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A method and system of segmenting CT scan data

A CT scanning and data technology, applied in image data processing, image data processing, computed tomography scanners, etc., can solve problems such as lack of anatomical models, difficulty in image segmentation, and image complexity

Inactive Publication Date: 2011-04-13
AGENCY FOR SCI TECH & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, segmentation of medical images is a challenging task due to the complexity of the images and the lack of anatomical models that can adequately capture possible deformations in each structural tissue.
The relatively low signal-to-noise ratio and the inherent artifacts often present in medical images make image segmentation more difficult
Even though many segmentation algorithms have been proposed at present, based on the above reasons, most of the proposed algorithms have limited application effect and cannot achieve the effect proposed by researchers themselves.

Method used

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  • A method and system of segmenting CT scan data
  • A method and system of segmenting CT scan data
  • A method and system of segmenting CT scan data

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Embodiment Construction

[0035] Method 100: Not near the posterior fossa slice The first example of the head removal method.

[0036] refer to figure 1 , as a first embodiment of the present invention, the steps of method 100 are shown. The method removes portions of the CT scan data of the skull corresponding to slices of the CT scan volume.

[0037] The input to method 100 is a plurality of slices (eg, CT scan images) of a CT scan volume. In one example, each CT scan image is in Digital Imaging in Medicine (DICOM) format. A series of steps 102 to 110 are then performed for each slice. Alternatively, steps 102 to 110 may be performed directly on the CT scan volume.

[0038] In method 100, steps 102 to 110 are performed only for slices that are not in the vicinity of the posterior fossa. In this specification, slices near the posterior fossa are defined as the two to three slices closest to the posterior fossa.

[0039] In one example, a CT scan is assumed to be taken from the posterior foss...

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Abstract

A method of segmenting CT scan data comprises transforming intensity data into transformed data values. In a first option, the method includes convolving the CT scan data with a mask to obtain energy data wherein the mask has band pass filter characteristics, generating a histogram of the energy data and segmenting the CT scan data based on energy values in the generated histogram. In a second option, the method includes transforming the intensity data into Hounsfield scale data, and segmenting the image based on predefined Hounsfield scale values.

Description

technical field [0001] The present invention relates to methods and systems for segmenting CT scan data. The method and system can be used to remove skull regions in CT scan data, identify hemorrhagic slices, and segment hemorrhagic regions in hemorrhagic slices. Background technique [0002] Stroke is one of the leading causes of mortality and morbidity in many countries. Timely diagnostic evaluation and treatment can help stroke patients regain some of the neurological function lost during the stroke. [0003] Computerized tomography (CT) plays an important role in the diagnosis of stroke. CT provides good contrast between a patient's tissue and bone, and between tissue and blood. Also, CT is very useful in most hospitals as well as emergency services. CT can also be used to distinguish ischemic strokes from hemorrhagic strokes, which are defined as accumulations of blood inside the skull. There are many different types of bleeding, some of which are listed below: int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00A61B6/03G06K9/00
CPCG06T7/0081G06T5/20G06T5/40G06T7/0091G06T2207/20148G06T2207/30016G06T2207/10081G06T7/0012G06T7/11G06T7/136G06T7/155
Inventor 巴哈努·K·N··帕卡什威斯洛·卢克简·诺温斯基
Owner AGENCY FOR SCI TECH & RES