Head fixing device for cerebral angiography in neurology department and angiography system

Abstract

The invention provides a head fixing device for cerebral angiography in the neurology department and an angiography system, and the head fixing device comprises a mounting block which is used for being connected with a mounting groove in the top end of a bed body; the horizontal supporting plate is fixedly connected to the upper end of the mounting block, a first limiting block is fixedly arranged at the upper end of the horizontal supporting plate, a head limiting groove is formed in the front side of the first limiting block, and the rear end in the head limiting groove is used for making contact with the head top of the human body; the two limiting assemblies are symmetrically connected to the left side and the right side of the head limiting groove; the supporting pad is detachably connected to the lower end in the head limiting groove. The supporting pad can be made of different materials, different materials can be selected according to different seasons, and the supporting pad can be detached to be cleaned or replaced; the head is positioned in the front-back direction through the head limiting groove, the left side and the right side of the head of the human body are laterally limited through the two limiting assemblies, and left-right swinging of the head of the human body in the examination process is avoided; and the distance between the two second limiting blocks can be adjusted, so that the requirement for fixing the heads with different head widths is met.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a head fixing device and an angiography system for cerebral angiography in neurology. Background Art

[0002] Cerebral angiography is a new X-ray examination technology that has been widely used in clinical practice since the 1990s. It uses iodine-containing contrast agents injected into the common carotid artery, internal and external carotid arteries, and vertebral arteries to display the morphology, location, distribution, and course of cerebral arteries, returning veins, and venous sinuses at different times through continuous DSA angiography.

[0003] At present, before performing cerebral angiography on a patient, the patient is usually asked to lie flat on the angiography bed and then the patient's head is fixed. The existing head height device, such as CN205144589U, a cerebral angiography head fixing pillow, has the following problems: the size of the head fixing groove of the fixing pillow is fixed, while the width of the head of different people is different, which affects the fixing effect. Summary of the invention

[0004] The present invention provides a head fixing device and an angiography system for cerebral angiography in neurology, which are used to solve the technical problems raised by the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention discloses a head fixation device for cerebral angiography in neurology, comprising:

[0006] A mounting block, the mounting block is used to connect with the mounting groove at the top of the bed;

[0007] A horizontal support plate is fixedly connected to the upper end of the mounting block, a limit block 1 is fixedly arranged on the upper end of the horizontal support plate, a head limit groove is arranged on the front side of the limit block 1, and the rear end of the head limit groove is used to contact the top of the human head;

[0008] Two sets of limiter components are symmetrically connected to the left and right sides of the head limiter groove;

[0009] The support pad is detachably connected to the lower end of the head limiting groove.

[0010] Preferably, the left limiter assembly includes:

[0011] A horizontal screw rod is threadedly connected to the left side wall of the head limiting groove, and the horizontal screw rod passes through the left side of the head limiting groove;

[0012] The second limit block is connected to the upper end of the support pad in a left-right sliding manner, and the right end of the horizontal screw is connected to the left end of the second limit block in a rotational manner.

[0013] An angiography system for neurology cerebral angiography, comprising the head fixing device for neurology cerebral angiography, and also comprising: a bed, a scanning device, the scanning device comprising a detection ray emitting module, a detection ray receiving module, and a C-arm, the detection ray emitting module is located above the bed, the detection ray emitting module is located below the bed, the detection ray emitting module is connected to the upper end of the inner side of the C-arm, the detection ray receiving module is connected to the lower end of the inner side of the C-arm, and the horizontal position of the C-arm is adjusted by a translation mechanism;

[0014] The control device is electrically connected to the detection ray emitting module, the detection ray receiving module, the display and the translation mechanism respectively.

[0015] Preferably, the detection ray receiving module is connected to the control device via a connecting circuit, and the connecting circuit includes: a first conditioning module, a second conditioning module, a third conditioning module, and a fourth conditioning module which are connected in sequence.

[0016] Preferably, the first conditioning module includes: a first diode, the anode of the first diode is connected to the first end of the sixth capacitor, the second end of the sixth capacitor is connected to the detection ray receiving module, the cathode of the second diode is connected to the first end of the sixth capacitor, the anode of the second diode is grounded, one end of the second resistor is connected to the cathode of the second diode, the other end of the second resistor is grounded, the first end of the first resistor is connected to the cathode of the first diode, one end of the fourth capacitor is connected to the cathode of the first diode, the other end of the fourth capacitor is grounded, one end of the second capacitor is connected to the second end of the first resistor, and the other end of the second capacitor is grounded,

[0017] The second conditioning module includes: a second amplifier, a non-inverting input terminal of the second amplifier is connected to the second end of the first resistor, one end of a fifth resistor is connected to the inverting input terminal of the second amplifier, the other end of the fifth resistor is grounded, two ends of a fourth resistor are respectively connected to the inverting input terminal of the second amplifier and the output terminal of the second amplifier, two ends of a first capacitor are respectively connected to the inverting input terminal of the second amplifier and the output terminal of the second amplifier, one end of a fifth capacitor is connected to the output terminal of the second amplifier, and the other end of the fifth capacitor is grounded;

[0018] The third conditioning module comprises: a first amplifier, the output end of the first amplifier is connected to the inverting input end of the first amplifier, the non-inverting input end of the first amplifier is connected to the output end of the second amplifier, and the output end of the first amplifier is connected to the control device;

[0019] The fourth conditioning module includes: a third capacitor, one end of the third capacitor is connected to the output end of the first amplifier, and the other end of the third capacitor is grounded; one end of a third resistor is connected to the output end of the first amplifier, and the other end of the third resistor is grounded.

[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a schematic structural diagram of the head fixing device of the present invention;

[0023] Figure 2 It is a circuit diagram of the connection circuit of the present invention.

[0024] In the figure: 1, mounting block; 2, horizontal support plate; 3, limit block 1; 31, head limit groove; 4, limit assembly; 41, horizontal screw; 42, limit block 2; 5, support pad; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; R5, fifth resistor; C1, first capacitor; C2, second capacitor; C3, third capacitor; C4, fourth capacitor; C5, fifth capacitor; U1, first amplifier; U2, second amplifier; U3, third amplifier; D1, first diode; D2, second diode. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] The present invention provides the following embodiments

[0028] Example 1

[0029] The embodiment of the present invention provides a head fixation device for cerebral angiography in neurology, such as Figure 1-Figure 2 As shown, 1. A head fixation device for cerebral angiography in neurology, characterized in that it includes:

[0030] Mounting block 1, which is used to connect with the mounting groove at the top of the bed;

[0031] A horizontal support plate 2 is fixedly connected to the upper end of the mounting block 1, a limit block 3 is fixedly arranged on the upper end of the horizontal support plate 2, a head limit groove 31 is arranged on the front side of the limit block 3, and the rear end of the head limit groove 31 is used to contact the top of the human head;

[0032] Two sets of limiting components 4 are symmetrically connected to the left and right sides of the head limiting groove 31;

[0033] The support pad 5 is detachably connected to the lower end of the head limiting groove 31 .

[0034] Preferably, the left limiter assembly 4 comprises:

[0035] A horizontal screw rod 41 is threadedly connected to the left side wall of the head limiting groove 31, and the horizontal screw rod 41 passes through the left side of the head limiting groove 31;

[0036] The second limiting block 42 is slidably connected to the upper end of the support pad 5, and the right end of the horizontal screw rod 41 is rotatably connected to the left end of the second limiting block 42.

[0037] The working principle and beneficial effects of the above technical solution are:

[0038] 1. The support pad 5 is detachably connected to the lower end of the head limiting groove 31. The support pad 5 can be made of different materials, and different materials can be selected according to different seasons. The above-mentioned detachability enables the support pad 5 to be disassembled, cleaned or replaced, ensuring the cleaning effect of the supporting part of the human body;

[0039] 2. During inspection, the human head is supported in the head limiting groove 31, and the rear end of the head limiting groove 31 is used to contact the top of the human head to achieve the front-to-back positioning of the head, and then the horizontal screw 41 is controlled to rotate so that the two limiting blocks 42 are close to or away from each other, so that the two limiting blocks 42 limit the left and right sides of the human head, thereby avoiding the left and right swinging of the human head during the inspection process; and the present invention can adjust the distance between the two limiting blocks 42 to meet the head fixation requirements of different head widths.

[0040] The present invention solves the following problems raised in the background technology: the existing head height device, such as CN205144589U, a head fixing pillow for cerebral angiography, has: the size of the head fixing groove of the fixing pillow is fixed, while the width of the head of different people varies, which affects the fixing effect.

[0041] Embodiment 2, the present invention also discloses an angiography system for neurology cerebral angiography, including the head fixing device for neurology cerebral angiography, and also including: a bed, a scanning device, the scanning device including a detection ray emitting module, a detection ray receiving module, and a C-arm, the detection ray emitting module is located above the bed, the detection ray emitting module is located below the bed, the detection ray emitting module is connected to the upper end of the inner side of the C-arm, the detection ray receiving module is connected to the lower end of the inner side of the C-arm, and the horizontal position of the C-arm is adjusted by a translation mechanism;

[0042] The control device is electrically connected to the detection ray emitting module, the detection ray receiving module, the display and the translation mechanism respectively.

[0043] This technology is an existing technology, such as: CN110833426A, CU2553732Y, CN113974663A;

[0044] Embodiment 3, on the basis of embodiment 2, as Figure 2 As shown, the detection ray receiving module is connected to the control device via a connecting circuit, and the connecting circuit includes: a first conditioning module, a second conditioning module, a third conditioning module, and a fourth conditioning module connected in sequence.

[0045] Preferably, the first conditioning module includes: a first diode D1, the positive electrode of the first diode D1 is connected to the first end of the sixth capacitor C6, the second end of the sixth capacitor is connected to the detection ray receiving module, the negative electrode of the second diode D2 is connected to the first end of the sixth capacitor C6, the positive electrode of the second diode D2 is grounded, one end of the second resistor R2 is connected to the negative electrode of the second diode D2, the other end of the second resistor R2 is grounded, the first end of the first resistor R1 is connected to the negative electrode of the first diode D1, one end of the fourth capacitor C4 is connected to the negative electrode of the first diode D1, the other end of the fourth capacitor C4 is grounded, one end of the second capacitor C2 is connected to the second end of the first resistor R1, and the other end of the second capacitor C2 is grounded,

[0046] The second conditioning module includes: a second amplifier U2, a non-inverting input terminal of the second amplifier U2 is connected to the second end of the first resistor R1, one end of a fifth resistor R5 is connected to the inverting input terminal of the second amplifier U2, the other end of the fifth resistor R5 is grounded, two ends of a fourth resistor R4 are respectively connected to the inverting input terminal of the second amplifier U2 and the output terminal of the second amplifier U2, two ends of a first capacitor C1 are respectively connected to the inverting input terminal of the second amplifier U2 and the output terminal of the second amplifier U2, one end of a fifth capacitor C5 is connected to the output terminal of the second amplifier U2, and the other end of the fifth capacitor C5 is grounded;

[0047] The third conditioning module comprises: a first amplifier U1, the output end of the first amplifier U1 is connected to the inverting input end of the first amplifier U1, the non-inverting input end of the first amplifier U1 is connected to the output end of the second amplifier U2, and the output end of the first amplifier U1 is connected to the control device;

[0048] The fourth conditioning module includes: a third capacitor C3, one end of the third capacitor C3 is connected to the output end of the first amplifier U1, and the other end of the third capacitor C3 is grounded; one end of the third resistor R3 is connected to the output end of the first amplifier U1, and the other end of the third resistor R3 is grounded.

[0049] The beneficial effects of the above technical solution are: C6, C2, and C4 are used for waveform conditioning, D2 and D1 are used for current conditioning; U2 is used for primary amplification conditioning, U1 is used for secondary amplification conditioning, C1 is used to improve the stability of U2, C5 is used for waveform conditioning; C3 is used for waveform conditioning; the combination of the above first conditioning module, the second conditioning module, the third conditioning module, and the fourth conditioning module ensures the reliability and stability of the signal transmission of the present invention.

[0050] Embodiment 4, based on any one of embodiments 1-3, the imaging system further comprises a first evaluation device, the first evaluation device operates periodically, and the first evaluation device comprises:

[0051] A simulated dummy, wherein simulated blood vessels are arranged inside the simulated dummy;

[0052] The first control module is used to control the scanning device and the translation mechanism to work with corresponding test operation parameters to perform a scanning test on the scanning simulation dummy; the test operation parameters of the scanning device include: scanning speed, voltage of the X-ray tube, etc.;

[0053] A first acquisition module is used to acquire multiple frames of first scanned images obtained by the scanning device scanning the simulated dummy during the scanning test process;

[0054] The first operating parameter detection module is used to obtain the actual detection values ​​of the key operating parameters of the scanning device (including the surface temperature of the scanning device, the signal strength of the scanning device (such as the signal strength emitted by the detection ray emission module) etc.) during the scanning test;

[0055] A storage module stores a plurality of standard scanned images acquired by the scanning device based on the simulated dummy, wherein the detection value of the first operating parameter detection module is a standard value when acquiring the standard scanned image; when acquiring the standard scanned image, the scanning device and the translation mechanism are controlled to work with corresponding test operating parameters;

[0056] A similarity matching module is used to perform similarity matching between the first scanned image and the corresponding standard scanned image acquired at the same scanning time (the time at the beginning of each scan is taken as 0), so as to obtain the similarity between the first scanned image and the corresponding standard scanned image;

[0057] A first calculation module, used for calculating a first evaluation result based on the similarity matching module and the first operating parameter detection module;

[0058]

[0059] W is the first evaluation result, M is the total number of first scan images acquired by the first acquisition module; Q i is the similarity between the first scanned image of the i-th frame and the corresponding standard scanned image; R is the total number of key operating parameters of the scanning device; C d is the average detection value of the dth key operating parameter of the scanning device obtained by the first operating parameter detection module during the scanning test process; C d0 C d Corresponding standard value; ln is the natural logarithm, e is the natural constant; C d1 The standard deviation of the dth key operating parameter of the scanning device obtained by the first operating parameter detection module during the scanning test process; ∈ 1 ,∈ 2 are respectively the image evaluation weight and the scanning equipment working stability evaluation weight (the value is greater than 0 and less than 1); θ d The evaluation weight (a value greater than 0 and less than 1) of the dth key operating parameter of the scanning device obtained by the first operating parameter detection module;

[0060] The curve construction module is used to construct a similarity curve with the frame number of the first scanning image as the horizontal coordinate and the similarity as the vertical coordinate; wherein, the video of the angiography evaluation process can also be obtained, and the similarity abnormality curve can be determined based on the similarity curve, so as to determine whether the local position of the translation mechanism is abnormal, and the movement state of the specific components at the abnormal time can be determined based on the abnormal video, so as to provide a basis for maintenance.

[0061] The first warning module is used for: W≥W 0 Warning when 0 is the evaluation result threshold; where:

[0062] Remind to check and adjust the scanning equipment; 1 Evaluate thresholds for scanning equipment working stability;

[0063] Remind to check and adjust the installation of the translation mechanism and C-arm, detection ray emitting module, detection ray receiving module and the operating parameters of the translation mechanism based on the curve construction module.

[0064] The beneficial effects of the above technical solution are:

[0065] 1. The first evaluation device works periodically, and may work once a day, or once in the morning when the device is turned on, and once in the afternoon when the device is turned on;

[0066] Due to the long-term use of the equipment, one or more of the following may occur: the position of the C-arm in the translation mechanism, the position of the translation mechanism itself, the position of the detection ray emitting module and the detection ray receiving module in the C-arm, and the abnormal movement of the translation mechanism itself (such as uneven speed caused by stagnation, etc.), which may affect the scanning result of the scanning device, causing the first scanning image actually obtained at a certain scanning time to be different from the standard scanning image (there is a difference in the actual scanning position angle), that is, Larger;

[0067] Or the equipment has been running for a long time, resulting in abnormal operation of the scanning equipment, making the key operating parameters of the scanning equipment abnormal (large fluctuations, i.e. C d1 and / or the actual mean value is significantly different from the standard value, i.e. larger);

[0068] W ≥ W 0 Early warning, Prioritize the inspection and adjustment of the scanning equipment, and then test it again after adjustment to ensure the reliability of the scanning equipment when scanning the human body in each cycle;

[0069] W ≥ W 0 , This indicates that the detection effect is abnormal due to abnormal installation of the translation mechanism and C-arm, detection ray emitting module, detection ray receiving module, and abnormal operation parameters of the translation mechanism. At this time, the installation of the translation mechanism and C-arm, detection ray emitting module, detection ray receiving module, and the operation parameters of the translation mechanism should be adjusted.

[0070] Before imaging real patients in each cycle, we first evaluate based on the above aspects to ensure that the entire equipment works as normally as possible during the current cycle and to ensure the efficiency and effect of imaging.

[0071] 2. It avoids the need to inspect the installation first every time, and conducts targeted inspections based on the actual inspection and evaluation results to ensure inspection efficiency.

[0072] Embodiment 5, based on any one of embodiments 1-4, further comprises a second evaluation device, and each time angiography is performed, the second evaluation device is first controlled to work, and the second evaluation device comprises:

[0073] The second acquisition module is used to acquire the human body information to be imaged, and determine the following based on the human body information to be imaged (which may include the human head size and the amount of contrast agent injected): initial imaging time, imaging evaluation time (the total scanning time can be determined according to the standard scanning speed, minus a certain proportion of the total scanning time), standard operating parameters of the motor of the translation mechanism (which may include the standard speed of the motor, thereby determining the translation mechanism), and standard operating parameters of the imaging device (which may include the standard scanning speed, the voltage of the X-ray tube, etc.);

[0074] The second operating parameter detection module is used to obtain the actual detection values ​​of the key operating parameters of the scanning device during the angiography evaluation time;

[0075] An environmental detection module is used to detect environmental parameters (including ambient temperature and ambient humidity) that may affect the imaging effect at the bed;

[0076] A third operating parameter detection module is used to obtain actual detection values ​​of key operating parameters of the motor of the translation mechanism, where the key operating parameters of the motor of the translation mechanism include: surface temperature of the motor of the translation mechanism (the offset mechanism may be a lead screw type translation mechanism driven by the motor) and rotation speed of the motor of the translation mechanism;

[0077] The second control module is used for controlling the radiography device to work with the standard operating parameters of the radiography device for the radiography evaluation time from the initial radiography time each time radiography is performed, and at the same time, controlling the motor of the translation mechanism to work with the standard operating parameters of the motor of the translation mechanism for the radiography evaluation time, and the second operating parameter detection module and the third operating parameter detection module perform several operations within the radiography evaluation time;

[0078] A second calculation module, used for calculating a continuous contrast assessment coefficient Q based on the environment detection module, the second operation parameter detection module, and the third operation parameter detection module;

[0079]

[0080] X h is the average detection value of the hth key operating parameter of the scanning device obtained by the second operating parameter detection module within the duration of the angiography evaluation; h0 For X h Corresponding standard value; ln is the natural logarithm, e is the natural constant; X h1 The standard deviation of the hth key operating parameter of the scanning device obtained by the second operating parameter detection module within the imaging evaluation time; τ his the evaluation weight (the value is greater than or equal to 0 and less than 1) of the dth key operating parameter of the scanning device obtained by the second operating parameter detection module; T is the total number of key operating parameters of the motor of the translation mechanism obtained by the third operating parameter detection module; Y g is the average detection value of the g-th key operating parameter of the motor of the translation mechanism obtained by the third operating parameter detection module within the angiography evaluation time; g0 Y g Corresponding standard value; Y g1 is the standard deviation of the g-th key operating parameter of the motor of the translation mechanism obtained by the third operating parameter detection module within a preset time length; δ g is the evaluation weight (the value is greater than or equal to 0 and less than 1) of the g-th key operating parameter of the motor of the translation mechanism obtained by the third operating parameter detection module; ω G is the scanning influence coefficient (the value is greater than -1 and less than 1) corresponding to the deviation coefficient of the Gth environmental parameter obtained based on the preset environmental deviation coefficient-influence coefficient table, is the deviation coefficient of the Gth environmental parameter that affects the contrast effect; E G is the actual detection value of the environmental parameter that affects the contrast effect during the contrast evaluation time of the environmental detection module; E G0 For E G Corresponding standard value; μ 2 μ is the quality score of the angiography image acquired by the scanning device within the angiography evaluation time (the existing image quality scoring method can be used, and the score can be determined by combining the similarity between the actual angiography image and the preset evaluation standard image, and the greater the similarity, the higher the score); 1 μ 2 The corresponding preset target value; F is the initial quality assessment state value; γ 1 , γ 2 , γ 3 are the first assessment weight, the second assessment weight, and the third assessment weight (values ​​are greater than 0 and less than 1); H is the comprehensive environmental deviation assessment result;

[0081] The second warning module is used to issue a warning when the continuous contrast assessment coefficient is greater than the contrast assessment coefficient threshold. When the second warning module does not issue a warning, the control device controls the contrast imaging device to continuously scan with the standard operating parameters of the contrast imaging device until the scan of the human head is completed, and at the same time controls the motor of the translation mechanism to operate with the standard operating parameters of the motor of the translation mechanism until the scan of the human head is completed.

[0082] The beneficial effects of the above technical solution are:

[0083] 1. Based on the current human body information to be imaged, determine: initial imaging time (based on the actual injection time, the time when the contrast agent concentration reaches a certain standard is determined as the initial imaging time), imaging evaluation duration, standard operating parameters of the motor of the translation mechanism, and standard operating parameters of the imaging equipment, to ensure that the working parameters are adapted to the human body, and to ensure the evaluation effect and the scanning effect of the actual complete scanning process;

[0084] 2. The second control module is used for each contrast imaging, starting from the initial contrast imaging time, first controlling the contrast imaging device to work with the standard operating parameters of the contrast imaging device for the contrast imaging evaluation time, and at the same time controlling the motor of the translation mechanism to work with the standard operating parameters of the motor of the translation mechanism for the contrast imaging evaluation time; when scanning each patient, firstly perform a short contrast imaging evaluation to determine the current state of the contrast imaging device and the contrast imaging effect, so as to avoid a direct complete scan, which may result in poor accuracy of the scan result due to the state of the contrast imaging device and the contrast imaging effect, and require repeated scanning, which is more harmful to the human body;

[0085] 3. During the contrast assessment, the status of key operating parameters of the scanning equipment is based on (including fluctuation state X h1 and the overall average deviation state ), the influence of the motor of the translation mechanism (including the fluctuating state Y g1 and the overall average deviation state ), and possible impact of environmental parameters As well as some actual evaluation of scanned image quality Comprehensively predict the actual scanning effect. When the actual scanning effect shows an abnormal trend, timely alarm and stop scanning, and remind to replace the instrument for scanning, or scan again after repairing the parts.

[0086] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A head fixation device for cerebral angiography in neurology, characterized in that: include: A mounting block, the mounting block is used to connect with the mounting groove at the top of the bed; A horizontal support plate is fixedly connected to the upper end of the mounting block, a limit block 1 is fixedly arranged on the upper end of the horizontal support plate, a head limit groove is arranged on the front side of the limit block 1, and the rear end of the head limit groove is used to contact the top of the human head; Two sets of limiter components are symmetrically connected to the left and right sides of the head limiter groove; The support pad is detachably connected to the lower end of the head limiting groove.

2. A head fixation device for cerebral angiography in neurology according to claim 1, characterized in that: The left limiter assembly includes: A horizontal screw rod is threadedly connected to the left wall of the head limiting groove, and the horizontal screw rod passes through the left side of the head limiting groove; The second limit block is connected to the upper end of the support pad in a left-right sliding manner, and the right end of the horizontal screw is connected to the left end of the second limit block in a rotational manner.

3. An angiography system for neurology cerebral angiography, comprising a head fixation device for neurology cerebral angiography as claimed in claim 1 or 2, characterized in that: Also includes: A bed and a scanning device, wherein the scanning device comprises a detection ray emitting module, a detection ray receiving module and a C-arm, wherein the detection ray emitting module is located above the bed, the detection ray emitting module is located below the bed, the detection ray emitting module is connected to the upper inner end of the C-arm, the detection ray receiving module is connected to the lower inner end of the C-arm, and the horizontal position of the C-arm is adjusted by a translation mechanism; The control device is electrically connected to the detection ray emitting module, the detection ray receiving module, the display and the translation mechanism respectively.

4. The imaging system for cerebral angiography in neurology according to claim 3, characterized in that: The detection ray receiving module is connected to the control device via a connecting circuit, and the connecting circuit includes: a first conditioning module, a second conditioning module, a third conditioning module, and a fourth conditioning module which are connected in sequence.

5. The imaging system for cerebral angiography in neurology according to claim 4, characterized in that: The first conditioning module includes: a first diode, wherein the anode of the first diode is connected to the first end of the sixth capacitor, the second end of the sixth capacitor is connected to the detection ray receiving module, the cathode of the second diode is connected to the first end of the sixth capacitor, the anode of the second diode is grounded, one end of the second resistor is connected to the cathode of the second diode, the other end of the second resistor is grounded, the first end of the first resistor is connected to the cathode of the first diode, one end of the fourth capacitor is connected to the cathode of the first diode, the other end of the fourth capacitor is grounded, one end of the second capacitor is connected to the second end of the first resistor, and the other end of the second capacitor is grounded; The second conditioning module includes: a second amplifier, a non-inverting input terminal of the second amplifier is connected to the second end of the first resistor, one end of a fifth resistor is connected to the inverting input terminal of the second amplifier, the other end of the fifth resistor is grounded, two ends of a fourth resistor are respectively connected to the inverting input terminal of the second amplifier and the output terminal of the second amplifier, two ends of a first capacitor are respectively connected to the inverting input terminal of the second amplifier and the output terminal of the second amplifier, one end of a fifth capacitor is connected to the output terminal of the second amplifier, and the other end of the fifth capacitor is grounded; The third conditioning module comprises: a first amplifier, the output end of the first amplifier is connected to the inverting input end of the first amplifier, the non-inverting input end of the first amplifier is connected to the output end of the second amplifier, and the output end of the first amplifier is connected to the control device; The fourth conditioning module includes: a third capacitor, one end of the third capacitor is connected to the output end of the first amplifier, and the other end of the third capacitor is grounded; one end of a third resistor is connected to the output end of the first amplifier, and the other end of the third resistor is grounded.

6. The imaging system for cerebral angiography in neurology according to claim 3, characterized in that: The imaging system further comprises a first evaluation device, which operates periodically and comprises: A simulated dummy, wherein simulated blood vessels are arranged inside the simulated dummy; The first control module is used to control the scanning device and the translation mechanism to work with corresponding test operation parameters to perform a scanning test on the scanning simulation dummy; A first acquisition module is used to acquire multiple frames of first scanned images obtained by the scanning device scanning the simulated dummy during the scanning test process; The first operating parameter detection module is used to obtain the actual detection value of the key operating parameters of the scanning device during the scanning test; A storage module stores a plurality of frames of standard scanned images acquired by the scanning device based on the simulated dummy, and a detection value of the first operating parameter detection module when acquiring the standard scanned image is a standard value; A similarity matching module is used to perform similarity matching between the first scanned image and the corresponding standard scanned image acquired at the same scanning time, so as to obtain the similarity between the first scanned image and the corresponding standard scanned image; A first calculation module, used for calculating a first evaluation result based on the similarity matching module and the first operating parameter detection module; W is the first evaluation result, M is the total number of first scan images acquired by the first acquisition module; Q i is the similarity between the first scanned image of the i-th frame and the corresponding standard scanned image; R is the total number of key operating parameters of the scanning device; C d is the average detection value of the dth key operating parameter of the scanning device obtained by the first operating parameter detection module during the scanning test process; C d0 C d Corresponding standard value; ln is the natural logarithm, e is the natural constant; C d1 is the standard deviation of the dth key operating parameter of the scanning device obtained by the first operating parameter detection module during the scanning test process; ∈1 and ∈2 are the image evaluation weight and the scanning device working stability evaluation weight respectively; θ d The evaluation weight of the dth key operating parameter of the scanning device obtained by the first operating parameter detection module; A curve construction module, used to construct a similarity curve with the frame number of the first scanned image as the horizontal coordinate and the similarity as the vertical coordinate; The first warning module is used to: issue a warning when W≥W0; W0 is the evaluation result threshold; where: Remind to check and adjust the scanning equipment; P1 is the threshold for evaluating the working stability of the scanning equipment; Remind to check and adjust the installation of the translation mechanism and C-arm, detection ray emitting module, detection ray receiving module and the operating parameters of the translation mechanism based on the curve construction module.

7. An angiography system for cerebral angiography in neurology according to claim 1 or 6, characterized in that: The second evaluation device is also included. Each time angiography is performed, the second evaluation device is first controlled to work. The second evaluation device includes: The second acquisition module is used to acquire the human body information to be imaged, and determine the initial imaging time, imaging evaluation time, standard operating parameters of the motor of the translation mechanism, and standard operating parameters of the imaging device based on the human body information to be imaged. The second operating parameter detection module is used to obtain the actual detection values ​​of the key operating parameters of the scanning device during the angiography evaluation time; Environmental detection module, used to detect environmental parameters of the bed that affect the imaging effect; A third operating parameter detection module is used to obtain actual detection values ​​of key operating parameters of the motor of the translation mechanism, where the key operating parameters of the motor of the translation mechanism include: surface temperature of the motor of the translation mechanism and rotation speed of the motor of the translation mechanism; The second control module is used for controlling the radiography device to work with the standard operating parameters of the radiography device for the radiography evaluation time from the initial radiography time each time radiography is performed, and at the same time, controlling the motor of the translation mechanism to work with the standard operating parameters of the motor of the translation mechanism for the radiography evaluation time, and the second operating parameter detection module and the third operating parameter detection module perform several operations within the radiography evaluation time; A second calculation module, used to calculate a continuous contrast assessment coefficient Q based on the environment detection module, the second operation parameter detection module, and the third operation parameter detection module; The second warning module is used to issue a warning when the continuous contrast assessment coefficient is greater than the contrast assessment coefficient threshold. When the second warning module does not issue a warning, the control device controls the contrast imaging device to continuously scan with the standard operating parameters of the contrast imaging device until the scan of the human head is completed, and at the same time controls the motor of the translation mechanism to operate with the standard operating parameters of the motor of the translation mechanism until the scan of the human head is completed.

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