Intracranial hemorrhage detection experiment device

Abstract

The utility model discloses an intracranial hemorrhage detection experimental device, which comprises a suspension unit, a laser emission unit, a phantom placement unit and a photoelectric detection unit, adopts a multilayer mixed craniocerebral phantom, and solves the problems that a solid phantom cannot simulate the dynamic change of the craniocerebral and a liquid phantom cannot reflect the multilayer structure of the craniocerebral. The detection accuracy is demonstrated by using a phantom experiment, and the method can be repeated and reproduced. The device can be flexibly adjusted, and the simulation requirements of different crowds are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of intracranial hemorrhage detection, and in particular relates to an intracranial hemorrhage detection experimental device. Background Art

[0002] Near-infrared spectroscopy for detecting intracranial hemorrhage is simple to operate, and the equipment is portable, which can meet the needs of detecting intracranial hemorrhage in emergency situations. The use of near-infrared spectroscopy to detect intracranial hemorrhage has always been a research focus of scientific researchers. Common solid models and liquid models have their limitations. Solid models are strong, portable, and durable, and can simulate lesions in different locations, but solid models are "fixed" and cannot be changed to determine the effects of dynamic changes or disturbances in different layers, such as changes in hemoglobin or melanin content. Liquid models provide effective dynamic changes in tissue media, but they are still mainly designed as a single layer, built into a container, and cannot simulate multi-layer tissue media. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an experimental device for detecting intracranial hemorrhage. The optical model of the brain adopted is a solid-liquid hybrid model. A multi-layer solid model is used to simulate the scalp layer and skull layer of the brain, and a liquid model is used to simulate the dynamic changes in the gray matter and white matter of the brain, so as to more accurately simulate the optical properties of the brain.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An intracranial hemorrhage detection experimental device comprises a laser emitting unit, a suspension unit, a phantom placement unit, and a photoelectric detection unit; the laser emitting unit and the photoelectric detection unit are in the same plane and are placed vertically on the front of the phantom placement unit; the laser emitting unit emits near-infrared light, and the photoelectric detection unit detects the intensity of the near-infrared light transmitted through the solid-liquid mixed phantom; the suspension unit comprises a suspension beam, a sample suspension box, and a slide rail, a fixed volume of fresh sheep blood is set in the sample suspension box, the suspension beam suspends the sample suspension box through the slide rail, the fresh sheep blood simulates human brain hemorrhage, the suspension beam is placed on the slide rail and can slide freely to simulate bleeding in different positions of the human brain; the phantom placement unit is a cubic container composed of acrylic thin plates, and the solid-liquid mixed phantom is placed inside the phantom placement unit; the photoelectric detection unit comprises an optical fiber, an avalanche photodiode, and an acquisition card, the near-infrared light transmitted through the solid-liquid mixed phantom enters the avalanche photodiode through the optical fiber to generate a signal, and the acquisition card performs acquisition calculations to obtain the result.

[0006] Furthermore, the acrylic sheet is slotted with a scale of 0.1 cm. The acrylic sheet can be moved according to the slot position to adjust the thickness of the solid-liquid hybrid phantom to simulate the brain structure of different people.

[0007] Furthermore, the laser emitting unit is a multi-wavelength beam combining laser, which includes 8 wavelengths. The multiple wavelengths can be coupled into a single-mode optical fiber for output, or can be adjusted to a single wavelength for output.

[0008] Furthermore, the distance between the laser emitting unit and the photoelectric detection unit is variable to detect bleeding at different depths.

[0009] Furthermore, the laser emitting unit uses a multi-wavelength beam combining laser with a rated power of 500 milliwatts.

[0010] Furthermore, the sample hanging box is made of transparent polyethylene and is connected to the hanging beam.

[0011] Furthermore, the solid-liquid hybrid phantom includes a multi-layer solid model and a liquid model. The multi-layer solid model simulates the scalp layer and skull layer of the brain, and the liquid model is placed inside the multi-layer solid model to simulate the dynamic changes in the gray matter and white matter of the brain.

[0012] Beneficial effects:

[0013] The phantom proposed in this utility model realistically simulates the human scalp, skull, cerebrospinal fluid, and brain layers, along with their corresponding optical properties and thicknesses. This newly designed multi-layered hybrid solid and liquid model is constructed using a combination of silicone, TiO2, and dye. A suspension device suspends blood at various locations on the phantom to simulate lesions in various locations, allowing for more comprehensive data collection and verifying the feasibility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the suspension unit;

[0015] Figure 2 This is a schematic diagram of an experimental device for detecting intracranial hemorrhage according to the present invention;

[0016] Figure 3 Schematic diagram of the solid-liquid hybrid phantom.

[0017] Among them, the figures are marked as follows: 1 is a suspension beam, 2 is a sample suspension box, 3 is a solid-liquid mixed phantom, 4 is a laser light inlet, 5 is a detection light outlet, 6 is a liquid layer, 7 is a skull layer, 8 is a scalp layer, and 9 is a slide rail. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0019] like Figure 1-Figure 2 As shown, an intracranial hemorrhage detection experimental device of the present invention includes a laser emission unit, a suspension unit, a phantom placement unit, and a photoelectric detection unit.

[0020] The laser emitting unit and the photoelectric detection unit are in the same plane and are placed vertically in front of the phantom placement unit. The laser emitting unit emits near-infrared light, and the photoelectric detection unit detects the intensity of the near-infrared light transmitted through the solid-liquid mixed phantom 3.

[0021] Preferably, the distance between the laser emitting unit and the photoelectric detection unit is variable to detect bleeding at different depths.

[0022] Preferably, the laser emitting unit is a multi-wavelength beam combining laser, which includes 8 wavelengths. It can couple multiple wavelengths into a single-mode optical fiber for output, or adjust to a single wavelength for output. For example, the laser emitting unit includes a near-infrared light source with a wavelength of 808nm and an energy of 5mw.

[0023] The suspension unit includes a suspension beam 1, a slide rail 9, and a sample suspension box 2. The suspension beam 1 is used to suspend the sample suspension box 2. Fresh sheep blood is placed in the sample suspension box 2 to simulate human brain hemorrhage. The suspension beam 1 is placed on the slide rail 9 and can slide freely to simulate bleeding in different parts of the human brain.

[0024] The phantom placement unit is a cubic container (10 cm × 10 cm × 10 cm) composed of acrylic sheets. The solid-liquid hybrid phantom 3 is placed within this unit. Preferably, the laser light inlet 4 and the detection light outlet 5 are mounted side by side on a single acrylic sheet. Vertical grooves with 0.1 cm graduations are defined on two opposing acrylic sheets. The acrylic sheet without the laser light inlet 4 and detection light outlet 5 is moved along the vertical groove to adjust the thickness of the solid-liquid hybrid phantom 3 and simulate the brain structure of different people. The solid-liquid hybrid phantom 3 simulates brain structure, and sheep blood simulates brain bleeding.

[0025] The photoelectric detection unit includes an optical fiber, an avalanche photodiode, and an acquisition card. Near-infrared light transmitted through the solid-liquid hybrid phantom 3 enters the avalanche photodiode via the optical fiber, generating a signal. The acquisition card then collects and calculates the signal to produce the result. The photoelectric detection unit is a commercially available component, and its specific structure and composition are well known to those skilled in the art.

[0026] The solid-liquid hybrid phantom 3 includes a multi-layer solid model and a liquid model. The multi-layer solid model simulates the scalp layer and skull layer of the brain. The liquid model is placed inside the multi-layer solid model to simulate the dynamic changes in the gray matter and white matter of the brain.

[0027] Preferably, Figure 3 As shown, the human brain phantom used in the present invention is a solid-liquid hybrid phantom 3. The solid phantom uses sulfide silicone resin as a base, TiO2 as an optical scattering agent, and India ink as an optical absorber. According to the characteristics of the scalp layer and skull layer, the absorption coefficient and scattering coefficient of the solid phantom for near-infrared light are adjusted to produce a scalp layer 8 and a skull layer 7 respectively. These are stacked and placed in a phantom placement unit, and milk is poured into the remaining part to simulate the gray matter and white matter of the brain to form a liquid layer 6, completing the overall phantom production.

Claims

1. An intracranial hemorrhage detection experimental device, characterized in that: It includes a laser emitting unit, a suspension unit, a phantom placement unit, and a photoelectric detection unit; the laser emitting unit and the photoelectric detection unit are in the same plane and are placed vertically on the front of the phantom placement unit; the laser emitting unit emits near-infrared light, and the photoelectric detection unit detects the intensity of the near-infrared light transmitted after passing through the solid-liquid mixed phantom; the suspension unit includes a suspension beam, a sample suspension box, and a slide rail, a fixed volume of fresh sheep blood is set in the sample suspension box, the suspension beam suspends the sample suspension box through the slide rail, the fresh sheep blood simulates human brain hemorrhage, the suspension beam is placed on the slide rail and can slide freely to simulate bleeding in different positions of the human brain; the phantom placement unit is a cubic container composed of acrylic thin plates, and the solid-liquid mixed phantom is placed inside the phantom placement unit; the photoelectric detection unit includes an optical fiber, an avalanche photodiode, and an acquisition card, the near-infrared light transmitted from the solid-liquid mixed phantom enters the avalanche photodiode through the optical fiber to generate a signal, and the acquisition card performs acquisition calculations to obtain the results.

2. The intracranial hemorrhage detection experimental device according to claim 1, characterized in that: The acrylic sheet is slotted with a scale of 0.1 cm. The acrylic sheet can be moved according to the slot position to adjust the thickness of the solid-liquid hybrid phantom to simulate the cranial structure of different people.

3. The intracranial hemorrhage detection experimental device according to claim 1, characterized in that: The laser emission unit is a multi-wavelength beam combining laser, which includes 8 wavelengths. It can couple multiple wavelengths into a single-mode optical fiber for output, or adjust it to a single wavelength for output.

4. The intracranial hemorrhage detection experimental device according to claim 1, characterized in that: The distance between the laser emitting unit and the photoelectric detection unit is variable, so as to detect bleeding at different depths.

5. The intracranial hemorrhage detection experimental device according to claim 1, characterized in that: The laser emitting unit uses a multi-wavelength beam combining laser with a rated power of 500 mW.

6. The intracranial hemorrhage detection experimental device according to claim 1, characterized in that: The sample hanging box is made of transparent polyethylene and is connected to the hanging beam.

7. The intracranial hemorrhage detection experimental device according to claim 1, characterized in that: The solid-liquid hybrid phantom includes a multi-layer solid model and a liquid model. The multi-layer solid model simulates the scalp layer and skull layer of the brain. The liquid model is placed inside the multi-layer solid model to simulate the dynamic changes in the gray matter and white matter of the brain.

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