motion (VMTB) relative to a calibration threshold (CT).

Description

technical field [0001] The present invention generally relates to electromagnetic ("EM") tracking of a 3D transesophageal echo ("TEE") probe. The invention particularly relates to real-time quality control of TEE probes during minimally invasive interventions. Background technique [0002] 3D TEE probes are being integrated into daily clinical practice for minimally invasive cardiac treatments, and EM tracking of in vivo 3D TEE probes facilitates in vivo beating heart surgery and therapy procedures. EM tracking of a 3DTEE probe requires accurate calibration between the 3D TEE probe and the EM position sensor, and includes finding out the rigid space between a voxel in an ultrasound ("US") image and the EM position sensor attached to the 3D TEE probe relation. Accurate calibration and rigid spatial relationships allow (a) to estimate the motion of the 3D TEE probe as it moves within the patient, (b) to map any TEE volume to a common world coordinate system at any time (e.g....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/06A61B1/00G06T7/00
CPCA61B5/064A61B5/065A61B5/1113A61B8/4254A61B8/5261A61B2017/00243A61B2017/00725G06T7/20G06T2200/04G06T2207/10136G06T2207/30048A61B8/4245A61B34/20A61B2034/2051A61B2090/378A61B8/12G06T7/70
Inventor A·K·贾殷
Owner KONINK PHILIPS ELECTRONICS NV