Ultrasonic and CT/MR image fusion surgical navigation system and method based on optical localization rectification

An ultrasound imaging system and image fusion technology, applied in surgical navigation systems, surgery, medical science, etc., can solve the problems of soft tissue image drift, lack, and large positioning, and achieve the effect of reducing surgical navigation errors and accurate positioning.

Inactive Publication Date: 2018-03-30
SHANGHAI NINTH PEOPLES HOSPITAL SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the easy deformation of soft tissue, which causes intraoperative image drift, and the lack of real-time monitoring of its deformation, it is easy to cause large positioning errors during surgical navigation.

Method used

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  • Ultrasonic and CT/MR image fusion surgical navigation system and method based on optical localization rectification
  • Ultrasonic and CT/MR image fusion surgical navigation system and method based on optical localization rectification
  • Ultrasonic and CT/MR image fusion surgical navigation system and method based on optical localization rectification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A surgical navigation system based on fusion of ultrasound and CT / MR images based on optical positioning, such as figure 1 As shown, it is used for real-time monitoring of soft tissue deformation in craniomaxillofacial surgery. The fusion system includes an ultrasonic imaging system, a tracking and positioning system, and a computer workstation. The ultrasonic imaging system includes an ultrasonic probe and an image workstation. The tracking and positioning system Including an adapter fixed on the ultrasonic probe and a locator for obtaining the coordinates of the ultrasonic probe according to the marker, the computer workstation records its spatial position according to the real-time ultrasonic image obtained by the ultrasonic probe, performs three-dimensional reconstruction, and displays the fused image .

[0029] Further, the ultrasonic probe is a two-dimensional ultrasonic probe.

[0030] Further, the imaging workstation is a portable color Doppler ultrasound diagn...

Embodiment 2

[0035] Apply the image fusion surgical navigation system of the present invention to carry out the method for real-time ultrasound and CT / MR image fusion, such as figure 2 shown, including the following steps:

[0036] The ultrasonic imaging system, the tracking and positioning system and the computer workstation are connected by communication;

[0037] Selecting a coordinate origin to obtain the position coordinates of the ultrasonic probe;

[0038] Ultrasound scan imaging of the ultrasound scan site;

[0039] Recording the spatial position information of the two-dimensional fan-shaped ultrasonic image according to the obtained position coordinates of the ultrasonic probe;

[0040] Performing three-dimensional reconstruction on the two-dimensional ultrasound image in the computer workstation;

[0041] The three-dimensional ultrasound image is registered and fused with the CT / MR image imported into the computer workstation, image 3An ultrasound and CT fusion image obtain...

Embodiment 3

[0043] In order to verify the feasibility of the above method and system, CT and free-style ultrasound scanning with optical positioning were performed on patients with facial foreign bodies and parotid gland tumors. The connected and integrated system was running normally under the joint on-site monitoring of oral and maxillofacial surgeons, sonographers, and engineers, and successfully obtained ultrasound images of the lesion area according to the image acquisition standards of the engineers.

[0044] Fusion image analysis:

[0045] In order to test the effect of image fusion, we imported the fused ultrasound and CT data into the image processing software MIPAV again, and superimposed the ultrasound and CT data. Then the effect of image fusion is analyzed through subjective and objective evaluation methods.

[0046] The subjective evaluation method is that two experienced sonographers and radiologists jointly review the original image and the fused image, and evaluate the f...

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Abstract

The invention provides an ultrasonic and CT / MR image fusion surgical navigation system and method based on optical localization rectification. The system comprises an ultrasonic imaging system, a tracking and locating system and a computer workstation. The ultrasonic imaging system comprises an ultrasonic probe and an image workstation. The tracking and locating system comprises an adapter fixed to the ultrasonic probe and a locater for obtaining the coordinates of the ultrasonic prone according to a marker. The computer workstation records the space position for three-dimensional reconstruction according to a real-time ultrasonic image obtained by the ultrasonic probe and displays a fused image. In combination with an optical localization system, the fusion of ultrasonic and CT / MR image is realized, the system can be applied for monitoring soft tissue deformation in real time in craniomaxillofacial surgery, precise surgery localization is realized, and surgery navigation errors are reduced.

Description

technical field [0001] The invention belongs to the technical field of ultrasound imaging, and in particular relates to an operation navigation system and a method thereof for fusion of ultrasound and CT / MR images based on optical positioning and registration. Background technique [0002] In the computer-aided surgical navigation system, including path planning, physical coordinate system registration, intraoperative navigation, etc., are all based on the reconstruction of preoperative image data. During the operation, the deformation of viscera and soft tissue may be caused by breathing, contact with surgical instruments, etc., so that the observed image data cannot reflect the real position of the patient's internal anatomical structure, resulting in a decrease in the positioning accuracy of soft tissue navigation surgery. However, ultrasound has been introduced as a real-time intraoperative visualization technique due to its advantages of cheapness, real-time, non-invasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B34/20
CPCA61B34/20A61B2034/2055A61B2034/2063A61B2034/2065
Inventor 张诗雷杨成帅宋志坚吴锦阳张勇唐智贤张楚茜
Owner SHANGHAI NINTH PEOPLES HOSPITAL SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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