CN117045271A - Chest CT shooting auxiliary device and using method thereof - Google Patents
Chest CT shooting auxiliary device and using method thereof Download PDFInfo
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Abstract
The invention provides a chest CT shooting auxiliary device and a using method thereof, wherein the device amplifies the tiny change of the chest through reflecting laser by a reflecting mirror, measures the tiny change of the chest through measuring the light spot displacement and the laser multipoint ranging, simultaneously measures the vibration signal of the chest, judges the state of organs in the chest of a patient based on the measured light spot displacement, the multipoint distance and the vibration signal, prompts the patient and a doctor whether the current patient reaches the shooting condition in the CT shooting process of the corresponding organs, thereby the CT shooting of the corresponding organs can be performed within an ideal time window when the patient reaches the shooting condition, effectively improving the efficiency and the quality of the CT shooting of the patient, avoiding the situation of repeated shooting caused by the substandard shooting condition and the bad shooting quality, reducing the workload of doctors, reducing the radiation exceeding standard caused by the repeated shooting of the patient and improving the efficiency of medical diagnosis.
Description
Technical Field
The invention belongs to the technical field of medical appliances, and relates to a medical radiation auxiliary device, in particular to a chest CT shooting auxiliary device and a using method thereof.
Background
The computerized tomography (Computed Tomography, CT) uses precisely collimated X-ray beam, gamma ray, ultrasonic wave, etc. to scan the cross section around a certain part of human body together with a detector with very high sensitivity. In modern hospital construction, the radiology department is a department integrating examination, diagnosis and treatment, and a plurality of diseases in clinical departments are required to be clearly diagnosed and assisted by the examination of radiology department equipment. The radiology department equipment includes a general radiography machine, a computer radiography system (Computed Radiography, abbreviated as CR), a direct digital radiography system (Digit Radiography, abbreviated as DR), a Computer Tomography (CT), nuclear magnetic resonance (Magnetic Resonance Imaging, abbreviated as MRI), a digital subtraction angiography system (Digital Subtraction Angiography, abbreviated as DSA), and the like. When the shooting device of the radiology department is used for shooting images of organs/tissues of a patient, the patient is generally required to keep still as much as possible, so that the image problems such as residual shadows, blurring and the like caused by the relative movement of the organs/tissues in the pleuroperitoneal cavity and the shooting device can be avoided. For example, when taking a CT of the lung, the patient needs to inhale deeply and hold the CT, so that the lung can be opened as much as possible, the alveoli are filled, the visual field of the lung is clearer, the relative movement of the lung is avoided, and unnecessary blurring artifacts are reduced. When shooting the heart, the normal frequency is between 60 and 100 times because the heart is beating at any moment, the heart beating frequency range is wide, the states of the ventricular atrium and the like are complex, and therefore, the imaging of the heart radiography is difficult. During the shooting process, the patient is required to keep a breath-hold state to reduce the influence of respiration on heart beating, and meanwhile, the rapid shooting is required to be carried out in a special time period of a heartbeat cycle so as to improve the imaging quality of the heart. However, the lack of a device for monitoring the breath-hold state of a patient clinically can hardly quantify the quality of an image picture, and the patient is comprehensively influenced by mood swings, contrast agent medicines and the like, and often the conditions of breath swings, heart rate rapids, arrhythmia and the like are accompanied, so that the breath/heart beat state is difficult to accurately monitor and predict, and efficient imaging of internal organs/tissues is a clinical challenge.
Too short breath-hold time of the patient or organ activity in shooting can cause partial blurring of the acquired image and picture, and if the blurring position is just at the lesion position, the diagnosis of diseases by doctors can be affected. A patient is typically required to hold his breath during chest radiography to prevent breathing from causing image artifacts. Due to individual differences and complexity of patients, the condition of insufficient inspiration often occurs, and the obtained image and picture effect is poor. For example: the method comprises the steps that a lung image picture is shot in a CT room of a radiology department of a certain trimethyl hospital, after a patient scans a positioning image, voice prompts for the first time are "inhalation, shielding" is carried out, the inhalation amount of the patient is 1804mL, and a chest CT image picture is blurred; the second voice prompts that the patient inhales, the patient is shielded, the inhalation amount of the patient is 1872mL, and the chest CT image picture is still blurred; the third voice prompts that the patient inhales, and the patient is shielded, wherein the inhalation volume of the patient is 3945mL, and the chest CT image is clear. It can be seen that due to the lack of real-time monitoring technology for the inspiration degree and breath-holding effect of a patient in clinic, the work efficiency of a clinician is reduced, and the problem of inspiration and breath-holding frequently occurs that a patient needs to rescan a fuzzy or lesion position, and the patient must accept a radiological examination again, which definitely causes potential threat to the life health of the patient. Obviously, the inhalation state of the patient is conveniently and accurately monitored, the interpretation of the lung image result by doctors can be improved, and the clinical diagnosis efficiency is improved.
Compared with pulmonary respiration, the heart is more complex, rapid and non-quietable, the mechanical transmission nonlinearity is more obvious, and the motion state is more difficult to judge and predict. In cardiac and coronary imaging, the patient needs to avoid the influence of respiration on the heart beat as much as possible, shoot in the heart beat period gap, and avoid the influence of non-rhythmic beating process on imaging. The method requires a stricter breath-hold state of a patient, improves hardware parameters such as time resolution of imaging equipment as much as possible, shortens shooting time, monitors the heartbeat state in real time and adjusts the optimal shooting time in time. However, the improvement of parameters and performance of the device is often very difficult, and the improvement can be realized by clinically changing CT devices, which is expensive; since the heart and lung belong to internal organs, real-time monitoring and prediction of the state of motion is difficult.
Currently, there are several types of imaging assistance devices for monitoring the state of the pleuroperitoneal cavity of a patient: 1. barometer type chest belt; 2. an elastometer chest strap; 3. a spirometer gating device; 4. an electrocardiographic gating device. The former two devices are needed to be worn when the patient performs the radioscopy, are fixed on the outer side of the chest of the patient in a contact type binding band mode, detect parameters such as air pressure/elasticity and the like, indirectly obtain the expansion degree (inspiration and breath-hold states) of the chest of the patient, further reflect the chest and abdomen states of the patient, and are commonly used for nuclear Magnetic Resonance (MRI). The contact process between the barometer type/elastometer type chest belt and the skin of the patient improves the infection probability to a certain extent, the operation process is complex, and the use threshold of the patient is improved; the sensor, the circuit, the binding belt and the like have influence on the image quality of a ray scanning area, the requirement on the placement position of the device is improved, and the device is difficult to adapt to complex and changeable clinical environments. The third device requires contact with the patient's mouth/nose and determines the level of inspiration and the breath-hold condition by detecting the amount of lung inspiration. The spirometer type gating device directly detects the spirometry so as to judge the state of the lung, the device is directly communicated with the respiratory tract of a patient in a contact way, the possibility of cross infection is increased, and meanwhile, the cost is increased by the disposable products and disinfection measures. Moreover, the first three devices only reflect the state of the lungs and do not intuitively reflect the state of the heart. In dual source CT (Dual Source Computed Tomography, abbreviated as DSCT), the electrocardiographic gating apparatus provides a control method for scanning the heart in one heartbeat without a wide detector covering the whole heart volume, using only one cardiac cycle of data to reconstruct images, the scanning time is very short, the time resolution of each image is optimal, but the time resolution strongly depends on the relationship between the heart rate and the gantry rotation time, this approach puts high demands on the parameters and performance of the device, which is expensive and cannot meet the clinical demands. Because of arrhythmia, tachycardia and other conditions of clinical patients, the migration of chemical ions and mechanical movement have causal relationship, the electrocardiogram and the actual mechanical movement of the heart have a certain time difference and error, the heart cycle has deviation in actual shooting, the randomness of the shot images is increased, and the shot image has poor quality.
In summary, the above-mentioned several existing auxiliary devices for shooting auxiliary chest CT still have many problems (1. Cross infection, 2. Complex operation mode, low efficiency, 3. Complex equipment principle, high technical threshold, 4. Insufficient stability of electrocardiographic triggering mode, easy influence on image shooting quality, and cause disease diagnosis error of patient), so an auxiliary device capable of providing multi-azimuth detection and predicting the movement state of internal organs and its use method are needed to improve the shooting quality of cardiopulmonary image pictures, reduce the radiation receiving times of patient, and improve the medical diagnosis efficiency.
Disclosure of Invention
In order to solve the problems, the chest CT shooting auxiliary device and the application method thereof are provided, so that the detection of the tiny fluctuation, the breathing state and the like of the chest of a patient is realized, and data are timely fed back to the patient and a doctor, so that the shooting quality of a heart-lung CT image picture is improved, the radiation exceeding standard caused by the repeated shooting of the patient is reduced, and the medical diagnosis efficiency is improved.
In order to achieve the above purpose, the design idea of the invention is as follows:
the patient, through the movements of the muscles of the thoracic cavity and abdominal cavity, causes a change in the state of breath-hold, which normally is manifested by an expansion or contraction of the lungs. Therefore, by detecting minor changes and trends of the thoracic cavity and the abdominal cavity, the states of lung inhalation, respiration and the like are judged/predicted, and the current and predicted breath-holding conditions of patients and doctors are prompted in the CT shooting process. The heart beating and the lung respiration are accompanied by the flow of blood flow and air flow in the flow channel, and the flow can cause mechanical vibration, and the flow speed, the strength and the like react to different vibration signals. Therefore, the heart motion state can be judged through vibration signal identification, and the prediction function can be realized by combining a time sequence signal intelligent processing algorithm. Cardiopulmonary state detection: the motion states of the heart, the lung and the like are restored to the greatest extent by detecting multidimensional sensing information such as the thoracic and abdominal cavity deflection angle, the displacement of a plurality of measuring points, the vibration signal of an organ and the like. Intelligent prediction and feedback correction: the method and the device have the advantages that the prediction at the next moment is carried out based on the historical sensing information, the influence factors in the shooting process are timely fed back to be adjusted, for example, a patient is reminded of keeping a breath-hold state, and according to the measured motion state of the viscera in the chest of the patient, fuzzy pixels of a CT scanning picture can be corrected by utilizing an image super-resolution reconstruction algorithm, imaging quality is improved, and a doctor is assisted in health diagnosis.
According to the optical lever principle, the small deformation of the thoracic cavity can cause the reflection angle of the laser on the reflecting mirror to change, the position change stroke of the reflection light spot can be twice or more of the actual deformation of the thoracic cavity, the small fluctuation of the thoracic cavity can be well amplified, and the detection resolution is improved. Before formal shooting, the patient is subjected to multiple deep breathing exercises, and a maximum/minimum relation model of the maximum/minimum vital capacity of the patient and the maximum/minimum displacement of the reflecting light spot (in a certain direction) is established; and during formal shooting, the coordinate information of the reflection light spots is converted into visual information of the inhalation amount and the breath-holding state of the patient, and the visual information is displayed to the patient and a doctor in real time through an interactive interface, so that the medical diagnosis efficiency is improved.
The main controller can calculate the acceleration according to the coordinate change of the reflected light spot. When the thoracic cavity inspiration reaches the maximum value, the change condition of the acceleration value of the reflection light spot is slowly reduced to 0; when the patient inhales less than full and stops inhaling continuously, the acceleration value of the reflecting light spot does not slowly decrease, but directly changes to 0, and the interactive interface prompts the patient to inhale continuously to complete the breath-hold process.
The laser ranging sensor is placed above the patient, can detect the displacement of the multi-point position of the outline of the pleuroperitoneal cavity, further calculate the volume of the pleuroperitoneal cavity, and restore the three-dimensional outline and the change.
The vibration signal sensor is placed at the back of the patient, can collect vibration signals of organs in the chest, can perform intelligent recognition of heart sound modes, lung sound signals and the like, and further calculates the movement state of the organs.
Based on the feedback control strategy of the time series measured values, correction and prediction of the correct probability of the CT image can be perfected to the greatest extent. At different moments, the obtained data such as the reflected light spot displacement value, the laser measurement value, the vibration signal value and the like have the inherent time-related characteristics. The motion state of the organ has correlation with the image quality, for example, if the motion amplitude of the organ can be determined, the motion amplitude can be corrected through the image, the motion state is closest to a true value to the greatest extent, the CT image blurring is reduced, and the imaging quality is improved. The measured value at the next moment can be predicted on the basis of knowing the movement state of the internal organs at the last moment by using algorithms such as RBF (Radial Basis Function) neural network and the like. According to the predicted numerical value, control of the CT shooting process can be optimized, for example, the moment of starting CT scanning is determined, correction is carried out in the shortest time, influence of arrhythmia and quick heart rate is reduced, and image shooting efficiency is improved.
According to the above inventive concept, the present invention specifically adopts the following technical scheme:
the invention provides a chest CT shooting auxiliary device, which is characterized by comprising: a mounting table for mounting a patient to be tested; the reflecting component is arranged on the chest of the patient and used for reflecting laser; and the detection control assembly comprises a main controller, and a vibration signal sensor, a laser transmitter, a laser receiver, a laser range finder and a display which are electrically connected with the main controller, wherein the vibration signal sensor is arranged on the carrying table and is used for detecting vibration in the chest of a patient lying on the carrying table to obtain corresponding vibration signals, the laser transmitter is used for transmitting laser, the laser receiver is used for receiving reflected laser which is transmitted by the laser transmitter and reflected by the reflection assembly to obtain corresponding reflected laser signals, the laser range finder is used for detecting distances between the laser range finder and a plurality of points on the chest of the patient lying on the carrying table to obtain corresponding distance signals, and the main controller is used for calculating a shooting time window of an organ in the chest of the patient based on the vibration signals, the reflected laser signals and the distance signals and transmitting corresponding signals to the CT equipment.
The chest CT imaging assisting device provided by the present invention may further have a technical feature, wherein the reflection assembly includes: a reflector bracket fixed on the chest of the patient; and a reflecting mirror, which is angularly adjustably mounted on the reflecting mirror support, for reflecting the laser light.
The chest CT photographing auxiliary device provided by the invention can also have the technical characteristics that the reflector bracket is made of a material with the density smaller than that of human bones.
The chest CT imaging assisting device provided by the present invention may further have the technical characteristics that: the fixed bracket is fixed on the ground or a wall; and a display bracket telescopically arranged at the end part of the fixed bracket, wherein the display is arranged on the display bracket, and the display screen faces downwards to the carrying table.
The invention provides a using method of the chest CT shooting auxiliary device, which is characterized by comprising the following steps: disposing the reflective assembly on a chest of a patient lying on the table; the main controller controls the display to display corresponding prompt information to the patient, so as to prompt the patient to perform a plurality of inhalation tests; in the inspiration test process, the vibration sensor collects the vibration signal, the laser receiver collects the reflected laser signal, the laser range finder collects the distance signal, and the main controller calculates reference data of organs in the chest of the patient based on the collected vibration signal, the reflected laser signal and the distance signal, wherein the reference data at least comprises the acceleration of the spot movement of the reflected laser; the main controller controls the display to display corresponding prompt information to the patient, so as to prompt the patient to inhale and hold breath; in the CT shooting process of the viscera, the vibration sensor collects the vibration signals, the laser receiver collects the reflected laser signals, the laser range finder collects the distance signals, and the main controller calculates a collection time window for CT shooting of the viscera based on the collected vibration signals, the reflected laser signals, the distance signals and the reference data and sends corresponding signals to the CT equipment.
The method for using the chest CT shooting auxiliary device is used for assisting when shooting CT images of the lungs of a patient, and can also have the technical characteristics that in the CT shooting process of the lungs, the main controller calculates the current inhalation amount of the patient based on the distance signal, controls the display to display whether the current inhalation amount reaches a preset qualified inhalation amount or not to the patient, and once the current inhalation amount reaches the qualified inhalation amount, the main controller controls the display to display corresponding prompt information to the patient, prompts the patient to hold breath and keep the preset time, and sends corresponding signals entering an acquisition time window to the CT equipment.
The method for using the chest CT photographing auxiliary device provided by the invention is used for assisting in photographing CT images of the lung of a patient, and can be further characterized in that in the process of the inhalation test, the main controller obtains the displacement of the light spot of the reflected laser in each inhalation test and the acceleration based on the collected reflected laser signals, further establishes the breath hold qualified range of the patient, obtains a light spot displacement waveform map based on the collected vibration signals, further obtains a mean filtering waveform map based on the vibration signal waveform map and the light spot displacement waveform map, further predicts the normal waveform map of the patient according to the mean filtering waveform map, and in the process of CT photographing of the lung, the main controller obtains the actual waveform map of the patient based on the collected vibration signals, the reflected laser signals and the distance signals, further judges whether the actual waveform map and the normal waveform map are consistent or not, and when the actual waveform map and the normal waveform map are not consistent, the main controller controls the display to display the abnormal state of the patient in the photographing process to the patient.
The method for using the chest CT photographing auxiliary device provided by the invention is used for assisting in photographing CT images of the heart of a patient, and can be further characterized in that in the process of the inspiration test, the main controller is used for obtaining a normal heart cycle waveform diagram of the patient based on the vibration signal and the reflected laser signal, predicting reference data of the heart beating of the patient based on the normal heart cycle waveform diagram, transmitting the reference data to the CT equipment, so that a doctor sets an optimal acquisition time window in CT photographing of the heart based on the reference data, in the process of photographing of the heart CT, the main controller is used for calculating the current inspiration amount of the patient based on the distance signal, controlling the display to display whether the current inspiration amount reaches a preset qualified amount or not to the patient, once the current inspiration amount reaches the qualified amount, controlling the display to display corresponding prompt information to the patient to hold breath and keep the preset time based on the normal heart cycle waveform diagram, further judging whether the current inspiration amount of the patient enters the optimal acquisition time window based on the vibration signal, the main controller is the optimal acquisition time window and the best acquisition time window, and judging whether the current inspiration amount reaches the optimal acquisition time window is the best acquisition time state based on the laser signal.
The method for using the chest CT photographing auxiliary device provided by the invention is used for assisting in photographing a CT image of a heart of a patient, and can be further characterized in that in the inspiration test process, the main controller obtains frequency and amplitude based on the normal heart cycle waveform diagram, fits the beating frequency and the beating amplitude of the heart of the patient by utilizing a pre-trained RBF neural network based on the frequency and the amplitude, obtains the predicted beating frequency and the beating amplitude, and transmits the predicted beating frequency and the beating amplitude to the CT device, so that the doctor can adjust the preset value of the corresponding optimal acquisition time window based on the beating frequency, the beating amplitude and the photographing part of the heart of the patient, and in the CT photographing process of the viscera, the main controller also corrects pixels in the CT image by utilizing an image super-resolution reconstruction algorithm based on the real-time state data when receiving the CT image of the heart of the patient photographed by the CT device in the optimal acquisition time window, so as to obtain a blurred CT image.
The actions and effects of the invention
According to the chest CT shooting auxiliary device and the using method thereof, the device amplifies the small change of the chest through reflecting laser by the reflecting mirror, measures the small change of the chest through measuring the spot displacement and the laser multipoint ranging, simultaneously measures the vibration signal of the chest, judges the states of organs in the chest of a patient based on the measured spot displacement, the multipoint distance and the vibration signal, prompts the patient and a doctor whether the current patient reaches the shooting condition in the CT shooting process of the corresponding organs, so that the CT shooting of the corresponding organs can be performed within an ideal time window when the patient reaches the shooting condition, the efficiency and the quality of the CT shooting of the patient are effectively improved, the situation that repeated shooting is repeated for many times due to the fact that the shooting condition does not reach the standard and the shooting quality is poor is avoided, the workload of doctors is reduced, the radiation exceeding standard caused by the repeated shooting of the patient is reduced, and the efficiency of medical diagnosis is improved.
Drawings
Fig. 1 is a schematic structural diagram of a chest CT imaging assisting device according to an embodiment of the invention;
FIG. 2 is a flowchart of a method of using a chest CT imaging assisting device during a patient's lung CT imaging process according to a first embodiment of the present invention;
FIG. 3 is a schematic view of a display screen according to a first embodiment of the invention;
FIG. 4 is a schematic view of a display screen according to a first embodiment of the invention;
FIG. 5 is a schematic view of a display screen according to a first embodiment of the invention;
fig. 6 is a flowchart of a method for using the chest CT imaging assisting device in the cardiac CT imaging process of the patient in the second embodiment of the present invention.
Reference numerals:
a chest CT imaging assisting device 100; a mounting table 110; a reflecting assembly 120; a mirror support 121; a mirror 122; a detection control component 130; a vibration signal sensor 131; a fixing bracket 132; a laser emitter 133; a laser receiver 134; a laser rangefinder 135; a main controller 136; a display stand 137; a display 138.
Detailed Description
In order to make the technical means, creation characteristics, achievement of the purposes and effects of the present invention easy to understand, the chest CT imaging assisting device and the using method thereof according to the present invention are specifically described below with reference to the embodiments and the accompanying drawings.
Example 1
The embodiment provides a chest CT shooting auxiliary device and a corresponding using method, and in the embodiment, the device is used for shooting the lung CT of a patient and has an auxiliary effect on shooting the lung CT.
Fig. 1 is a schematic diagram of a chest CT imaging assisting device in the present embodiment.
As shown in fig. 1, the chest CT imaging assisting apparatus 100 includes a table 110, a reflection unit 120, and a detection control unit 130.
The mounting table 110 is used for a patient to lie stably, and a medical bed frame of the prior art can be used. The table 110 is marked with corresponding indication information for indicating the position where the patient should lie.
The reflecting assembly 120 includes a mirror support 121 and a mirror 122.
Wherein the mirror support 121 is made of a material having a density less than that of human bones, and has a certain weight but a small weight. The mirror support 121 is for being fixed to the chest of a patient in a lying state, and the mirror 122 is mounted on the mirror support 121 for reflecting laser light. By such a structure, the fluctuation of the chest of the patient changes the angle of the reflecting mirror 122, so that the angle of the reflected light is changed, and the whole weight of the reflecting assembly 120 is light, and the normal respiration of the patient is not affected.
In this embodiment, the bottom of the mirror support 121 may be fixed to the clothing of the patient that is tightly attached to the chest by using adhesive, and in an alternative, a non-invasive fixing structure such as a suction cup may be disposed on the bottom of the mirror support 121.
The detection control assembly 130 includes a vibration signal sensor 131, a stationary bracket 132, a laser transmitter 133, a laser receiver 134, a laser rangefinder 135, a main controller 136, a display bracket 137, and a display 138. Vibration signal sensor 131, laser transmitter 133, laser receiver 134, laser rangefinder 135, and display 138 are all electrically connected to main controller 136 via respective cables.
Wherein, the vibration signal sensor 131 is installed on the upper surface of the table 110 and is disposed at a position corresponding to the chest of the patient lying flat, for collecting vibration signals in the chest of the patient lying flat at a designated position on the table 110 and transmitting to the main controller 136. When the patient lies on the table 110, the back is in contact with the sensing end of the vibration signal sensor 131. In addition, the patient to be detected should wear a garment made of light and thin materials such as cotton and hemp, and the vibration signal sensor 131 can collect the vibration signals of the internal organs of the chest cavity of the patient through the light and thin materials such as cotton and hemp.
The fixed bracket 132 is an L-shaped bracket, and is fixedly arranged on the ground or a wall surface, and the laser transmitter 133, the laser receiver 134, the laser range finder 135 and the main controller 136 are all arranged on the fixed bracket 132.
The laser emitter 133 is for emitting laser light. The laser receiver 134 is configured to receive reflected laser light emitted by the laser emitter 133 and reflected via the mirror 122.
The laser rangefinder 135 is used to detect the distance from a plurality of predetermined points on the upper surface of the chest of a patient lying in a designated position on the table 110 to the laser rangefinder 135 and transmit to the main controller 136.
The main controller 136 is used for controlling the above-mentioned sensor, the laser emitter, etc., acquiring corresponding signal data collected by the sensor, performing further calculation and analysis based on the signal data, and displaying the calculation and analysis result to the patient lying on the table 110 through the display 137. The specific computational analysis of the various types of signals collected by the master controller 136 will be described in further detail below in connection with specific use procedures.
The display bracket 137 is mounted on an end portion of the fixed bracket 132, extends from the end portion further toward the stage 110, and the display bracket 137 is retractable with respect to the fixed bracket 132. The display 137 is fixed to the display stand 137 with the screen of the display 137 facing downward to the table 110 for the patient to acquire information.
Fig. 2 is a flowchart of a method of using the chest CT imaging assisting apparatus in the lung CT imaging process of the patient in the present embodiment.
As shown in fig. 2, in the process of pulmonary CT imaging, the method for using the chest CT imaging assisting apparatus 100 specifically includes the following steps:
in step S1-1, the doctor lays the patient on the table 110 at a designated position and secures the reflex assembly 120 to the patient' S chest.
Wherein the mirror 122 is first assembled to the mirror support 121 and then the mirror support 12 is fixed to the chest of the patient.
In addition, in step S1-1, the telescoping distance of the display bracket 137 may also be adjusted to adjust the position of the display 137 such that the display 137 is directly above the patient' S line of sight.
In step S1-2, the physician adjusts the firing angle of the laser transmitter 133 via the master controller 136 and manually adjusts the angle of the mirror 122 relative to the mirror support 121 until a spot appears on the screen of the display 138 corresponding to the reflected laser light collected by the laser receiver 134.
That is, the adjustment is made so that the laser light emitted from the laser emitter 133 is approximately at the center of the laser receiver 134 after being reflected by the mirror 122.
Fig. 3 is a schematic view 1 of a display screen in the present embodiment.
As shown in fig. 3, during adjustment, a circle C displayed on the screen of the display 138 corresponds to the sensing range of the laser receiver 134, and when adjustment is completed, a point P will appear within the circle C1, representing the spot of reflected laser light received by the laser receiver 134. After the adjustment is completed, the button B1 can be clicked to start the lung function reference data acquisition program, and the respiration training is started.
In step S1-3, the doctor starts the lung function reference data acquisition program through the main controller 136, and the main controller 136 controls the display 138 to display corresponding prompt information to the patient, so as to prompt the patient to perform inhalation test.
In the inhalation test, a patient needs to inhale according to prompt information and hold breath for a preset time.
In step S1-4, the patient performs a plurality of inhalation tests according to the prompt information displayed on the display 138, the laser receiver 134 collects the reflected laser signals in each inhalation test, the vibration signal sensor 131 collects the vibration signals in each inhalation test, and the main controller 136 performs analysis and calculation based on the collected reflected laser signals and the vibration signals to obtain the reference data of the lung function of the patient.
Specifically, the patient inhales and holds his breath for a period of time according to the prompt information, at this time, the laser receiver 134 collects the position of the light spot of the reflected laser light in this inhalation test, and the main controller 136 calculates the displacement of the light spot of the reflected laser light in this inhalation test based on the collected position of the light spot, so as to establish the qualified breath hold range of the patient and obtain the light spot displacement waveform diagram. After prompting the patient to perform the inhalation test a plurality of times through the display 138, the main controller 136 can obtain a relation model of the maximum/minimum vital capacity of the patient and the maximum/minimum value of displacement in a certain direction of the reflection light spot, and convert the relation model into visual information, and display the visual information to the patient through the display 138.
Meanwhile, the vibration signal sensor 131 collects vibration signals in the chest of the patient, the main controller 136 can obtain a vibration signal waveform diagram based on the collected vibration signals, and further can draw a qualified mean value filtering waveform diagram according to the vibration signal waveform diagram and the light spot displacement waveform diagram, and further can predict and obtain a normal waveform diagram of the patient according to the mean value filtering waveform diagram.
Fig. 4 is a schematic view 2 of a display screen in the present embodiment.
After the breath training is completed, the data D1 for each breath test will be displayed on the screen of the display 138, as shown in FIG. 4. After the breath training is completed, the button B2 can be clicked to start the CT photographing auxiliary program.
In step S1-5, the doctor starts the CT shooting auxiliary program through the main controller 136, and the main controller 136 controls the display 137 to display corresponding prompt information to the patient, so as to prompt the patient to inhale.
In step S1-6, the patient inhales according to the prompt information displayed on the display 138, the laser rangefinder 135 collects distance signals of a plurality of points of the chest outline of the patient, the main controller 136 calculates the current inhalation volume of the patient based on the distance signals, and controls the display 138 to display whether the current inhalation volume reaches the qualified inhalation volume in real time.
Fig. 5 is a schematic view of a display screen in the present embodiment 3.
As shown in FIG. 5, during inspiration of the patient, two concentric circles C2 and C3 are displayed on the screen of display 138, circle C2 corresponding to the current inspiratory volume of the patient, and circle C3 corresponding to the acceptable inspiratory volume, which will become larger as the inspiratory volume of the patient increases. Through this, in shooting process, the patient can learn when this starts to inhale and reach directly perceivedly to whether the current inspiration volume of oneself up to standard is seen conveniently directly perceivedly, thereby makes the patient can reach the required condition of shooting more easily, improves shooting efficiency. The doctor can conduct shooting guidance on the patient more easily.
In step S1-7, the main controller 136 determines whether the current inhalation volume of the patient reaches the acceptable inhalation volume after a predetermined time, and returns to step S1-5 to prompt the patient to inhale again when the determination is negative.
In step S1-8, when the determination in step S1-7 is yes, the main controller 136 controls the display 137 to display a prompt message to the patient prompting the patient to hold his breath and for a predetermined time.
In step S1-9, the main controller 136 determines whether the patient has hold his breath based on the acquired distance signal, and repeatedly performs step S1-9 when the determination is negative.
Step S1-10, when step S1-9 is determined to be yes, the main controller 136 sends a corresponding signal entering the acquisition time window to the control end of the CT device so that the CT device starts image acquisition.
By this, it is ensured that the capturing of the CT of the lungs is started in time when the patient reaches a qualified inspiratory volume and holds his breath, thereby ensuring the quality of the CT image.
Through the above steps, the chest CT imaging assisting device 100 can be used for assisting the lung CT imaging of the patient, so that the efficiency and quality of the lung CT imaging are improved.
In addition, in step S1-10, after the patient holds his breath according to the prompt, the main controller 136 also compares the acquired data of the present inhalation with the previously measured baseline data. As shown in fig. 5, when the patient inhales, the display 138 will display the mark L1 on the screen, and the data prompting the patient to inhale the current time will be compared with the reference data, and after the comparison is completed, the display 138 will display the mark L2 on the screen, and the display prompts the patient whether the state of the patient in the current formal inhalation is normal.
Specifically, the main controller 136 draws an actual waveform of the patient from the data measured at the time of the formal CT photographing, determines whether the actual waveform coincides with the above-described normal waveform, and prompts the patient that the state of the patient is abnormal at the time of the formal photographing if it does not coincide.
In this embodiment, the portions not described in detail are known in the art.
Operation and Effect of embodiment one
According to the chest CT shooting auxiliary device and the using method thereof, the chest CT shooting auxiliary device is used for playing an auxiliary role when shooting a patient lung CT image, the device amplifies small changes of the chest through reflecting laser by the reflecting mirror, measures small changes of the chest through measuring spot displacement and laser multipoint ranging, meanwhile measures vibration signals of the chest, judges the state of the patient lung through measured spot displacement, multipoint distance and vibration signals, prompts a patient and a doctor whether the current patient reaches qualified inhalation amount, the current patient breath-holding condition and the like in the patient lung CT shooting process, so that lung CT shooting can be performed in an ideal time window after the patient reaches the qualified inhalation amount and holds breath, the efficiency and quality of lung CT shooting are effectively improved, the situation that repeated shooting is repeated for many times due to substandard shooting conditions and poor shooting quality is avoided, the workload of the doctor can be reduced, the radiation superscale of the patient due to repeated shooting is reduced, and the medical diagnosis efficiency is improved.
< example two >
The present embodiment provides a chest CT imaging assisting device and a corresponding method of use, and in the present embodiment, the same components as those in the first embodiment are given the same reference numerals and corresponding descriptions are omitted compared with the first embodiment.
The difference from the first embodiment is that in this embodiment, the device is used for assisting in taking a cardiac CT of a patient.
Fig. 6 is a flowchart of a method of using the chest CT imaging assisting device in the cardiac CT imaging of a patient in the present embodiment.
As shown in fig. 6, in the process of cardiac CT imaging of a patient, the method for using the chest CT imaging assisting apparatus 100 specifically includes the following steps:
in step S2-1, the doctor lays the patient on the table 110 at a designated position and fixes the reflecting assembly 120 on the chest of the patient.
In step S2-2, the doctor adjusts the emission angle of the laser emitter 133 by the main controller 136 and manually adjusts the angle of the mirror 122 with respect to the mirror support 121 until a spot corresponding to the reflected laser light collected by the laser receiver 134 appears on the screen of the display 138.
In step S2-3, the doctor starts the lung function reference data acquisition program through the main controller 136, and the main controller 136 controls the display 138 to display corresponding prompt information to the patient, so as to prompt the patient to perform inhalation test.
In step S2-4, the patient performs a plurality of inspiration tests according to the prompt information displayed on the display 138, the laser receiver 134 collects the reflected laser signals in each inspiration test, the vibration signal sensor 131 collects the vibration signals in each inspiration test, and the main controller 136 performs analysis and calculation based on the collected reflected laser signals and the vibration signals, so as to obtain a waveform diagram of the normal heart cycle of the patient.
The main controller 136 obtains a reflected light spot displacement waveform map based on the collected reflected laser signals, obtains a vibration signal waveform map based on the collected vibration signals, performs mean filtering on the two waveform maps to obtain a waveform map after mean filtering, and records the waveform map; further, whether the average value filtered waveform obtained by the multiple inhalation tests is smaller in error or not (namely, the error between the waveform is in a preset threshold range) is judged, when the judgment is negative, the inhalation test is carried out again to acquire the waveform again, and when the judgment is positive, average value filtering is carried out on all the recorded average value filtered waveform again, so that a waveform capable of reflecting the normal heart cycle of a patient is obtained.
In step S2-5, the main controller 136 predicts the reference data of the heart beat of the patient based on the waveform diagram of the normal heart cycle of the patient, and transmits to the control end of the CT apparatus, so that the doctor sets the optimal acquisition time window in the cardiac CT photographing based on the reference data.
The main controller 136 obtains the frequency v and the amplitude f of the waveform diagram based on the waveform diagram of the normal heart cycle of the patient, and fits the beating frequency and the amplitude of the heart of the patient by using the pre-trained RBF neural network based on the frequency v and the amplitude f to obtain the predicted beating frequency and the amplitude of the heart. Finally, the predicted heart beat frequency and amplitude are transmitted to the control end of the CT equipment.
The different parts of the heart are imaged by the CT equipment, and the optimal acquisition time windows are not necessarily the same, so that after the reference data are transmitted to the control end of the CT equipment by the step S2-5, a doctor can adjust the preset value of the corresponding optimal acquisition time window according to the reference data and the shooting part of the current patient.
In step S2-6, the doctor starts the CT imaging assisting program through the main controller 136, and the main controller 136 controls the display 137 to display the corresponding prompt information to the patient, so as to prompt the patient to inhale.
In step S2-7, the patient inhales according to the prompt information displayed on the display 138, the laser rangefinder 135 collects distance signals of a plurality of points of the chest outline of the patient, the main controller 136 calculates the current inhalation volume of the patient based on the distance signals, and controls the display 138 to display whether the current inhalation volume reaches the qualified inhalation volume in real time.
In step S2-8, the main controller 136 determines whether the current inhalation volume of the patient reaches the acceptable inhalation volume after a predetermined time, and returns to step S2-6 to prompt the patient to inhale again when the determination is negative.
In step S2-9, when the determination in step S2-8 is yes, the main controller 136 controls the display 137 to display a prompt message to the patient, prompting the patient to hold his breath for a predetermined time.
In step S2-10, the main controller 136 calculates real-time status data of the heart of the patient based on the collected reflected laser signal, vibration signal and distance signal, and determines whether the next time enters an optimal collection time window for photographing a specific part of the heart of the patient based on the real-time status data and the reference data, and if not, repeatedly performs step S2-10.
The main controller 136 can infer the real-time state of the heart of the patient based on the obtained reflected light spot displacement waveform diagram, the laser ranging value, the vibration signal, and the like, and determine whether the heart enters the optimal acquisition time window for capturing the specific part of the heart of the patient at the next moment in combination with the heart beating frequency and the amplitude predicted in the respiratory training stage, and if the obtained real-time heart beating frequency and the amplitude are consistent with or closest to the predicted state at the moment before the optimal acquisition time window, determine that the heart is about to enter the optimal acquisition time window of the specific part of the heart of the patient.
Step S2-11, when the step S2-10 is yes, the main controller 136 sends a corresponding signal about to enter the optimal acquisition time window to the control end of the CT device so that the CT device starts image acquisition.
After receiving the signal, the control end of the CT apparatus may automatically turn on the X-ray irradiation to perform image acquisition of the heart of the patient, and after the optimal acquisition time window is finished, the control end of the CT apparatus will automatically turn off the X-ray irradiation to stop image acquisition, and wait for the next signal to perform image acquisition again in the next optimal acquisition time window.
By acquiring images of the heart of a patient in the optimal acquisition time windows of a plurality of different cardiac cycles, movement artifacts in the CT image, which are generated due to the reasons of arrhythmia, tachycardia and the like of the patient, can be reduced, and the imaging definition of the CT image can be improved.
In addition, the CT apparatus captures a CT image of the heart of the patient within the optimal acquisition time window, and then transmits the CT image to the main controller 136, and when the main controller 136 receives the CT image, based on the detection result (including the detected real-time state data of the heart), the image super-resolution reconstruction algorithm is used to correct the blurred pixels in the CT image, so as to obtain a clearer CT image.
Through the above steps, the chest CT imaging assisting apparatus 100 can assist the cardiac CT imaging of the patient, and the efficiency and quality of cardiac CT image imaging can be improved.
In this embodiment, other structures are the same as those in the first embodiment, and thus a description thereof will not be repeated.
The actions and effects of the second embodiment
According to the chest CT shooting auxiliary device and the using method thereof, the chest CT shooting auxiliary device is used for playing an auxiliary role when a heart CT image of a patient is shot, the device amplifies small changes of the chest through reflecting laser by the reflecting mirror, measures small changes of the chest through measuring spot displacement and laser multipoint ranging, meanwhile measures vibration signals of the chest, judges states of the chest and the heart of the patient through measured spot displacement, multipoint distance and vibration signals, prompts the patient and a doctor whether the current patient achieves qualified inhalation amount, current patient breath-holding condition, patient heart beating condition, prediction condition of patient heart beating and the like in the lung CT shooting process of the patient, so that the heart CT shooting can be performed in an optimal time window when a specific part of the heart of the patient achieves an ideal state after the patient achieves qualified inhalation amount and holds breath, efficiency and quality of the heart CT shooting of the patient are effectively improved, the situation that repeated shooting is repeated for many times due to the fact that shooting conditions are not up to standard and shooting quality is not good is avoided, the workload of the doctor can be reduced, and the efficiency of medical diagnosis is improved.
In the embodiment, when the CT device shoots a CT image of the heart of the patient in the optimal acquisition time window and transmits the CT image to the main controller, the main controller corrects the blurred pixel points in the CT image based on the detection result, so that the intelligent correction of the CT image can be realized, a clearer CT image can be obtained, and a doctor can be better assisted in diagnosis.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the subject matter disclosed. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that this description is not intended to limit the invention. On the contrary, the exemplary embodiments are intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the detailed description of the exemplary embodiments, numerous specific details are set forth in order to provide a thorough understanding of the claimed invention. It will be understood by those skilled in the art, however, that the various embodiments may be practiced without these specific details.
Although the features and elements of the exemplary embodiments are described in the embodiments in particular combinations, each feature and element can be used alone without the other features and elements of the embodiments or in combination or without the other features and elements disclosed herein.
This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with the structural elements recited in the literal language of the claims.
Claims (9)
1. A chest CT imaging assisting apparatus, comprising:
a mounting table for mounting a patient to be tested;
the reflecting component is arranged on the chest of the patient and used for reflecting laser; and
The detection control component comprises a main controller, and a vibration signal sensor, a laser transmitter, a laser receiver, a laser range finder and a display which are electrically connected with the main controller,
wherein the vibration signal sensor is arranged on the carrying table and is used for detecting the vibration in the chest cavity of the patient lying on the carrying table to obtain a corresponding vibration signal,
the laser transmitter is used for transmitting laser light,
the laser receiver is used for receiving the reflected laser emitted by the laser emitter and reflected by the reflecting component to obtain a corresponding reflected laser signal,
the laser range finder is used for detecting the distance between the laser range finder and a plurality of points on the chest of the patient lying on the carrying table to obtain corresponding distance signals,
the main controller calculates a photographing time window of an organ in the chest of the patient based on the vibration signal, the reflected laser signal, and the distance signal, and transmits a corresponding signal to a CT apparatus.
2. The chest CT imaging assisting apparatus according to claim 1, wherein:
wherein the reflection assembly comprises:
a reflector bracket fixed on the chest of the patient; and
And the reflecting mirror is installed on the reflecting mirror bracket in an angle adjustable way and is used for reflecting laser.
3. The chest CT imaging assisting apparatus according to claim 2, wherein
Wherein the reflector holder is made of a material having a density less than that of human bones.
4. The chest CT imaging assisting apparatus according to claim 1, further comprising:
the fixed bracket is fixed on the ground or a wall; and
a display bracket telescopically arranged at the end part of the fixed bracket, the display is arranged on the display bracket,
wherein the display screen is directed to the lower stage.
5. A method of using the chest CT imaging assisting device according to any one of claims 1 to 4, comprising the steps of:
disposing the reflective assembly on a chest of a patient lying on the table;
the main controller controls the display to display corresponding prompt information to the patient, so as to prompt the patient to perform a plurality of inhalation tests;
in the inspiration test process, the vibration sensor collects the vibration signal, the laser receiver collects the reflected laser signal, the laser range finder collects the distance signal, and the main controller calculates reference data of an organ in the chest of the patient based on the collected vibration signal, the reflected laser signal and the distance signal, wherein the reference data at least comprises acceleration when a light spot of the reflected laser moves;
The main controller controls the display to display corresponding prompt information to the patient, so as to prompt the patient to inhale and hold breath;
in the CT shooting process of the viscera, the vibration sensor collects the vibration signals, the laser receiver collects the reflected laser signals, the laser range finder collects the distance signals, and the main controller calculates a collection time window for CT shooting of the viscera based on the collected vibration signals, the reflected laser signals, the distance signals and the reference data and sends corresponding signals to the CT equipment.
6. The method of using a chest CT imaging assisting apparatus according to claim 5, for assisting in imaging CT images of the patient's lungs, wherein:
wherein, in the CT shooting process of the lung, the main controller calculates the current inhalation amount of the patient based on the distance signal and controls the display to display whether the current inhalation amount reaches the preset qualified inhalation amount or not to the patient,
once the current inspiratory volume reaches the acceptable inspiratory volume, the main controller controls the display to display corresponding prompt information to the patient, prompts the patient to hold breath and keep for a preset time, and sends corresponding signals entering an acquisition time window to the CT equipment.
7. The method of using a chest CT imaging assisting device according to claim 6, wherein:
wherein in the process of the inspiration test, the main controller obtains the displacement size and the acceleration of the light spot of the reflected laser in each inspiration test based on the collected reflected laser signals, further establishes the breath-hold qualified range of the patient, obtains a light spot displacement waveform diagram, obtains a vibration signal waveform diagram based on the collected vibration signals, further obtains a mean value filtering waveform diagram according to the vibration signal waveform diagram and the light spot displacement waveform diagram, further predicts the normal waveform diagram of the patient according to the mean value filtering waveform diagram,
in the CT shooting process of the lung, the main controller also obtains an actual waveform diagram of the patient based on the acquired vibration signal, the reflected laser signal and the distance signal, judges whether the actual waveform diagram and the normal waveform diagram are consistent, and when the actual waveform diagram and the normal waveform diagram are inconsistent, the main controller controls the display to display abnormal state of the patient in the shooting process to the patient.
8. The method of claim 5, wherein the chest CT imaging assisting device is configured to assist in taking CT images of a heart of a patient, and wherein:
Wherein during the inspiration test, the main controller obtains a normal heart cycle waveform diagram of the patient based on the vibration signal and the reflected laser signal, predicts reference data of the heart beat of the patient based on the normal heart cycle waveform diagram, and transmits the reference data to the CT device, so that a doctor sets an optimal acquisition time window in CT photographing of the heart based on the reference data,
during CT imaging of the heart, the main controller calculates a current inspiratory volume of the patient based on the distance signal and controls the display to the patient whether the current inspiratory volume reaches a predetermined qualified inspiratory volume,
once the current inspiratory volume reaches the acceptable inspiratory volume, the master controller controls the display to display corresponding prompt information to the patient, prompt the patient to hold breath and keep for a preset time,
further, the main controller calculates real-time state data of the heart of the patient based on the acquired vibration signal, the reflected laser signal and the distance signal, judges whether to enter an optimal acquisition time window for shooting a specific part of the heart at the next moment based on the real-time state data and the reference data, and sends a signal about to enter the optimal acquisition time window to the CT equipment when the judgment is yes.
9. The method of using a chest CT imaging assisting device according to claim 8, wherein:
wherein in the inspiration test process, the main controller acquires frequency and amplitude based on the normal heart cycle waveform diagram, fits the beating frequency and the beating amplitude of the heart of the patient by utilizing a pre-trained RBF neural network based on the frequency and the amplitude, obtains the predicted beating frequency and the predicted beating amplitude, and transmits the predicted beating frequency and the predicted beating amplitude to the CT equipment so that the doctor can adjust the preset value of the corresponding optimal acquisition time window based on the beating frequency, the beating amplitude and the shooting part of the heart of the patient,
and in the CT shooting process of the viscera, the main controller corrects blurred pixel points in the CT image by utilizing an image super-resolution reconstruction algorithm based on the real-time state data when receiving the CT image of the heart of the patient shot by the CT equipment in the optimal acquisition time window so as to obtain a clear CT image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311019803.7A CN117045271A (en) | 2023-08-14 | 2023-08-14 | Chest CT shooting auxiliary device and using method thereof |
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