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Device-less 4 dimensional-computed tomography (D4D-CT) imaging method, device and system

A D4D-CT and imaging technology, applied in computerized tomography scanners, echo tomography, etc., can solve problems such as amplitude noise, failure to obtain breathing curves, and selection errors, so as to improve image quality and overcome artifacts Effect

Active Publication Date: 2013-05-08
GE MEDICAL SYST GLOBAL TECH CO LLC
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Problems solved by technology

However, the amplitude of internal features extracted from CT slices is generally noisy and unstable, and simple smoothing cannot obtain the expected respiratory curve
like figure 1 As shown, the respiratory curve obtained from the above four internal features deviates from the reference respiratory curve to varying degrees, and the use of such a respiratory curve will inevitably lead to selection errors, resulting in image distortion in D4D-CT imaging

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  • Device-less 4 dimensional-computed tomography (D4D-CT) imaging method, device and system

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[0038] As mentioned above, Ruijiang Li et al. proposed a D4D-CT sorting method in the article "4D CT sorting based on patient internal anatomy". The method uses a spatial correlation measure to select the optimal internal feature for each bed from four internal features (body area, lung area, air content, and lung density) to generate respiration curves to select acquired CT slices for D4D-CT imaging. This paper is hereby incorporated by reference in its entirety.

[0039] However, a large number of clinical studies have shown that when the CT slice selection method proposed by Li et al. is applied to the CT slice selection of the patient's heart region, there is a large difference between the generated breathing curve and the reference breathing curve. figure 1 , the left view shows the respiratory signal curve generated from the four internal features proposed by Li et al., namely, body area, lung area, air content, and lung density, and the right view shows the Baseline ...

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Abstract

Discloses are an improved device-less 4 dimensional-computed tomography (D4D-CT) imaging method, device and system. The method comprises the steps of determining lung zoom values on collected CT slices of a patient's lug area; generating a respiration curve of the patient according to the lung zoom values; and selecting the collected CT slices on the basis of the generated respiration curve so as to be used for D4D-CT imaging. Under the conditions that an external respiration monitoring device is not needed, the appropriate CT slices can be selected to be used for D4D-CT imaging, so that artifacts caused by the respiration curve of the patient in prior art of D4D-CT are removed, and quality of D4D-CT images is improved.

Description

technical field [0001] The present invention relates to the field of CT imaging, in particular to an improved device-less four-dimensional CT (D4D-CT: Device-less 4 dimensional CT) imaging method, device and system. Background technique [0002] In order to eliminate or reduce the influence of artifacts caused by respiratory movement on CT scans of thoracic and abdominal organs, and to reflect the change of thoracic and abdominal tumors over time, and to achieve accurate diagnosis and treatment, the concept of four-dimensional CT (4D-CT) was proposed. , incorporating the time factor into the three-dimensional reconstruction of CT scanning images, a dynamic four-dimensional CT image can be formed, that is, 4D-CT. [0003] At present, the general process of realizing 4D-CT of the chest and abdomen on a CT machine is as follows: during image acquisition, a respiratory monitoring system connected to the CT machine is used to monitor the respiratory movement of the patient, and t...

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Application Information

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IPC IPC(8): A61B6/03
Inventor 刘平董加勤
Owner GE MEDICAL SYST GLOBAL TECH CO LLC
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