Target detection device based on exponential photon density dynamic adjustment

A target detection, exponential technology, applied in the direction of electrical digital data processing, diagnostic recording/measurement, special data processing applications, etc., can solve the problems of insensitivity of deep tissue structure, poor deep resolution, etc.

Inactive Publication Date: 2009-09-30
INST OF AUTOMATION CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide an exponential photon density dynamic adjustment target detection device to solve the problem that the existing near-infrared imaging equipment is not sensitive to the deep tissue structure and the deep resolution is poor

Method used

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  • Target detection device based on exponential photon density dynamic adjustment
  • Target detection device based on exponential photon density dynamic adjustment
  • Target detection device based on exponential photon density dynamic adjustment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Figure 8 Shown is an image of an exponentially adjusted deep tissue containing a tumor. image 3 Shown is a real image of a tumor deep within the tissue, where the target is 6 mm in diameter and the tumor is 3.8 cm below the tissue.

[0082] Compared image 3 ,As can be seen, Figure 8 , the accuracy of tumor location is very high, with very good imaging results.

[0083] In this example, the adjustment index a=2.5 in the adjustment weight M, and the dynamic range of the adjustment parameter R=129470.

Embodiment 2

[0085] Figure 8 Shown is the superficial layer of tissue containing a 6 mm diameter tumor with the tumor located 1.2 cm below the tissue. Figure 10 It is the imaging effect diagram of the exponential adjustment target detection device of the present invention.

[0086] It can be seen that the exponentially adjusted target detection device also has a very ideal imaging effect on tumors in the superficial tissue.

[0087] In this example, the adjustment index a=1, and the dynamic range of the adjustment parameter R=111.

Embodiment 3

[0089] Figure 11 Shown is a real image of tissue containing multiple tumors. And these tumors had different depths, 1 cm, 2 cm, and 3 cm below the tissue, respectively. Each tumor was 8 mm in size. Figure 12 Imaging renderings of the prior art. Figure 13 It is the imaging effect diagram of the exponential adjustment target detection device of the present invention.

[0090] It can be seen from the imaging effect that the existing near-infrared imaging equipment cannot detect tumors deep in the tissue; however, in the exponentially adjusted target detection device of the present invention, three tumors can be accurately detected; and it has a position error comparison Small, the overall imaging effect is good. This shows that the exponentially adjusted target detection device also has a good detection ability for multiple tumors of different depths.

[0091] In this example, the adjustment index a=1.8, and the dynamic range of the adjustment parameter R=4795.

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Abstract

The invention relates to a target detection device based on photon density exponential adjustment. The device can be used for near infrared no-wound detection for tumor in human tissue. The device mainly solves the problems that the former near infrared imaging device is not sensitive to the deep structure and the detection result is poor. The invention performs adjustment according to the imaging depth, and the regulation curve is of an exponential type; and the ratio between the maximum value and the minimum value on the regulation curve is called as the dynamic range of weighting adjusting. When the image approaches to the surface of the detected target, the photon density is multiplied by the adjusted weighting with a smaller dynamic range; and when the image is far from the surface of the detected target, the photon density is multiplied by the adjusted weighting with a wider dynamic range. During the adjusting process, the larger value of the weighting adjustment is acted on the photon density on the deep layer; and the smaller value of the weighting adjustment is acted on the photon density on the shallow layer. The exponential adjustment method with different dynamic ranges can effectively detect the targets with different depths.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to target detection equipment for near-infrared spectral imaging. Background technique [0002] Near-infrared spectral imaging is a non-invasive imaging technology developed in the 1970s. It has attracted extensive attention from researchers for its non-invasive, portable, real-time and low-cost characteristics, and has developed rapidly in the last three decades. [0003] Biological tissue is a strong scattering medium. When near-infrared light is transmitted in biological tissue, water, oxyhemoglobin and deoxyhemoglobin, which are the main components in the tissue, have low absorption and high scattering characteristics for near-infrared light. Therefore, near-infrared Light can travel several centimeters in biological tissue, constituting a "photomedical window" that detects activity within the tissue. The absorption curves of water, oxyhemoglobin and deoxyhemoglobin ...

Claims

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Application Information

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IPC IPC(8): A61B5/00G06F17/00
Inventor 蒋田仔牛海晶吉利军
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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