Imaging performance testing device

Abstract

The utility model discloses a device for testing imaging performance. The device comprises a first testing unit; the first test unit is used for testing first to-be-tested data of the imaging device; the first test unit is used for testing first to-be-tested data of the imaging device in the imaging interval. The catheter step and the imaging section are arranged in a matched mode; the catheter step is provided with a catheter groove corresponding to the imaging interval. The imaging information of the imaging catheter is actually measured and tested, the imaging is directly verified according to the actual physical size, and the measurement result is more accurate and visual.

Description

Technical Field

[0001] The invention relates to a testing device for an image acquisition device, in particular to a testing device for imaging performance. Background Art

[0002] At present, interventional therapy is a minimally invasive high-tech treatment technology with the characteristics of less trauma, quick recovery after surgery, multiple indications and targeted treatment. With rapid development in recent years, it has replaced surgery as the preferred treatment method in some fields.

[0003] Catheter imaging resolution and geometric position accuracy are indicators at a specified imaging radius. Currently, most evaluation technologies use traditional resolution imaging cards and then use image testing software to find the minimum distinguishable bright spot distance on the image. This is time-consuming and cannot be directly judged based on the actual design indicator requirements. In addition, the image testing software will introduce certain errors. Summary of the invention

[0004] The purpose of the present invention is at least to provide an imaging performance testing device to solve the problem that it is not possible to directly judge according to the actual design index requirements.

[0005] To achieve the above-mentioned purpose, the present invention provides an imaging performance testing device, comprising: a first testing unit; the first testing unit is used to test first test data of an imaging device; the first testing unit tests the first test data of the imaging device in an imaging interval; a catheter step, the catheter step is arranged in coordination with the imaging interval; the catheter step is provided with a catheter groove corresponding to the imaging interval.

[0006] Optionally, it may also include: a second testing unit; the second testing unit is used to test the second data to be tested of the imaging device; the second testing unit calculates the second data to be tested of the imaging device by testing the distance and position between the imaging device and the testing wire.

[0007] Optionally, the second data to be measured include: axial resolution, lateral resolution, withdrawal direction resolution, longitudinal geometric position accuracy, and transverse geometric position accuracy; the first data to be measured include: withdrawal direction geometric position accuracy, image geometric distortion, area measurement and imaging radius measurement.

[0008] Optionally, the second test unit comprises: two test wires arranged in parallel, the distance between the two test wires being adjustable; and a plurality of catheter fixing devices for placing the imaging catheter.

[0009] Optionally, the second testing unit includes a fixed platform and a mobile platform; the testing wire arranged on the fixed platform is a first metal wire; and the testing wire arranged on the mobile platform is a second metal wire.

[0010] Optionally, the mobile platform includes a fine-tuning platform and a storage table arranged above the fine-tuning platform; the fine-tuning platform is connected to an adjustment knob, and the fine-tuning platform moves by twisting the adjustment knob to drive the storage table to move.

[0011] Optionally, the plurality of catheter fixing devices are respectively provided with catheter grooves.

[0012] Optionally, the multiple catheter fixing devices are distributed in pairs, including several pairs of lateral (transverse) catheter fixing devices, the lateral (transverse) catheter fixing devices make the placement direction of the imaging catheter parallel to the test wire and directly above the test wire, and the catheter center line is equidistant from the two test wires, for measuring lateral resolution and transverse geometric position accuracy; two pairs of axial (longitudinal) catheter fixing devices, the axial (longitudinal) catheter fixing devices make the placement direction of the imaging catheter parallel to the test wire and coplanar, for measuring axial resolution and longitudinal geometric position accuracy; a pair of withdrawal catheter fixing devices; the withdrawal catheter fixing devices make the placement direction of the imaging catheter perpendicular to the test wire and parallel to the plane where the test wire is located, for measuring withdrawal direction resolution.

[0013] Optionally, the lateral (transverse) catheter fixing device is provided with a catheter channel.

[0014] Optionally, the lateral (transverse) catheter fixing device is detachably connected to the fixing platform.

[0015] Optionally, the axial (longitudinal) catheter fixing device is respectively arranged on the fixed platform and the movable platform.

[0016] Optionally, each of the catheter fixing devices is provided with a matching catheter fixing clip.

[0017] Optionally, the catheter fixing clamps are respectively arranged on the fixed platform and the movable platform; and the catheter fixing clamps are respectively arranged on both sides of the axial (longitudinal) catheter fixing device, and the positions thereof correspond to the axial (longitudinal) catheter fixing device.

[0018] Optionally, except for a pair of retracting catheter fixing devices, the catheter fixing devices are all provided with different imaging radii for changing the distance between the imaging catheter and the test wire.

[0019] Optionally, the first test unit further includes: a catheter step, the catheter step is arranged in cooperation with the imaging interval; the catheter step is provided with a catheter groove corresponding to the imaging interval.

[0020] Optionally, the imaging interval includes a first imaging interval, a second imaging interval and a third imaging interval; the first imaging interval is used to measure the imaging radius of the imaging catheter; the second imaging interval is used to measure the imaging area of ​​the imaging catheter; the third imaging interval is used to measure the geometric distortion and the geometric position accuracy performance in the retraction direction of the imaging catheter.

[0021] Optionally, a plurality of rectangular notches are provided on the third imaging interval, which are used to measure the geometric position accuracy performance in the withdrawal direction.

[0022] Optionally, a water tank is further included, the second test unit and the first test unit are arranged in the water tank, and the water tank is filled with developer or physiological saline.

[0023] The imaging performance testing device provided by the embodiment of the present invention can test the second test data and other first test data of the imaging catheter, for example, to determine whether the imaging radius, imaging area, image geometric distortion, geometric position accuracy in the withdrawal direction, longitudinal geometric position accuracy, transverse geometric position accuracy, resolution in the withdrawal direction, axial resolution and lateral resolution meet the requirements. The second test unit can test the clarity-related indicators of the imaging catheter, which may include resolution in the withdrawal direction, transverse geometric position accuracy, axial resolution and longitudinal geometric position accuracy. The first test unit can test the imaging radius performance of the catheter, the imaging area performance of the catheter, the image geometric distortion and the geometric position accuracy performance in the withdrawal direction. The second test unit of the test device determines the clarity-related indicators of the imaging catheter by the clarity and position of the test wire in the image collected by the imaging catheter, and the first test unit measures the imaging radius, imaging area and the like of the imaging catheter by the image collected by the imaging catheter in the imaging interval. By actually measuring the imaging information of the imaging catheter, the imaging is directly verified with the actual physical size, making the measurement result more accurate and intuitive. In addition, all the imaging performance testing work of the catheter can be completed by one tester, which greatly saves manpower.

[0024] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0026] Figure 1 is a schematic diagram of an imaging performance testing device in an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of an imaging performance testing device in an embodiment of the present invention;

[0028] Figure 3 is a partial schematic diagram of a device for testing imaging performance in an embodiment of the present invention;

[0029] Figure 4 is a partial schematic diagram of a device for testing imaging performance in an embodiment of the present invention;

[0030] Figure 5 is a partial schematic diagram of a device for testing imaging performance in an embodiment of the present invention;

[0031] Figure 6 is a lateral resolution measurement diagram for testing an imaging performance testing device in an embodiment of the present invention;

[0032] Figure 7 is a lateral geometric position accuracy measurement diagram for testing an imaging performance testing device in an embodiment of the present invention;

[0033] Figure 8 is a measurement diagram of the resolution in the withdrawal direction used for testing the imaging performance testing device in an embodiment of the present invention;

[0034] Fig. 9 is an imaging area measurement diagram used for testing an imaging performance testing device in an embodiment of the present invention;

[0035] Fig.10 is an IVUS imaging radius measurement diagram for testing an imaging performance testing device in an embodiment of the present invention;

[0036] Fig.11 is an OCT imaging radius measurement diagram for testing an imaging performance testing device in an embodiment of the present invention;

[0037] Fig.12 is a measurement diagram of geometric position accuracy in the retraction direction used for testing the imaging performance testing device in an embodiment of the present invention;

[0038] Fig.13 is an image geometric distortion measurement diagram for testing an imaging performance testing device in an embodiment of the present invention;

[0039] Fig.14 is an axial resolution measurement diagram for testing an imaging performance testing device in an embodiment of the present invention;

[0040] Fig.15 It is a longitudinal geometric position accuracy measurement diagram for testing the imaging performance testing device in an embodiment of the present invention.

[0041] Figure numerals: 10 water tank, 21 fixed platform, 22 movable platform, 231, 232 lateral (transverse) catheter fixing device, 233, 234 retraction catheter fixing device, 235 catheter groove, 236 catheter channel, 237 fixing part, 238 connecting part, 25 catheter fixing clamp, 251 clamping part, 252 fixing clamp connecting part, 253 fastening screw, 254 fastening spring, 30 catheter step, 31 catheter groove, 32 first imaging interval, 33 second imaging interval, 34 third imaging interval, 40 imaging catheter, 51 first metal wire, 52 second metal wire, 53, 54, 55, 56 axial (longitudinal) catheter fixing device, 60 adjustment knob DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] Reference below Figure 1-Figure 5 The present invention provides an imaging performance testing device, which includes a water tank 10. The testing device is placed in the water tank 10. A certain amount of developer or saline solution is placed in the water tank 10. The testing device may also include a fixed base, which is arranged in the water tank 10. A fixed platform 21 and a movable platform 22 are arranged on the fixed base. Figure 1 , Figure 2 , Figure 3As shown, the second test unit includes a fixed platform 21 and a movable platform 22. A first metal wire 51 is arranged on the fixed platform 21, and a second metal wire 52 is arranged on the movable platform 22. The two test wires are arranged in parallel. The imaging catheter 40 is arranged in the catheter groove of the catheter fixing device. The catheter fixing device is multiple and arranged in pairs. The catheter fixing device includes a pair of retraction catheter fixing devices 233, 234, two pairs of axial (longitudinal) catheter fixing devices 53, 54, 55, 56 and several pairs of lateral (transverse) catheter fixing devices 231, 232, wherein the lateral (transverse) catheter fixing devices 231, 232 are respectively arranged at both ends, wherein one end of the lateral (transverse) catheter fixing devices 231, 232 is fixedly connected to the fixed platform 21 and is not connected to the mobile platform 22, so that when the mobile platform 22 moves, the lateral (transverse) catheter fixing devices 231, 232 are fixed, the first metal wire 51 set on the fixed platform 21 will not move, the first metal wire 51 and the second metal wire 52 are arranged in parallel, wherein the first metal wire 51 is connected by a pair of axial (longitudinal) catheter fixing devices 53, 55, and the second metal wire 52 is connected by a pair of axial (longitudinal) catheter fixing devices 54, 56. A pair of axial (longitudinal) catheter fixing devices 53 and 55 are arranged on the fixed platform 21, and a pair of axial (longitudinal) catheter fixing devices 54 and 56 are arranged on the movable platform 22. The second metal wire 52 on the movable platform 22 can move, and the adjustment knob 60 is provided with a scale, through which the distance moved by the movable platform 22 can be known. The movable platform 22 is adjusted by adjusting the knob 60, and the movement of the movable platform 22 drives the second metal wire 52 to move, so that the distance between the two measuring wires changes.

[0044] The intravascular imaging device is suitable for candidate patients who are preparing to undergo intravascular interventional surgery. The purpose of the present invention is to cooperate with the intravascular imaging device and intuitively characterize various performance parameters of the intravascular imaging device through a testing device, including imaging radius, resolution, geometric position accuracy, image geometric distortion, imaging area, etc., so as to better reflect the imaging effect of the intravascular imaging device in the blood vessel cavity.

[0045] The imaging performance test device of the present invention can be used in conjunction with an ultrasonic optical coherence tomography synchronous imaging device, which can simultaneously collect clinical images through intravascular ultrasound (IVUS) and optical coherence tomography (OCT). It integrates IVUS and OCT imaging technologies onto one platform, thereby providing a more complete visualization experience. This integrated imaging system can not only ensure the advantages of IVUS in terms of depth and blood flow area, but also has the advantages of OCT in terms of image resolution. For OCT with higher test resolution requirements, the fine-tuning knob of the test device corresponds to a graduation value of 10um, a range of 0-6.5mm, and the middle position of the range when the two target lines are close together. Therefore, the minimum test resolution of the device can reach 10um, and the geometric position (target line spacing) can reach 3.25mm at most. The testable resolution range is wider and the accuracy is higher. By setting a scale on the adjustment knob 60, the distance moved by the test wire can be accurately judged by the scale, and the accuracy of the distance between the test wires is directly related to the accuracy of the measurement result.

[0046] The mobile platform 22 includes a fine-tuning platform and a storage platform disposed above the fine-tuning platform. The fine-tuning platform is connected to the adjusting knob 60, and the storage platform is moved by the movement of the fine-tuning platform.

[0047] Different catheter fixing devices make the spatial position between the imaging catheter 40 and the test wire different, thereby achieving the measurement of different indicators. Figure 3 As shown, the test wire includes a first metal wire 51 and a second metal wire 52. The metal wire of the test wire can be made of a metal material with a developing function, such as tungsten wire, platinum, etc. The two ends of the first metal wire 51 are connected to a pair of axial (longitudinal) catheter fixing devices 53 and 55, and the two ends of the second metal wire 52 are connected to a pair of axial (longitudinal) catheter fixing devices 54 and 56. The withdrawal catheter fixing device 233 is set on the fixed platform 21, and the withdrawal catheter fixing device 234 is set on the mobile platform 22, so that the connection line of the pair of withdrawal catheter fixing devices is perpendicular to the test wire, that is, the first metal wire 51 and the second metal wire 52.

[0048] like Figure 4 As shown, the lateral (transverse) catheter fixing devices 231 and 232 are provided with fixing parts 237, and the lateral (transverse) catheter fixing devices 231 and 232 are detachably connected to the fixing platform 21 through the fixing parts 237. The lateral (transverse) catheter fixing devices 231 and 232 are also provided with connecting parts 238, and the connecting parts 238 are arranged opposite to the fixing parts 237, and the connecting parts 238 are not connected to the moving platform 22. The middle part of the lateral (transverse) catheter fixing devices 231 and 232 is also provided with a catheter channel 236, and when passing through the middle axial (longitudinal) catheter fixing devices 53, 54, 55, 56, the catheter channel 236 is used for the imaging catheter 40 to pass.

[0049] like Figure 5 As shown, the catheter fixing clamp 25 includes a clamping portion 251 and a fixing clamp connecting portion 252. The fixing clamp connecting portion 252 is connected to the mobile platform 22 or the fixed platform 21 through a connecting column. The clamping portion 251 is provided with a protrusion for the imaging catheter 40. The catheter fixing clamp 25 can better fix the imaging catheter 40, ensuring that the imaging catheter 40 does not swing when withdrawing, ensuring that the collected image is more stable, and reducing the error caused by shaking. Figure 5 As shown, the fastener is arranged on the connecting column, and the fastener includes a fastening screw 253 and a fastening spring 254; the fastening screw 253 is used to fix the fastening spring 254 and the catheter fixing clamp 25, and the fastening spring 254 is adjusted by the fastening screw 253, so that the clamping force of the catheter fixing clamp 25 can be adjusted, so that the catheter fixing clamp 25 fixes the catheter more stably. The catheter fixing clamp can also be a compression spring or a magnet.

[0050] The compression amount of the compression spring 254 is adjusted by the locking depth of the fastening screw 253, so that the clamping force of the catheter fixing clamp 25 can be adjusted, so that the catheter fixing clamp 25 fixes the catheter more stably and protects the catheter at the same time. The catheter fixing clamp can also be a compression spring or a magnet.

[0051] The lateral (transverse) catheter fixing devices 231, 232 and the retraction catheter fixing devices 233, 234 are also provided with pressure blocks or magnets to constitute corresponding catheter fixing stabilization devices for stabilizing the imaging catheter 40, reducing the error caused by shaking when the imaging catheter 40 is retracted, and ensuring that the acquired image is more stable.

[0052] The lateral (transverse) catheter fixing devices 231 and 232 are arranged with different specifications. First, the heights are different, so that the vertical distance between the imaging catheter and the test wire can be changed. Different scale marks are engraved on different catheter fixing devices to show the distance between the imaging radius and the test wire. The position of the imaging catheter can be selected according to the actual situation, and the catheter fixing device can also be replaced according to the situation.

[0053] Different spatial position transformations are performed between the imaging catheter 40 and the test wire, and the geometric position accuracy of the two test wires or the resolution of the two test wires in the acquired image is determined through the image captured by the imaging catheter 40, and the second test data of the imaging catheter 40 is measured, wherein the second test data may include axial resolution, lateral resolution, withdrawal direction resolution, longitudinal geometric position accuracy, and transverse geometric position accuracy.

[0054] The first test unit is mainly used to measure the first test data, including the geometric position accuracy of the withdrawal direction, the geometric distortion of the image, the area measurement and the imaging radius measurement. Figure 2As shown, it includes a catheter step 30, and the catheter step 30 can be set with different step parts. Each step part is provided with a catheter groove 31 for placing an imaging catheter 40. The position of each catheter groove 31 corresponds to its corresponding imaging interval. The imaging catheter 40 is set in different imaging intervals to measure different imaging indicators. Among them, the first imaging interval 32 is used to measure the imaging radius of the imaging catheter. During the measurement, the imaging core of the imaging catheter 40 is tangent to the inner diameter of the first imaging interval 32, and the diameter of the first imaging interval 32 is between 1-20mm. The second imaging interval 33 is used to measure the imaging area of ​​the imaging catheter, and the third imaging interval 34 is used to measure the image geometric distortion and the geometric position accuracy of the withdrawal direction of the imaging catheter. The third imaging interval 34 is dug with a number of notches, wherein the notches can be rectangular, and the multiple rectangular notches can be equidistantly distributed or unequally distributed. By measuring the length of the rectangular notch, the ratio of its deviation to the actual calibration value is calculated.

[0055] The imaging radius performance test of the imaging catheter is mainly carried out through the first imaging interval 32 on the first test unit. The imaging catheter 40 is placed in the catheter slot 31, and the imaging catheter is extended into the first imaging interval 32, so that the imaging core of the imaging catheter is tangent to the inner diameter of the first imaging interval 32. After being straightened, the imaging catheter is fixed with a corresponding magnet, and the IVUS and OCT rotational withdrawal imaging is performed by setting the withdrawal speed of the imaging catheter at different speeds. The distance between the imaging head or imaging core of the imaging catheter and the inner wall of the circular hole on the imaging radius measurement device 30 is measured on the imaging device to determine whether the imaging radius can meet the corresponding index requirements. Fig.10 and Fig.11 As shown, the imaging core of the imaging catheter is tangent to the inner edge of the first imaging interval 32, and the maximum imaging radius is measured with the center of the image after imaging as the starting point and the farthest point of the bright ring as the end point.

[0056] The imaging area performance test of the imaging catheter is mainly carried out through the second imaging interval 33 on the first test unit. The imaging catheter 40 is placed in the catheter groove, and the imaging catheter is extended into the second imaging interval 33, so that the imaging core of the imaging catheter is located at the center of the inner diameter of the second imaging interval 33. After being straightened, the imaging catheter is fixed with a corresponding magnet, and the IVUS and OCT rotational withdrawal imaging is performed by setting the withdrawal speed of the imaging catheter at different speeds. The area of ​​the inner contour of the circular hole on the area measurement device is measured on the imaging device to determine whether the imaging area can meet the corresponding index requirements, such as Fig. 9 As shown, the imaging catheter is set in the second imaging interval 33, and the imaging core is used to scan the circular tubular blood vessel phantom of known area in the second imaging interval 33. The second imaging interval 33 is cylindrical and simulates the blood vessels of the human body. The image information collected by the imaging catheter is used to measure the cross-sectional area of ​​the circle on the image information to determine the imaging area performance of the imaging catheter.

[0057] The test of the geometric position accuracy performance and image geometric distortion of the imaging catheter in the withdrawal direction is mainly carried out through the third imaging interval 34 of the first test unit. The imaging catheter is placed in the catheter groove, and the imaging catheter is extended into the third imaging interval 34 so that the imaging core of the imaging catheter is located at the center of the inner diameter of the third imaging interval 34. After being straightened, it is fixed with a corresponding magnet, and the rotational withdrawal imaging of IVUS and OCT is performed by setting the withdrawal speed of the imaging catheter at different speeds. The side length and diagonal length of the square inner contour of the image geometric distortion and the withdrawal direction geometric position accuracy measurement device are measured on the imaging device to determine whether the image geometric distortion can meet the respective corresponding index requirements; the measurement of image geometric distortion and withdrawal direction geometric position accuracy on the imaging device is to dig a number of rectangular notches in the withdrawal direction of the catheter, and the length of the rectangular notches is measured to determine whether the withdrawal direction geometric position accuracy can meet the respective corresponding index requirements, such as Fig.12 As shown, the IVUS imaging information is on the left side of the figure, and the OCT imaging information is on the right side. The circled part at the bottom of the figure is the information of the continuous images collected by the imaging catheter in the third imaging interval 34. Each rectangular notch can be seen in the figure, and the length of the rectangular notch is measured to determine whether the geometric position accuracy in the withdrawal direction can meet the corresponding index requirements. Fig.13 As shown, the imaging catheter is placed in the third imaging interval 34 to collect images, the catheter center axis and the model center axis coincide as much as possible, the imaging core should be placed in a closed area, and a clear quadrilateral should be visible on the image. The four sides and diagonal of the quadrilateral are measured using the measurement function of the device on the image to determine whether the image geometric distortion can meet the corresponding index requirements.

[0058] The test of the second test data index of the imaging catheter is mainly carried out around the three directions of axial, lateral and withdrawal, and is measured by the second test unit. A plurality of catheter fixing devices are arranged on the fixed platform 21, and each catheter fixing device is provided with a catheter groove for placing the catheter. Among them, the first metal wire 51 and the second metal wire 52 are attached together, and the distance between the two measuring wires is exactly 0 at this time, and the adjustment knob 60 is just in the middle position of the range scale. The distance between the two measuring wires is adjusted by adjusting the knob 60 to reach the required specified nominal value, and then the imaging catheter is placed in the catheter groove on the catheter fixing device corresponding to the three directions, and fixed with the corresponding catheter fixing stabilizing device after straightening, wherein the catheter fixing stabilizing device can be a compression spring or a magnet, and the rotational withdrawal imaging of IVUS and OCT is performed by setting the withdrawal speed of the imaging catheter at different speeds, and the images of the points corresponding to the two test wires on the imaging device are observed to determine whether the respective resolution requirements are met. As Figure 6 , 8As shown in 14, the circled area in the image can clearly distinguish two imaging points, and it is judged that the respective resolution requirements are met. Figure 6 In A, there are lateral resolution images of two test wires. Figure 6 It is the image of the test wire. The two points AB are on a circle. The radius of the circle is the imaging radius, and the distance between AB is the target line distance. Figure 8 In the embodiment, the imaging catheter is placed on the withdrawal catheter fixtures 233 and 234, and the imaging core is withdrawn. Figure 8 The circled part below is the image of the two target lines collected during the retracement, and its enlarged image is shown below. Figure 8 In the figure, two points can be seen on the left and right below, which are the first metal wire 51 and the second metal wire 52. Fig.14 In A, there are axial resolution images of two test wires. Fig.14 It is the image of the test wire. Points AB are located on two circles with the same radial direction but different radii. The radius difference between the two circles (AB distance) is the target line distance.

[0059] The geometric position accuracy performance test of the imaging catheter is mainly carried out around the three directions of lateral, longitudinal and retraction, and is measured by the second test unit. Similarly, in the initial position, the catheter fixture is attached to the two tungsten wires. At this time, the distance between the test wires is exactly 0, and the adjustment knob 60 is exactly in the middle of the range scale. The distance between the two test wires is adjusted by adjusting the knob 60 to reach the required nominal value. Then the imaging catheter is placed in the catheter groove on the catheter fixture corresponding to the three directions. After straightening, it is fixed with the corresponding catheter fixing and stabilizing device, where the catheter fixing and stabilizing device can be a compression spring or a magnet. The rotational retraction imaging of IVUS and OCT is performed by setting the retraction speed of the imaging catheter at different speeds. Figure 7 In the process, the imaging distance between the two test wires, point A and point B, is measured on the equipment to determine whether the respective lateral geometric position accuracy requirements are met. Fig.15 In the process, the imaging distance between the two test wires, point A and point B, is measured on the equipment to determine whether the respective longitudinal geometric position accuracy requirements are met. Fig.12 In the figure, the circled part is the imaging spacing of the groove, which is used to determine whether the longitudinal geometric position accuracy requirements are met.

[0060] In the present application, the lateral direction can also be referred to as the transverse direction, and the lateral resolution and transverse geometric position accuracy are measured by placing the imaging catheter on the lateral catheter fixtures 231 and 232; the axial direction can also be referred to as the longitudinal direction, and the axial resolution and longitudinal geometric position accuracy can be measured by placing the imaging catheter on the axial catheter fixtures 53, 54, 55, and 56. The resolution in the withdrawal direction is measured by placing the imaging catheter on the withdrawal catheter fixtures 233 and 234. The catheter fixing and stabilizing device can be a compression spring or a magnet, and the compression spring is used to adjust the clamping force of the catheter.

[0061] The catheter fixture is provided with different specifications. First, the height is different, so that the vertical distance between the imaging catheter and the test wire can be changed. In addition, there are words on the catheter fixture to show the vertical distance between different catheter grooves and the test wire, so that the imaging radius of the catheter can be changed. The position of the imaging catheter can be selected according to the situation. The catheter fixture can also be replaced according to the situation. The lateral (transverse) catheter fixtures 231, 232, the retraction catheter fixtures 233, 234 and the axial catheter fixtures 53, 54, 55, 56 are respectively provided with words, which show the distance between the imaging radius and the test wire. For example, Figure 4 In the figure, 2mm and 30um on the upper surface of the lateral (transverse) catheter fixtures 231 and 232 represent the spacing between the two test wires, and 2mm on the fixture 237 represents the imaging radius. Each catheter fixture is provided with different specifications, that is, marked with different scales, and can be replaced according to the situation when in use.

[0062] The first imaging interval 32 is used to measure the imaging radius of the imaging catheter, the second imaging interval 33 is used to measure the imaging area of ​​the imaging catheter, and the third imaging interval 34 is used to measure the image geometric distortion and the geometric position accuracy of the withdrawal direction of the imaging catheter. The catheter fixing and stabilizing device can be a magnet or a pressure block.

[0063] The imaging catheter in the present application may include an imaging core, which is used to collect image information within blood vessels or other human lumens, wherein the imaging core may include IVUS and OCT. The left side of the imaging core acquisition picture is the IVUS image, and the right side is the OCT image.

[0064] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An imaging performance testing device for measuring the imaging performance of an imaging catheter, characterized in that: include: The first test unit; The first testing unit is used to test the first test data of the imaging device; The first testing unit tests the first test data of the imaging device within the imaging interval; A catheter step, wherein the catheter step is arranged in cooperation with the imaging zone; The catheter step is provided with a catheter groove corresponding to the imaging interval.

2. The imaging performance testing device according to claim 1, characterized in that: The first data to be measured include: geometric position accuracy in the withdrawal direction, image geometric distortion, area measurement and imaging radius measurement.

3. The imaging performance testing device according to claim 2, characterized in that: The imaging interval includes a first imaging interval, a second imaging interval and a third imaging interval; The first imaging interval is used to measure the imaging radius of the imaging catheter; The second imaging interval is used to measure the imaging area of ​​the imaging catheter; The third imaging interval is used to measure the geometric distortion and the geometric position accuracy performance of the imaging catheter in the withdrawal direction.

4. The imaging performance testing device according to claim 3, characterized in that: The third imaging interval is provided with a plurality of rectangular notches for measuring the geometric position accuracy performance in the withdrawal direction.

5. The imaging performance testing device according to any one of claims 1 to 4, characterized in that: Also comprising a second test unit, The second testing unit is used to test the second test data of the imaging device; The second testing unit calculates the second test data of the imaging device by testing the distance and position between the imaging device and the testing wire.

6. The imaging performance testing device according to claim 5, characterized in that: The second data to be measured include: axial resolution, lateral resolution, withdrawal direction resolution, longitudinal geometric position accuracy, and transverse geometric position accuracy.

7. The imaging performance testing device according to claim 5, characterized in that: The second test unit comprises: two test wires arranged in parallel, and the distance between the two test wires can be adjusted; Multiple catheter fixation devices for placement of imaging catheters.

8. The imaging performance testing device according to claim 5, characterized in that: The second testing unit also includes a fixed platform and a mobile platform; The test wire arranged on the fixed platform is a first metal wire; The testing wire arranged on the moving platform is a second metal wire.

9. The imaging performance testing device according to claim 8, characterized in that: The mobile platform includes a fine-tuning platform and a storage platform arranged above the fine-tuning platform; The fine-tuning platform is connected to the adjusting knob, and the fine-tuning platform is moved by twisting the adjusting knob to drive the storage table to move.

10. The imaging performance testing device according to claim 5, characterized in that: A sink is also included. The first test unit and the second test unit are arranged in the water tank, The water tank is filled with developer or physiological saline.

Images