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Multi-modality image registration method and operation navigation method based on multi-modality image registration

A multi-modal image and surgical navigation technology, applied in the field of surgical navigation and multi-modal image registration

Active Publication Date: 2012-07-18
NANTONG KANGSHENG MEDICAL EQUIP
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Problems solved by technology

At present, there is no imaging technology that can comprehensively obtain human organ information, and quickly and accurately register images of various organ information

Method used

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  • Multi-modality image registration method and operation navigation method based on multi-modality image registration
  • Multi-modality image registration method and operation navigation method based on multi-modality image registration
  • Multi-modality image registration method and operation navigation method based on multi-modality image registration

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Embodiment Construction

[0046] Because multimodal images are taken from different imaging devices and images at different shooting times. Therefore, the reference image, that is, the target image in the preoperative planning system, is not the same as the image to be registered, that is, the intraoperative image. For example, the two images are not on the same layer, or the two images may be deformed or shifted in position, so timely correction is required. . Therefore, the present invention adopts the following multimodal image registration method.

[0047] like figure 1 As shown, it is a flow chart of a multimodal image registration method, including the following steps:

[0048] Step S110: Sampling the reference image and the image to be registered according to a first sampling ratio to obtain the reference image and the image to be registered with a first resolution.

[0049] In this embodiment, the step of sampling the reference image and the image to be registered according to the sampling r...

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Abstract

A multi-modality image registration method includes the following steps: sampling reference images and images to be registered according to a first sampling proportion to obtain the reference images and the images to be registered with first resolution ratio, adopting a B spline surface as a deformation model to perform matching on the reference images and the images to be registered, calculating matching measure and obtaining first matching parameters, and increasing sampling proportion to repeat the processes until the matching measure reaches a reset threshold value, wherein in matching, matching parameters of last time are used as initial matching parameters after each-time sampling proportion is increased. An operation navigation method based on multi-modality image registration is further provided.

Description

【Technical field】 [0001] The invention relates to image processing, in particular to a multimodal image registration method and a surgical navigation method based on the multimodal image registration. 【Background technique】 [0002] In the prior art, domestic interventional navigation systems are mainly aimed at skeletal and brain surgery, as well as registration based on ultrasound images. Due to the rigidity of the bone, the registration between the preoperative image and the patient is relatively easy to complete the rigid registration through the landmark points on the bone, and a better treatment accuracy can also be achieved. However, for the surgical operation of soft tissues such as the liver, the displacement and deformation of the liver will inevitably be caused by the action of breathing or surgical instruments. At this point, the rigid registration based on feature points is no longer applicable. In addition, the general ultrasound image has high noise and uncl...

Claims

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Application Information

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IPC IPC(8): G06K9/62A61B19/00A61B34/20
Inventor 谢小辉林永楷孙强马翠杜如虚
Owner NANTONG KANGSHENG MEDICAL EQUIP
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