A nuclear medicine diagnosis and treatment area radiation dose intelligent detection terminal and method

Abstract

The invention discloses an intelligent detection terminal for radiation dose in a nuclear medicine diagnosis and treatment area and a method thereof. The terminal comprises: a nuclear detection module, a central control module and a peripheral module; the nuclear detection module is used for detecting the radiation dose in the nuclear medicine diagnosis and treatment area, and sending the detected electrical signal to the central control module; the central control module is used for processing and analyzing the electrical signal data, and generating corresponding control instructions according to the analysis results; the peripheral module is used for receiving the control instructions sent by the central control module, and completing corresponding operations according to the control instructions; the method for processing data is to perform intelligent smoothing processing on the count rate through a sliding window; the invention can effectively realize dynamic monitoring of the radiation dose in the nuclear medicine diagnosis and treatment area and radiation safety early warning, and the method can achieve the purpose of dynamically elastically increasing and decreasing sample data, effectively filter the instantaneous distortion value, and improve the corresponding sensitivity of the detection data.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear medicine diagnosis and treatment area radiation detection, and more specifically to a nuclear medicine diagnosis and treatment area radiation dose intelligent detection terminal and method thereof. Background Art

[0002] With the continuous improvement of medical standards, nuclear medicine, as a new discipline that uses nuclear technology to diagnose, treat and study diseases, has been widely used. For example, modern nuclear medicine diagnostic and treatment instruments such as X-ray, CT, MRI, PETCT, and Gamma Knife play an important role in auxiliary diagnosis and treatment of malignant tumors.

[0003] According to reports from the International Atomic Energy Agency (IAEA) and the World Health Organization (WHO), about 80% to 90% of all artificial radionuclides produced in the world are used in medicine. Medical accelerators account for about half of the total number of accelerators in the world, and the situation in my country is very similar. For the purpose of diagnostic examination or treatment, in radiodiagnosis, radiotherapy and this medicine, the examinee or patient is intentionally exposed to radiation or radionuclides and the medical exposure is given to humans (0.5 to 2.0) mSv / a (milliSievert / year), which is many times higher than the dose caused by the normal operation of nuclear power plants (1 to 200) × 10-3 mSv / a (near and far). So far, the medical exposure dose accounts for more than 90% of the dose caused by all artificial radiation sources, so it is very important to strengthen the radioactive health protection work in medical exposure.

[0004] At present, in clinical diagnosis and treatment practice, the radiation protection measures taken for medical staff engaged in nuclear medicine and patients receiving radioactive nuclear medicine diagnosis and treatment are relatively weak; at the same time, the radiation dose monitoring system equipped in the radioactive diagnosis and treatment area is relatively simple in function and not mature enough; the relevant diagnosis and treatment work is mainly guided and carried out through nuclear medicine related theories and the personal experience of medical staff.

[0005] Therefore, proposing an intelligent detection terminal and method for radiation dose in nuclear medicine diagnosis and treatment areas capable of intelligent real-time monitoring is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0006] In view of this, the present invention provides a nuclear medicine diagnosis and treatment area radiation dose intelligent detection terminal and method thereof. The purpose of the present invention is to realize dynamic monitoring of radiation dose and radiation safety early warning in the nuclear medicine diagnosis and treatment area, and the method in the present invention can achieve the purpose of dynamically elastically increasing or decreasing sample data, effectively filter instantaneous distortion values, and improve the corresponding sensitivity of detection data.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] An intelligent detection terminal for radiation dose in nuclear medicine diagnosis and treatment area, which communicates with a remote server, comprises: a nuclear detection module, a central control module and a peripheral module;

[0009] The nuclear detection module is connected to the central control module and the power supply module respectively, and the central control module is connected to the peripheral module and the power supply module respectively;

[0010] The nuclear detection module is used to detect the radiation dose in the nuclear medicine diagnosis and treatment area and send the detected electrical signal to the central control module;

[0011] The central control module is used to process and analyze the electrical signal data and generate corresponding control instructions according to the analysis results;

[0012] The peripheral module is used to receive the control instructions sent by the central control module and complete corresponding operations according to the control instructions.

[0013] Preferably, the nuclear detection module includes a dual-path detector and a signal amplifier;

[0014] The dual-path detector is used to detect the radiation dose in the nuclear medicine diagnosis and treatment area, obtain the nuclear radiation dose electrical signal, and send it to the signal amplifier;

[0015] The signal amplifier is used to amplify the received electrical signal and send the processed electrical signal to the central control module.

[0016] Preferably, the nuclear detection module further includes a high voltage unit, and the dual-path detector includes a silicon photodiode and a GM counter tube;

[0017] The high voltage unit is used to supply power to the GM counter tube;

[0018] The silicon photodiode and the GM counter tube are both used to detect the radiation dose in the nuclear medicine diagnosis and treatment area and automatically switch according to the detected radiation dose. When the radiation dose is low, the silicon photodiode is used for detection and the GM counter tube compensates for the counting. When the radiation dose is high, the silicon photodiode is turned off and the GM counter tube is kept working.

[0019] Preferably, the central control module includes an AD / DA converter, a microcontroller and an internal memory; wherein the signal amplifier is connected to the AD / DA converter, and the AD / DA converter, the microcontroller and the internal memory are connected in sequence;

[0020] The AD / DA converter is used to realize mutual conversion between analog and digital electrical signals;

[0021] The microcontroller is used to complete the setting of the initial parameters of the peripheral module, analyze the converted data, send the acquired data to the internal memory and the remote server respectively, and send corresponding control instructions to the peripheral module according to the analysis results;

[0022] The internal memory is used to permanently store operating parameters and temporarily store monitoring data, and automatically clears part of the historical data stored in an earlier time period when the monitoring data storage volume exceeds a set upper capacity limit.

[0023] Preferably, the peripheral module includes a display unit, an alarm unit, a status indication unit and a communication unit; the display unit, the alarm unit, the status indication unit and the communication unit are all connected to the microcontroller;

[0024] The display unit is used to control and display real-time data and data change curve graphs;

[0025] The alarm unit is used to realize an alarm when receiving an alarm indication signal;

[0026] The state indication unit is used to complete the indication of the working state of the detection terminal;

[0027] The communication unit is used to establish a data transmission link and send the monitored data to the remote server and receive the parameter setting instructions sent by the control background, and send the received parameter setting instructions to the microcontroller.

[0028] Preferably, the peripheral module further includes a housing, an external display screen, a status indicator light, a buzzer and a wifi antenna;

[0029] An external display screen is installed on the front of the shell, the status indicator light is arranged below the external display screen, the buzzer is installed on the back of the shell, and a hidden two-terminal power plug is also arranged on the back of the shell;

[0030] The external display screen is electrically connected to the display unit, the status indicator light is electrically connected to the status indication unit, the buzzer is electrically connected to the alarm unit, and the communication unit is electrically connected to the wifi antenna;

[0031] A heat dissipation window and a power switch are arranged on the side of the shell.

[0032] Preferably, it also includes a power supply module for supplying power to the microcontroller and the high-voltage unit;

[0033] The power supply module includes a power supply, a charging unit and a lithium battery;

[0034] The power source and the lithium battery are both connected to the power switch, the charging unit is connected to the power source and the lithium battery, and the power switch is connected to the power source and the lithium battery.

[0035] A method for intelligently detecting radiation dose in a nuclear medicine diagnosis and treatment area, comprising the following contents:

[0036] The nuclear detection module collects data and sends the data to the central control module, which processes and analyzes the received data and generates corresponding control instructions according to the analysis results;

[0037] The method for processing the data is to perform intelligent smoothing of the count rate through a sliding window, and the specific steps include:

[0038] S1, initialization of the sliding window;

[0039] S2, fill the new data entering the sliding window into the tail of the sliding window, and remove the first data at the head of the sliding window;

[0040] S3. Calculation as the counting rate corresponding to the current dose; m is the number of data entering the sliding window;

[0041] S4. When the incoming data fills the sliding window and replaces all the initial data, the consistency evaluation standard of each element data in the sliding window is calculated:

[0042] Where: 1≤i≤n, n=window size L w ,

[0043] S5. Calculate ε in the sliding window i >ε ctl The cumulative number of is obtained to obtain the total consistency evaluation amount α;

[0044] When α ≥ 5%, the sliding window size L w Adjust to L new =L 0 -Δ, and queue the Δ elements at the head of the sliding window, and calculate the sum of the data in the remaining elements in the sliding window: As the counting rate corresponding to the current dose;

[0045] When α<5%, the sliding window size L w Adjust to L new =L 0 +Δ, until the sliding window is filled, calculate the sum of the data in the remaining elements in the window: As the counting rate corresponding to the current dose;

[0046] Among them, ε ctl is the control value of the consistency assessment standard, 1≤i≤n, n=window size L w , m = window size L new ;

[0047] S6. As data continues to enter, the calculation operations of steps S4 and S5 are repeated. When the size of the window L w Reach L 0 -Δ or L 0 +Δ boundary, no longer L w Further adjustments.

[0048] Preferably, the peripheral module receives the control instruction sent by the central control module, and completes the corresponding operation according to the control instruction.

[0049] It can be seen from the above technical solution that, compared with the prior art, the present invention discloses a nuclear medicine diagnosis and treatment area radiation dose intelligent detection terminal and method thereof. The beneficial effects of adopting the above technical solution are:

[0050] First, the detection terminal in the present invention combines the actual needs of the current nuclear medicine field for regional monitoring technology and applications, and comprehensively uses nuclear detection technology and wireless data transmission technology to effectively realize dynamic monitoring of radiation doses and radiation safety warnings in the nuclear medicine diagnosis and treatment area, and can make the monitoring and supervision of occupational and non-occupational radioactive exposure more transparent, which plays an important role in improving the level of radioactive diagnosis and treatment, reducing unnecessary radiation, and protecting the health and safety of medical staff and patients.

[0051] In addition, the method disclosed in the present invention involves a content of processing data samples. Through statistical analysis of the data samples, the spatial capacity of the sample data participating in the statistical calculation is dynamically adjusted according to the expected value and the degree of data consistency, thereby achieving the purpose of dynamically and flexibly increasing or decreasing the sample data; the advantages of the rolling average method in data smoothness can be fully utilized to effectively filter out instantaneous distortion values. At the same time, according to the statistical results of the sample data, the size of the sliding window is dynamically adjusted to ensure that the data peak (including data between the peak and the trough of the sample data) will not be over-smoothed and filtered out. It can quickly reflect the trend of overall data changes (such as: an upward or downward trend) while ensuring the smoothness and stability of the data, as well as the purpose of quickly detecting out-of-limit data, thereby improving the sensitivity of the monitoring data response, and further improving the practicality of the method disclosed in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0053] Figure 1 The accompanying drawing is a diagram showing the overall framework structure of a nuclear medicine diagnosis and treatment area radiation dose intelligent detection terminal provided by the present invention;

[0054] Figure 2 The accompanying drawing is a front view of a nuclear medicine diagnosis and treatment area radiation dose intelligent detection terminal provided by the present invention;

[0055] Figure 3 The accompanying drawing is a rear view of a nuclear medicine diagnosis and treatment area radiation dose intelligent detection terminal provided by the present invention;

[0056] Figure 4 The accompanying drawing is a flow chart of a data processing method in a method for intelligently detecting radiation dose in a nuclear medicine diagnosis and treatment area provided by the present invention;

[0057] 1-wifi antenna, 2-power switch, 3-external display screen, 4-status indicator light, 5-heat dissipation window, 6-buzzer, 7-hidden two-pin power plug. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] The embodiment of the present invention discloses a nuclear medicine diagnosis and treatment area radiation dose intelligent detection terminal, which communicates with a remote server, including: a nuclear detection module, a central control module and a peripheral module;

[0060] The nuclear detection module is connected to the central control module and the power supply module respectively, and the central control module is connected to the peripheral module and the power supply module respectively;

[0061] The nuclear detection module is used to detect the radiation dose in the nuclear medicine diagnosis and treatment area and send the detected electrical signal to the central control module;

[0062] The central control module is used to process and analyze the electrical signal data and generate corresponding control instructions based on the analysis results;

[0063] The peripheral module is used to receive the control instructions sent by the central control module and complete the corresponding operations according to the control instructions.

[0064] In order to further implement the above technical solution, the nuclear detection module includes a dual-path detector and a signal amplifier;

[0065] The dual-channel detector is used to detect the radiation dose in the nuclear medicine diagnosis and treatment area, obtain the nuclear radiation dose electrical signal, and send it to the signal amplifier;

[0066] The signal amplifier is used to amplify the received electrical signal and send the processed electrical signal to the central control module.

[0067] In order to further realize the above technical solution, the nuclear detection module also includes a high voltage unit, and the dual-path detector includes a silicon photodiode and a GM counter tube;

[0068] The high voltage unit is used to power the GM counter tube;

[0069] Both silicon photodiodes and GM counter tubes are used to detect radiation doses in nuclear medicine diagnosis and treatment areas and automatically switch according to the detected radiation dose. When the radiation dose is low, the silicon photodiode is used for detection and the GM counter tube compensates for the count. When the radiation dose is high, the silicon photodiode is turned off and the GM counter tube is kept working.

[0070] It needs further explanation:

[0071] During the detection process, the silicon photodiode and the GM counter tube complement each other and can automatically switch according to the level of the detection dose;

[0072] In order to further implement the above technical solution, the central control module includes an AD / DA converter, a microcontroller and an internal memory; wherein the signal amplifier is connected to the AD / DA converter, and the AD / DA converter, the microcontroller and the internal memory are connected in sequence;

[0073] AD / DA converter is used to realize the mutual conversion between analog and digital electrical signals;

[0074] The microcontroller is used to complete the setting of the initial parameters of the peripheral module and analyze the converted data. At the same time, the acquired data is sent to the internal memory and the remote server respectively, and the corresponding control instructions are sent to the peripheral module according to the analysis results;

[0075] The internal memory is used to permanently store operating parameters and temporarily store monitoring data, and when the monitoring data storage volume exceeds the set capacity limit, part of the historical data stored in the earlier time period is automatically cleared.

[0076] In order to further implement the above technical solution, the peripheral module includes a display unit, an alarm unit, a status indication unit and a communication unit; the display unit, the alarm unit, the status indication unit and the communication unit are all connected to the microcontroller;

[0077] The display unit is used to control and display real-time data and data change curve graphs;

[0078] The alarm unit is used to realize an alarm when receiving an alarm indication signal;

[0079] The status indication unit is used to complete the indication of the working status of the detection terminal;

[0080] The communication unit is used to establish a data transmission link and send the monitored data to the remote server and receive the parameter setting instructions sent by the control background, and send the received parameter setting instructions to the microcontroller.

[0081] In order to further implement the above technical solution, the peripheral module also includes a housing, an external display screen 3, a status indicator light 4, a buzzer 6 and a wifi antenna 1;

[0082] An external display screen 3 is installed on the front of the housing, a status indicator light 4 is arranged below the external display screen 3, a buzzer 6 is installed on the back of the housing, and a hidden two-way power plug 7 is also arranged on the back of the housing;

[0083] The external display screen 3 is electrically connected to the display unit, the status indicator light 4 is electrically connected to the status indication unit, the buzzer 6 is electrically connected to the alarm unit, and the communication unit is electrically connected to the wifi antenna 1;

[0084] A heat dissipation window 5 and a power switch 2 are provided on the side of the housing.

[0085] Further, in the present embodiment, the external display screen 3 is a liquid crystal display screen, and the status indicator light 4 includes three types, namely, an operation indicator light (green), a warning indicator light (yellow), and a hazard indicator light (red); the operation indicator light becomes constantly on after the monitoring terminal is powered on and all modules are checked to be operating normally, indicating that the monitoring terminal is operating normally; the warning indicator light remains off under normal conditions, and when it is detected that the on-site dose exceeds the set warning threshold, it automatically lights up and turns to a yellow flashing state, and it automatically turns off when the dose returns to normal; the hazard indicator light remains off under normal conditions, and when it is detected that the on-site dose exceeds the set radiation dose alarm threshold that the human body can withstand, it automatically lights up and keeps a red rapid flashing state, and it automatically turns off when the dose returns to normal;

[0086] The outer ring of the power switch 2 will glow green after being powered on; the heat dissipation window 5 facilitates the rapid evacuation of heat inside the monitoring terminal and reduces the temperature inside the body during operation;

[0087] The hidden two-position power plug 7 can be directly lifted up and inserted into a 220V power socket. It can also serve as a wall-mounted bracket for the monitoring terminal. After being unplugged, the upper end can be pressed to retract it. The buzzer 6 can be turned on and sounded along with the hazard indicator light when the dose at the detection site exceeds the set alarm threshold of the radiation dose that the human body can withstand, reminding that the dose in the current area exceeds the standard and nearby personnel need to evacuate quickly.

[0088] The display content on the external display screen 3 is divided into two parts: the upper part displays the relevant information of the monitoring terminal (equipment number, region, installation location) and control parameters (safety warning limit, danger alarm limit, where the safety warning limit and danger warning limit correspond to the thresholds for triggering the warning indicator and the alarm indicator respectively) and real-time monitoring data (current value, transmission time, current status), in addition, there is a circular status indicator area (with a circular progress bar on the outside and a status indicator icon and monitoring icon inside) to visually indicate the status of the current monitoring data; the lower part is a curve statistical chart, which is dynamically drawn according to the distribution of the values ​​of the latest 100 monitoring points.

[0089] In order to further implement the above technical solution, a power supply module is also included, which is used to supply power to the microcontroller and the high-voltage unit;

[0090] The power supply module includes a power supply, a charging unit and a lithium battery;

[0091] The power source and the lithium battery are both connected to the power switch 2 , the charging unit is connected to the power source and the lithium battery, and the power switch 2 is connected to the power source and the lithium battery.

[0092] It needs further explanation:

[0093] The power supply in this embodiment is a 220V power supply, which is the main power supply and the lithium battery is the auxiliary power supply. When the monitoring terminal is directly connected to a 220V power socket, the 220V power supply converts the internal voltage of the circuit and supplies power to it. At the same time, the lithium battery is powered by the charging unit. When a power outage or a 220V power failure occurs, it automatically switches to lithium battery power supply. The power switch 2 mainly controls the opening and closing of the internal circuit supply.

[0094] The working principle of the present invention is:

[0095] When conducting regional radiation dose monitoring, plug the monitoring terminal into a 220V power socket or hang it on the wall. At this time, the internal circuit and the charging unit are powered by the 220V power supply, and the charging unit starts charging the built-in lithium battery. If the monitoring terminal is not plugged into a 220V power socket but hung on the wall, its built-in lithium battery must be fully charged and charged regularly to ensure its normal operation.

[0096] After turning on the power switch 2, the internal circuit and each module obtain power supply and start working. The microcontroller controls the setting of the initial parameters of the display screen, communication unit, and dual-channel detector. After detecting that each module is started normally, the operation indicator light turns on and displays green. The dual-channel detector autonomously determines which detection module to turn on or off according to the level of dose at the site (when the detected dose rate is low, the silicon photodiode is started to monitor the dose at the site, and the GM counter tube compensates for the count; when the detected dose rate is high, the silicon photodiode is turned off to prevent it from being broken down and burned due to current overload, and the GM counter tube is retained for detection). Through the intelligent response switching of radiation intensity, a wide range of on-site doses is achieved and the overall power consumption of the monitoring terminal is reduced. After the dual-path detector detects the radiation intensity signal, the AD / DA converter converts the signal into data and passes it to the microcontroller for processing. The microcontroller converts the data obtained by the detector into actual dose values ​​according to the corresponding relationship of the data calibration and transmits the dose values ​​to the internal memory for storage. The dose values ​​and timestamps are encapsulated as data packets and transmitted to the communication unit, which transmits them to the remote server through the WiFi network for storage and analysis. In addition, the dose values ​​are pushed to the display unit, which controls the external display screen 3 to display real-time data and data change curves. In addition, the microcontroller also compares the converted dose value with various thresholds (safety warning limit, danger alarm limit). If the dose value exceeds the safety warning limit, the microcontroller pushes a safety warning signal to the display unit and the status indication unit. The status indication unit drives the safety warning indicator to light up according to the status judgment. At the same time, the display unit pushes the safety warning signal and data to the display screen. The circular status indication area of ​​the display screen switches to the safety warning indication state (displaying a yellow exclamation mark safety warning icon and data) and makes a warning prompt; if the dose value exceeds the danger alarm limit, the microcontroller pushes a danger alarm signal to the display unit, the alarm unit and the status indication unit. The status indication unit drives the danger alarm indicator to light up according to the status judgment. The alarm unit drives the buzzer 6 to emit a continuous sound. At the same time, the display unit pushes the danger alarm signal and data to the display screen. The circular status indication area of ​​the display screen switches to the danger alarm indication state (displaying a red horizontal line danger alarm icon and data) and makes a warning prompt.

[0097] This embodiment also discloses a method for intelligently detecting radiation dose in a nuclear medicine diagnosis and treatment area, including the following contents:

[0098] The nuclear detection module collects data and sends the data to the central control module, which processes and analyzes the received data and generates corresponding control instructions based on the analysis results;

[0099] The method for processing the data is to perform intelligent smoothing of the count rate through a sliding window, and the specific steps include:

[0100] S1, initialization of the sliding window;

[0101] S2, fill the new data entering the sliding window into the tail of the sliding window, and remove the first data at the head of the sliding window;

[0102] S3. Calculation as the counting rate corresponding to the current dose; m is the number of data entering the sliding window;

[0103] S4. When the incoming data fills the sliding window and replaces all the initial data, the consistency evaluation standard of each element data in the sliding window is calculated:

[0104] Where: 1≤i≤n, n=window size L w ,

[0105] S5. Calculate ε in the sliding window i >ε ctl The cumulative number of is obtained to obtain the total consistency evaluation amount α;

[0106] When α ≥ 5%, the sliding window size L w Adjust to L new =L 0 -Δ, and queue the Δ elements at the head of the sliding window, and calculate the sum of the data in the remaining elements in the sliding window: As the counting rate corresponding to the current dose;

[0107] When α<5%, the sliding window size L w Adjust to L new =L 0 +Δ, until the sliding window is filled, calculate the sum of the data in the remaining elements in the window: As the counting rate corresponding to the current dose;

[0108] Among them, ε ctl is the control value of the consistency assessment standard, 1≤i≤n, n=window size L w , m = window size L new ;

[0109] S6. As data continues to enter, the calculation operations of steps S4 and S5 are repeated. When the size of the window L w Reach L 0 -Δ or L 0 +Δ boundary, no longer L w Further adjustments.

[0110] In order to further implement the above technical solution, the peripheral module receives the control instruction sent by the central control module and completes the corresponding operation according to the control instruction.

[0111] The above contents will be further explained below:

[0112] Among them, the sliding window (Slide Window, abbreviated as SW) can define a data set that participates in the counting rate statistics and smoothing filter calculation within a calculation statistical cycle. The sliding window uses a first-in-first-out variable-length queue structure for storage. The elements E(x i , w i ) consisting of two tuples, where: x i To enter the statistical data of the window, For data x i and expectations The absolute value of , 1≤i≤n.

[0113] The sliding window can be expressed as follows:

[0114] SW={E(x 1 , w 1 ), E(x 2 , w 2 ),…,E(x n , w n )}

[0115] Among them, x i ,w i ∈R + ,1≤i≤n,n is the window size;

[0116] Window size L w : is the total capacity of the elements that can be accommodated in the sliding window. The initial value of the window size is L 0 , which is specified by the user when creating the sliding window and can be set according to the processing power of the microcontroller (generally set between 100-200). In order to ensure the smoothness of the data in the sliding window and reflect the actual change trend of the data, the adjustment size Δ is introduced here: Δ is the window size that can be dynamically increased or decreased by the sliding window. The adjustment is based on the distribution of the sample data (when the data has continuous peaks or fluctuations, the window size is reduced, and when the data tends to be consistent, the window size is increased). The adjusted window size is L 0 -Δ or L 0 +Δ.

[0117] The specific method of initializing the sliding window is:

[0118] First, the initial length of the sliding window is L 0 Set and fill a set of length L 0, the values ​​in the elements are filled with 0.

[0119] For sliding window consistency:

[0120] Consistency evaluation standards: 1≤i≤n, n is the window size, which indicates the degree of deviation between the data in each window element and the expected value. If ε i >ε ctl (where: ε ctl is the control value of the consistency assessment standard, generally ε ctl Control , depending on the specific situation), then count and accumulate, and after traversing the entire sliding window, the total consistency evaluation amount is obtained: α = count (ε i >ε ctl ), where count is the count, 1≤i≤n, n is the window size, and the initial value of α is 0.

[0121] If α ≥ 5%, then the window size L w Reduce the capacity of Δ (adjustment size) accordingly; when α<5%, the window size L w The capacity of the corresponding extension Δ (adjustment size). Window size L w The capacity increased or decreased each time is Δ, and L w Always in L 0 -3Δ≤L 0 Within the +3Δ range.

[0122] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0123] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A nuclear medicine treatment area radiation dose intelligent detection terminal, which communicates with a remote server, characterized in that: include: Power supply module, nuclear detection module, central control module and peripheral module; The nuclear detection module is connected to the central control module and the power supply module respectively, and the central control module is connected to the peripheral module and the power supply module respectively; The nuclear detection module is used to detect the radiation dose in the nuclear medicine diagnosis and treatment area and send the detected electrical signal to the central control module; The central control module is used to process and analyze the electrical signal data and generate corresponding control instructions according to the analysis results; The method for processing the data is to perform intelligent smoothing of the count rate through a sliding window. The specific steps include: S1, initialization of the sliding window; S2, fill the new data entering the sliding window into the tail of the sliding window, and remove the first data at the head of the sliding window; S3. Calculation as the counting rate corresponding to the current dose; m is the number of data entering the sliding window; S4. When the incoming data fills the sliding window and replaces all the initial data, the consistency evaluation standard of each element data in the sliding window is calculated: Where: 1≤i≤n, n=window size L w , S5. Calculate ε in the sliding window i >ε ctl The cumulative number of is obtained to obtain the total consistency evaluation amount α; When α ≥ 5%, the sliding window size L w Adjust to L new =L0-Δ, and queue the Δ elements at the head of the sliding window, and calculate the sum of the data in the remaining elements in the sliding window: As the counting rate corresponding to the current dose; When α<5%, the sliding window size L w Adjust to L new =L0+Δ, until the sliding window is filled, calculate the sum of the data in the remaining elements in the window: As the counting rate corresponding to the current dose; Among them, ε ctl is the control value of the consistency assessment standard, 1≤i≤n, n=window size L w , m = window size L new ; S6. As data continues to enter, the calculation operations of steps S4 and S5 are repeated. When the size of the window L w When the boundary of L0-Δ or L0+Δ is reached, L w Further adjustments; The peripheral module is used to receive the control instructions sent by the central control module and complete corresponding operations according to the control instructions.

2. According to claim 1, a nuclear medicine diagnosis and treatment area radiation dose intelligent detection terminal is characterized in that: The nuclear detection module includes a dual-path detector and a signal amplifier; The dual-path detector is used to detect the radiation dose in the nuclear medicine diagnosis and treatment area, obtain the nuclear radiation dose electrical signal, and send it to the signal amplifier; The signal amplifier is used to amplify the received electrical signal and send the processed electrical signal to the central control module.

3. According to claim 2, a nuclear medicine diagnosis and treatment area radiation dose intelligent detection terminal is characterized in that: The nuclear detection module also includes a high voltage unit, and the dual-path detector includes a silicon photodiode and a GM counter tube; The high voltage unit is used to supply power to the GM counter tube; The silicon photodiode and the GM counter tube are both used to detect the radiation dose in the nuclear medicine diagnosis and treatment area and automatically switch according to the detected radiation dose. When the radiation dose is low, the silicon photodiode is used for detection and the GM counter tube compensates for the counting. When the radiation dose is high, the silicon photodiode is turned off and the GM counter tube is kept working.

4. The intelligent detection terminal for radiation dose in nuclear medicine diagnosis and treatment area according to claim 3 is characterized in that: The central control module includes an AD / DA converter, a microcontroller and an internal memory; wherein the signal amplifier is connected to the AD / DA converter, and the AD / DA converter, the microcontroller and the internal memory are connected in sequence; The AD / DA converter is used to realize mutual conversion between analog and digital electrical signals; The microcontroller is used to complete the setting of the initial parameters of the peripheral module, analyze the converted data, send the acquired data to the internal memory and the remote server respectively, and send corresponding control instructions to the peripheral module according to the analysis results; The internal memory is used to permanently store operating parameters and temporarily store monitoring data, and automatically clears part of the historical data stored in an earlier time period when the monitoring data storage volume exceeds a set upper capacity limit.

5. The intelligent detection terminal for radiation dose in nuclear medicine diagnosis and treatment area according to claim 4, characterized in that: The peripheral module includes a display unit, an alarm unit, a status indication unit and a communication unit; the display unit, the alarm unit, the status indication unit and the communication unit are all connected to the microcontroller; The display unit is used to control and display real-time data and data change curve graphs; The alarm unit is used to realize an alarm when receiving an alarm indication signal; The state indication unit is used to complete the indication of the working state of the detection terminal; The communication unit is used to establish a data transmission link and send the monitored data to the remote server and receive the parameter setting instructions sent by the control background, and send the received parameter setting instructions to the microcontroller.

6. The intelligent detection terminal for radiation dose in nuclear medicine diagnosis and treatment area according to claim 5, characterized in that: The peripheral module also includes a housing, an external display screen, a status indicator light, a buzzer and a wifi antenna; An external display screen is installed on the front of the shell, the status indicator light is arranged below the external display screen, the buzzer is installed on the back of the shell, and a hidden two-terminal power plug is also arranged on the back of the shell; The external display screen is electrically connected to the display unit, the status indicator light is electrically connected to the status indication unit, the buzzer is electrically connected to the alarm unit, and the communication unit is electrically connected to the wifi antenna; A heat dissipation window and a power switch are arranged on the side of the shell.

7. The intelligent detection terminal for radiation dose in nuclear medicine diagnosis and treatment area according to claim 6, characterized in that: It also includes a power supply module, which is used to supply power to the microcontroller and the high-voltage unit; The power supply module includes a power supply, a charging unit and a lithium battery; The power source and the lithium battery are both connected to the power switch, the charging unit is connected to the power source and the lithium battery, and the power switch is connected to the power source and the lithium battery.

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