Head support matched with angiography machine to fix head and accurately measure
By using semi-permeable X-ray calibration balls and fixed head support of X-ray material in DSA examination, the problems of insolid head fixation and inaccurate measurement are solved, and more efficient cerebrovascular imaging and accurate measurement are achieved.
Patent Information
- Application Number
- CN202420371407.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-02-28
AI Technical Summary
The head is not fixed during the existing DSA examination, resulting in poor cerebrovascular imaging, and the existing measurement methods have problems such as large errors and inaccuracy.
Design a fixed head support with an angiography machine, equipped with a semi-permeable X-ray calibration ball, which accurately measures the size of the contrast vessel through the DSA detector, and ensures the head fixation using the limiting mechanism, restraint belt and X-ray material. and accuracy of measurement.
Reduces imaging failure due to head shaking, improves measurement accuracy and stability, reduces contrast agent injection and X-ray exposure dose, and provides more accurate measurement of vascular lesion size.
Smart Images
Figure CN222285496U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to a head support which cooperates with a blood vessel angiography machine to fix the head and perform accurate measurements. Background Art
[0002] As the gold standard for the examination of cerebrovascular diseases, DSA has been basically popularized in medical institutions above the county level. However, during the DSA examination or treatment of the head and neck, due to the loose fixation of the head, slight head movement will cause the cerebrovascular imaging effect to deteriorate. Although the pixel shift function of some DSA machines can correct the subtraction results caused by slight head movement, for agitated patients who are difficult to cooperate in emergency, the imaging effect will affect the diagnosis and even lead to the failure of the examination or treatment when the head rotates slightly or moves within a large range. The headrest of the DSA machine is often too large to affect the rotation and movement during the machine examination, or the headrest is not firmly fixed, resulting in poor imaging effect of DSA examination. Therefore, many patients rarely use the headrest of the DSA machine during the examination, and usually use multi-layer dressings or ordinary pillows to fix the head. However, the dressings and ordinary pillows are large in size and the fixation effect is not ideal. In clinical practice, there is an urgent need to design a small head fixation headrest that matches the machine examination bed.
[0003] During the interventional treatment of cerebrovascular diseases, accurate measurement is one of the important factors that determine the success of the operation. If intracranial vascular lesions cannot be accurately measured to less than a millimeter to guide the operation, it may cause catastrophic consequences (reference AJNR Am J Neuroradiol. 2009; 30: 459-461). During the balloon dilatation of intracranial vascular stenosis, if the blood vessel diameter cannot be accurately measured, the balloon is selected to be too small or too large, which will lead to ineffective treatment or vascular rupture and bleeding. During the implantation of intracranial vascular stents, if the stent diameter is too large or too small, it will affect the radial support force of the stent on the blood vessel or cause poor stent adhesion. Accurate measurement of the blood vessel diameter can help the surgeon select a suitable stent. The selection of the coil size during aneurysm embolization requires accurate measurement of the aneurysm size, otherwise a coil that is too large will easily rupture the aneurysm, while a coil that is too small will lead to incomplete embolization or even material escape with the blood flow. There are four main methods for measuring intracranial vascular lesions: one is to measure the size of the lesion by 3D reconstruction after 3D rotational angiography, but due to factors such as the threshold setting during the reconstruction process, the measured lesion parameters will be significantly different from those of the 2D image (reference AJNR Am J Neuroradiol. 2009;30:831-834); Secondly, the contrast catheter is used as a reference for measurement. However, there are many types of contrast catheters. For example, the inner diameter of the 6F catheter of the same nominal diameter varies from 0.070 inches to 0.088 inches from different manufacturers. Using these small-diameter guide catheters as a ruler to measure larger lesions may result in large errors; Third, the DICOM format image is directly measured using special software. This method requires special software to read the information in the image, such as the head position, the height of the examination bed, the distance between the detector and the radiation source, etc., and calculate the lesion size based on the relevant parameters. However, this measurement method is currently difficult to implement for most low-configuration DSA machines. Although some third-party software can directly measure the lesion size on the DSA image, the ruler used is the size of a single pixel of the detector. Since the X-rays are distributed in a cone shape, the lesion position is far away from the detector, and the projection formed on the detector becomes larger, the measured lesion size is often larger than the actual size (reference AJNR Am J Neuroradiol.2009;30:459-461); Fourth, the method of attaching a calibration steel ball to the head and neck. The calibration steel ball is attached to the patient's forehead or neck and as close to the lesion as possible to reduce the error caused by the cone ray. This method is relatively accurate, but the calibration steel ball used in this method is often difficult to pass through X-rays, which may block lesions or normal blood vessels. At the same time, when the calibration steel ball is far away from the lesion blood vessel, it is also easy to cause measurement errors. After the examination, the calibration steel ball is easily taken back to the ward by the patient and discarded. In view of the disadvantages of the above measurement methods and the urgent need for accurate measurement of lesion size in clinical work, it is necessary to find other more suitable measurement methods.
[0004] Although several patents have previously disclosed head support structures that are compatible with DSA machines (such as patent application numbers CN201910148761.4; CN201920725817.3; CN202121863356.X; CN202321368579.8), the production process of these patented products is complicated. Some products have metal screws or spring fixing structures that affect the penetration of radiation into human tissue, and there are no calibration objects for accurate measurement of lesions. Utility Model Content
[0005] The utility model aims at the deficiencies of the prior art and provides a head support for fixing the head and accurately measuring the angiography machine. The size of the angiography blood vessel is accurately measured by positioning a semi-transparent X-ray calibration ball equipped on the head support and using the calibration ball diameter displayed on the DSA detector.
[0006] The utility model is realized through the following technical scheme, which provides a head support for fixing the head and accurately measuring in cooperation with a blood vessel angiography machine, comprising a base connected to a DSA examination bed; a limiting mechanism for placing the head is connected to the top of the base through a supporting mechanism, and the limiting mechanism is a U-shaped groove inclined along the front-back direction; a through hole is provided on the limiting mechanism, and a calibration ball is provided in the through hole; restraint belts for fixing the head are provided on the left and right sides of the limiting mechanism, and the restraint belts are provided with calibration balls; the average diameter of two calibration balls located on both sides of the angiography blood vessel in the DSA angiography result and at the same distance from the angiography blood vessel is used as the calibration value, or the diameter of a calibration ball located in the same plane as the angiography blood vessel and the plane is parallel to the DSA detector is used as the calibration value, or the diameter of a calibration ball closest to the angiography blood vessel is used as the calibration value.
[0007] When measuring angiographic blood vessels, the patient's head is placed in the U-shaped groove of the limiting mechanism to prevent the patient's head from shaking; the through hole on the limiting mechanism is used to fix the calibration ball, and the calibration ball in the through hole is developed on the DSA detector as a reference for measuring the patient's angiographic blood vessels; the restraint belt is used to limit the patient's head. When measuring angiographic blood vessels, the restraint belt fixes the patient's head to prevent the patient's head from moving during the examination or treatment process, which affects the measurement results; the calibration ball on the restraint belt is a reference for measuring the patient's angiographic blood vessels on the DSA angiogram, and the position of the calibration ball on the restraint belt is adjustable, which is convenient for adjustment according to the position of the patient's angiographic blood vessels. Adjust the position of the calibration ball on the restraint belt to reduce the number of angiography and measurements; when measuring the angiography vessel, use the two calibration balls on the head support that are closest to the angiography vessel on DSA angiography as fixed calibration balls, or adjust the calibration balls on the restraint belt to the end of the angiography vessel away from the fixed calibration balls, and the two calibration balls are at equal distances from the angiography vessel, and the average value of the diameters of the two calibration balls in the DSA angiography results is used as the calibration value to measure the angiography vessel, or use the diameter of the calibration ball that is in the same plane as the angiography vessel and the plane is parallel to the DSA detector as the calibration value, or use the diameter of the calibration ball that is closest to the angiography vessel as the calibration value.
[0008] As an optimization, the base is a U-shaped slot that opens downward and extends in the front-to-back direction. The head end of the DSA examination bed is stuck in the U-shaped slot; the base slides in the front-to-back direction and is stuck at the head position of the DSA examination bed. The fixed plate at the bottom of the base is stuck to the bottom of the examination bed. When performing angiographic vascular measurement, if the patient shakes his head, ensure that the headrest is firmly fixed to the examination bed.
[0009] As an optimization, the base includes a main body connected to the supporting mechanism and a base plate connected to the main body, and the base plate is placed flat on the DSA inspection bed.
[0010] As an optimization, the through holes are located at the bottom and left and right sides of the limiting mechanism, and multiple rows of through holes are provided on the limiting mechanism in the front-to-back direction, and each row is provided with multiple through holes; when performing angiographic blood vessel measurement, the through holes are set at different positions on the limiting mechanism, and the appropriate through holes can be selected to place the calibration ball according to the different positions of the patient's angiographic blood vessels, so as to facilitate the measurement of the angiographic blood vessels.
[0011] As an optimization, the supporting mechanism is located on the left and right sides of the top of the base, and the multiple supporting mechanisms are symmetrically distributed along the left and right directions, and the left and right sides of the limiting mechanism are respectively connected to the supporting mechanism; the supporting mechanisms on the left and right sides play a stable supporting role for the limiting mechanism. When performing angiographic blood vessel measurement, if the patient shakes his head, the supporting mechanism prevents the limiting mechanism from shaking, which affects the measurement results.
[0012] As an optimization, the base, supporting mechanism and limiting mechanism are made of X-ray transparent materials; when measuring the angiographic blood vessels, the patient's head is placed in the limiting mechanism, and the X-rays pass through the base, supporting mechanism and limiting mechanism to measure the angiographic blood vessels in the patient's head, thereby ensuring the accuracy of DSA angiography.
[0013] As an optimization, the calibration ball is made of semi-transparent X-ray material. When measuring the angiographic blood vessels, the patient's head is placed in the limiting mechanism, and the X-rays pass through the calibration ball to measure the angiographic blood vessels in the patient's head, thereby ensuring the accuracy of DSA angiography. The calibration ball also leaves an image on the DSA angiography, which is convenient for use as a reference object to measure the size of the angiographic blood vessels.
[0014] As an optimization, the width of the U-shaped groove is 20cm-30cm, and the limiting mechanism is inclined at an angle of 15°-45° to the bed surface, with a thickness of 2mm-8mm; it is convenient to place the patient's head in the limiting mechanism; different sizes of headrests are replaced according to the size of the patient's head, and when performing angiographic vascular measurement, the patient's head is placed in the U-shaped groove according to the ergonomic design to avoid discomfort to the patient and prevent the patient's head from shaking and causing damage to the limiting mechanism.
[0015] As an optimization, there are 6-20 through holes, and the through hole diameter is 5mm-15mm, the diameter of the calibration ball is 5mm-20mm, and the density of the calibration ball is 2.5g / cm 3 -5g / cm 3 , 1-3 calibration balls are arranged on the restraint belt; when measuring the angiographic blood vessels, through holes and calibration balls of different diameters are used according to the different sizes of the patient's head, so as to provide more accurate measurement for the detection of the angiographic blood vessels.
[0016] The beneficial effects of the utility model are as follows: the size of the angiographic blood vessels is accurately measured by the diameter of the calibration ball displayed on the DSA detector through the semi-transparent X-ray calibration ball equipped with the X-ray transparent head support, thereby reducing the number of angiography required for measurement, thereby reducing the amount of contrast agent injection and the X-ray exposure dose; head supports of different sizes can be used according to the size of the patient's head, with through holes and calibration balls of different diameters, so as to better fix the patient's head, avoid angiography failure caused by shaking of the patient's head during the angiography process, and at the same time more accurately measure the size of the patient's angiographic blood vessels and lesions. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the structure of the utility model;
[0018] Figure 2 This is a schematic diagram of the installation of the utility model on a DSA machine;
[0019] Figure 3 is another structural schematic diagram of the base;
[0020] Figure 4 This is a picture showing the effect of cranial angiography for testing the utility model;
[0021] As shown in the figure:
[0022] 1. Limiting mechanism, 2. Supporting mechanism, 3. Base, 4. Through hole, 5. Restraint belt, 6. Calibration ball, 7. Examination bed, 8. X-ray tube, 9. X-ray, 10. X-ray detector, 11. Calibration ball development, 12. Intracranial vascular image, 13. Base plate. DETAILED DESCRIPTION
[0023] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.
[0024] like Figure 1-3 The headrest for fixing the head and accurately measuring the angiography machine of the utility model shown in the figure comprises a base 3 connected to a DSA examination bed 7; the top of the base 3 is connected to a limiting mechanism 1 for placing the head through a supporting mechanism 2, and the limiting mechanism 1 is a U-shaped groove inclined along the front-back direction; a through hole 4 is provided on the limiting mechanism 1, and a calibration ball 6 is provided in the through hole 4; restraint belts 5 for fixing the head are provided on the left and right sides of the limiting mechanism 1, and the restraint belts 5 are provided with calibration balls 6; the average diameter of two calibration balls 6 located on both sides of the angiography blood vessel and at the same distance from the angiography blood vessel in the DSA angiography result is used as the calibration value, or the diameter of the calibration ball 6 located in the same plane as the angiography blood vessel and the plane is parallel to the DSA detector is used as the calibration value, or the diameter of the calibration ball 6 closest to the angiography blood vessel is used as the calibration value.
[0025] When performing angiographic blood vessel measurement, the staff places the patient's head in the U-shaped groove of the limiting mechanism 1, and then fixes the patient's head on the limiting mechanism 1 with a restraining belt 5. There are calibration balls in the through hole 4 on the limiting mechanism 1 and the restraining belt 5. The DSA machine X-ray tube 8 is turned on, and the X-rays 9 pass through the headrest and the patient's head in turn and are projected onto the DSA machine X-ray detector 10 and form an intracranial blood vessel image 12 on the X-ray detector 10. The calibration ball forms a development 11 on the intracranial blood vessel image 12; then, according to the intracranial blood vessel image 1 2 is calibrated and measured with the position of the calibration ball 6; when the calibration balls 6 on the head support are respectively located on both sides of the contrast blood vessel and the two calibration balls are at the same distance from the contrast blood vessel, the average diameter of the two calibration balls on the intracranial blood vessel image 12 is taken as the calibration value; if the calibration ball and the contrast blood vessel are located in the same plane and the plane is parallel to the DSA detector, the diameter of the calibration ball is taken as the calibration value; or if the first two methods cannot be implemented, such as a diseased blood vessel close to the body surface, the diameter of the calibration ball closer to the contrast blood vessel is taken as the calibration value.
[0026] The base 3 is a U-shaped slot that opens downward and extends in the front-to-back direction. The slot can be clamped on the head of the DSA examination bed 7. Before performing angiographic blood vessel measurement, the base 3 of the head support slides in the front-to-back direction and is clamped on the head of the DSA examination bed 7. The head support is firmly fixed on the examination bed 7. The base 3 can also be Figure 4 The structure removes the U-shape and changes it into a wide base shape and is placed flat on the DSA examination bed 7, that is, the base 3 includes a main body connected to the supporting mechanism and a base plate 13 connected to the main body. The base plate 13 is placed flat on the DSA examination bed. During the examination, the patient's back presses against the base plate 13 and the head is fixed on the limiting mechanism 1, which can also play the role of fixing the base.
[0027] The through holes 4 are located at the bottom and left and right sides of the limiting mechanism 1, and a plurality of rows of through holes 4 are arranged on the limiting mechanism 1 along the front-to-back direction, and a plurality of through holes 4 are arranged in each row; when performing angiographic blood vessel measurement, the staff turns on the X-ray tube 8 of the DSA machine, and the X-rays 9 pass through the head support and the patient's head in turn and are projected onto the X-ray detector 10 of the DSA machine, and then select the appropriate calibration ball development 11 for calibration according to the position of the angiographic blood vessels on the intracranial blood vessel image 12 displayed by the X-ray detector 10 and the position of the calibration ball 6.
[0028] The supporting mechanism 2 is located on the left and right sides of the top of the base 3, and the multiple supporting mechanisms 2 are symmetrically distributed along the left and right directions, and the left and right sides of the limiting mechanism 1 are respectively connected to the supporting mechanism 2; during angiography, the supporting mechanism 2 supports the limiting mechanism 1 to prevent the patient's head located in the limiting mechanism 1 from shaking.
[0029] A soft material can be padded in the groove of the limiting mechanism 1; the soft material can protect the patient's head; at the same time, the thickness of the soft material can be adjusted to make the U-shaped groove of the head support adapt to the patient's head, avoiding the head support being unable to fix the patient's head. The position of the patient's angiographic blood vessels can also be adjusted by adjusting the thickness of the soft material so that the angiographic blood vessels are located in the middle of the calibration ball 6 on the head support and / or the calibration ball 6 on the restraint belt 5.
[0030] The base 3, the supporting mechanism 2 and the limiting mechanism 1 are made of materials with good X-ray permeability; when performing angiographic blood vessel measurement, the patient's head is placed in the limiting mechanism 1, and the X-rays pass through the base 3, the supporting mechanism 2 and the limiting mechanism 1 to measure the angiographic blood vessels in the patient's head, ensuring clear DSA angiography.
[0031] The calibration ball 6 is made of a semi-transparent X-ray material. When measuring the contrast blood vessels, the patient's head is placed in the limiting mechanism 1. X-rays pass through the calibration ball 6 to measure the contrast blood vessels in the patient's head, which can ensure that the DSA contrast blood vessels can still display the blood vessel image 12 when they are blocked by the calibration ball. At the same time, the calibration ball 6 leaves a development 11 on the DSA image, which is convenient for measuring the size of the contrast blood vessels as a reference.
[0032] The width of the U-shaped groove is 20cm-30cm, and the limiting mechanism 1 is inclined at an angle of 15°-45° to the bed surface, and has a thickness of 2mm-8mm; it is convenient to place the patient's head in the limiting mechanism 1; before performing angiographic blood vessel measurement, replace headrests of different sizes according to the size of the patient's head, and place the patient's head in the U-shaped groove.
[0033] As an optimization, the number of through holes 4 is 6-20, and the diameter of through holes 4 is 5mm-15mm, the diameter of calibration ball 6 is 5mm-20mm, and the density of calibration ball 6 is 2.5g / cm 3 -5g / cm 3 , 1-3 calibration balls 6 are arranged on the restraining belt 5; when performing angiographic blood vessel measurement, through holes 4 and calibration balls of different diameters are used according to the size of the patient's head.
[0034] In actual operation, when measuring the contrast blood vessels, the staff clamps the bottom of the head support at the head of the DSA examination bed 7 along the front-to-back direction; then the staff places the patient's head in the U-shaped groove of the limit mechanism 1 padded with soft material, turns on the DSA machine X-ray tube 8, and the X-rays 9 pass through the head support and the patient's head in turn and are projected onto the DSA machine X-ray detector 10, forming an intracranial vascular image 12 on the X-ray detector 10, and then the position of the calibration ball 6 is determined according to the position of the patient's contrast blood vessels on the intracranial vascular image 12. When the calibration balls 6 on the head support are located on both sides of the contrast blood vessels and the two calibration balls are at the same distance from the contrast blood vessels, the average diameter of the imaging 11 of the two calibration balls on the intracranial vascular image 12 is taken as the calibration value; if the calibration ball and the contrast blood vessels are located in the same plane and the plane is parallel to the DSA detector, the diameter of the calibration ball is taken as the calibration value, or if the first two methods cannot be implemented, such as a diseased blood vessel close to the body surface, the diameter of the calibration ball closer to the contrast blood vessel is taken as the calibration value.
[0035] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.
Claims
1. A head support for fixing the head and accurately measuring with a DSA angiography machine, comprising a base (3) connected to a DSA examination bed (7); characterized in that: The top of the base (3) is connected to a limiting mechanism (1) for placing the head via a supporting mechanism (2), the limiting mechanism (1) being a U-shaped groove arranged obliquely in the front-rear direction; a plurality of through holes (4) are provided on the bottom and left and right sides of the limiting mechanism (1); restraint belts (5) for fixing the head are provided on the left and right sides of the limiting mechanism (1); calibration balls (6) are provided on both the through holes (4) and the restraint belts (5); the average value of the diameters of two calibration balls (6) located on both sides of the contrast blood vessel and at the same distance from the contrast blood vessel in the DSA angiography result is used as the calibration value, or the diameter of the calibration ball (6) located on the same plane as the contrast blood vessel and the plane is parallel to the DSA detector is used as the calibration value, or the diameter of the calibration ball (6) closest to the contrast blood vessel is used as the calibration value.
2. The head support for fixing the head and accurately measuring the angiography machine according to claim 1, characterized in that: The base (3) is a U-shaped slot that opens downward and extends in the front-to-back direction, and the base (3) is clamped on the DSA bedside fixing plate.
3. The head support for fixing the head and accurately measuring the angiography machine according to claim 1, characterized in that: The base (3) comprises a main body connected to the support mechanism (2) and a base plate (13) connected to the main body, and the base plate (13) is placed flat on the DSA examination bed.
4. The head support for fixing the head and accurately measuring the angiography machine according to claim 1, characterized in that: The limiting mechanism (1) is provided with a plurality of rows of through holes (4) along the front-to-back direction, and each row is provided with a plurality of through holes (4).
5. The head support for fixing the head and accurately measuring the angiography machine according to claim 1, characterized in that: The support mechanisms (2) are located on the left and right sides of the top of the base (3), the plurality of support mechanisms (2) are symmetrically distributed along the left-right direction, and the left and right sides of the limiting mechanism (1) are respectively connected to the support mechanisms (2).
6. The head support for fixing the head and accurately measuring the angiography machine according to claim 1, characterized in that: The base (3), the supporting mechanism (2) and the limiting mechanism (1) are made of X-ray transparent materials.
7. The head support for fixing the head and accurately measuring the angiography machine according to claim 5, characterized in that: The calibration ball (6) is made of a semi-transparent X-ray material.
8. The head support for fixing the head and accurately measuring the angiography machine according to claim 1, characterized in that: The width of the U-shaped groove is 20 cm-30 cm, and the limiting mechanism (1) is inclined at an angle of 15°-45° with the bed surface, and has a thickness of 2 mm-8 mm.
9. The head support for fixing the head and accurately measuring the angiography machine according to claim 1, characterized in that: The number of through holes (4) is 6-20, and the diameter of the through holes (4) is 5 mm-15 mm. The diameter of the calibration ball (6) is 5 mm-20 mm, and the density of the calibration ball (6) is 2.5 g / cm 3 -5g / cm 3 , 1 to 3 calibration balls (6) are provided on the restraining belt (5).