CN111624642A - Nuclear medicine diagnosis and treatment area radiation dose intelligent detection terminal and method thereof - Google Patents
Nuclear medicine diagnosis and treatment area radiation dose intelligent detection terminal and method thereof Download PDFInfo
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Abstract
The invention discloses a nuclear medicine diagnosis and treatment area radiation dose intelligent detection terminal and a method thereof, wherein the terminal comprises: the system comprises a nuclear detection module, a central control module and a peripheral module; the nuclear detection module is used for detecting the radiation dose of a nuclear medicine diagnosis and treatment area and sending a detected electric signal to the central control module; the central control module is used for processing and analyzing the electric signal data and generating a corresponding control instruction according to an analysis result; the peripheral module is used for receiving the control instruction sent by the central control module and completing corresponding operation according to the control instruction; the method for processing the data comprises the steps of intelligently smoothing the counting rate through a sliding window; the method can effectively realize dynamic monitoring of radiation dose and radiation safety early warning in the nuclear medicine diagnosis and treatment area, and can achieve the purpose of dynamically and elastically increasing and decreasing sample data, effectively filter instantaneous distortion numerical values and improve the sensitivity corresponding to detection data.
Description
Technical Field
The invention relates to the technical field of radiation detection of nuclear medicine diagnosis and treatment areas, in particular to an intelligent radiation dose detection terminal and method for a nuclear medicine diagnosis and treatment area.
Background
With the increasing level of medical care, nuclear medicine has been widely used as a new discipline for the diagnosis, treatment and research of diseases using nuclear technology, such as: modern nuclear medicine diagnosis and treatment instruments such as X-rays, CT, nuclear magnetic resonance, PETCT, gamma knife and the like play an important role in the aspects of auxiliary diagnosis, malignant tumor treatment and the like.
According to the reports of the international original energy agency (LAEA) and the World Health Organization (WHO), about 80% to 90% of all artificial radionuclides produced in the world are used in medicine. The medical accelerator accounts for about half of the total number of accelerators in the world, and the situation is similar in China. For the purpose of diagnostic examination or treatment, in radiodiagnosis, radiotherapy and the like, a subject or patient is intentionally subjected to medical irradiation with a radiation or a radionuclide, and a dose (0.5 to 2.0) mSv/a (milliWatt/year) given to a human being is many times higher than a dose (1 to 200). times.10 to 3mSv/a (close to, i.e., distant from) resulting from normal operation of a current nuclear power plant. Up to now, the dose of medical radiation accounts for more than 90% of the dose caused by all artificial radiation sources, so it is very important to enhance the radioactive sanitation work in medical radiation.
At present, in clinical diagnosis and treatment practice, the radiation protection measures adopted by medical personnel engaged in nuclear medicine work and patients receiving radionuclide medical diagnosis and treatment are relatively weak; meanwhile, a radiation dose monitoring system equipped in the radioactive diagnosis and treatment area has a single relative function and is not mature enough; the related diagnosis and treatment work is guided and carried out mainly through the nuclear medicine related theory and the personal experience of medical care personnel.
Therefore, it is an urgent need to solve the problem of the technical staff in the art to provide an intelligent radiation dose detection terminal and method for nuclear medicine diagnosis and treatment area capable of performing intelligent real-time monitoring.
Disclosure of Invention
In view of the above, the invention provides an intelligent radiation dose detection terminal for a nuclear medicine diagnosis and treatment area and a method thereof, and aims to realize dynamic monitoring and radiation safety early warning of radiation dose in the nuclear medicine diagnosis and treatment area, and the method can achieve the purpose of dynamically and elastically increasing and decreasing sample data, effectively filter instantaneous distortion values and improve the sensitivity corresponding to detection data.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a regional radiation dose intellectual detection system terminal is diagnose to nuclear medicine, communicates with the remote server, includes: the system comprises a nuclear detection module, a central control module and a peripheral module;
the nuclear detection module is respectively connected with the central control module and the power supply module, and the central control module is respectively connected with the peripheral module and the power supply module;
the nuclear detection module is used for detecting the radiation dose of a nuclear medicine diagnosis and treatment area and sending a detected electric signal to the central control module;
the central control module is used for processing and analyzing the electric signal data and generating a corresponding control instruction according to an analysis result;
and the peripheral module is used for receiving the control instruction sent by the central control module and finishing corresponding operation according to the control instruction.
Preferably, the nuclear detection module comprises a double-path detector and a signal amplifier;
the dual-path detector is used for detecting the radiation dose of the nuclear medicine diagnosis and treatment area, acquiring a nuclear radiation dose electric signal and sending the nuclear radiation dose electric signal to the signal amplifier;
the signal amplifier is used for amplifying the received electric signals and sending the processed electric signals to the central control module.
Preferably, the nuclear detection module further comprises a high-voltage unit, and the two-way detector comprises a silicon photodiode and a GM counting tube;
the high-voltage unit is used for supplying power to the GM counting tube;
the silicon photodiode and the GM counting tube are used for detecting the radiation dose of the nuclear medicine diagnosis and treatment area and automatically switching according to the detected radiation dose, the radiation dose is detected through the silicon photodiode when being low, the GM counting tube compensates counting, the silicon photodiode is closed when the radiation dose is high, and the GM counting tube is reserved for working.
Preferably, the central control module comprises an AD/DA converter, a microcontroller and an internal memory; the signal amplifier is connected with the AD/DA converter, and the AD/DA converter, the microcontroller and the internal memory are sequentially connected;
the AD/DA converter is used for realizing mutual conversion between analog-digital electric signals;
the microcontroller is used for setting initial parameters of the peripheral module, analyzing the converted data, simultaneously respectively sending the acquired data to the internal memory and the remote server, and sending a corresponding control instruction to the peripheral module according to an analysis result;
the internal memory is used for permanently storing the operating parameters and temporarily storing the monitoring data, and when the monitoring data storage amount exceeds the set upper capacity limit, part of historical data stored in an earlier time period is automatically cleared.
Preferably, the peripheral module comprises a display unit, an alarm unit, a state indicating unit and a communication unit; the display unit, the alarm unit, the state indicating unit and the communication unit are all connected with the microcontroller;
the display unit is used for controlling and displaying real-time data and a data change curve graph;
the alarm unit is used for realizing alarm when receiving an alarm indication signal;
the state indicating unit is used for finishing the indication of the working state of the detection terminal;
the communication unit is used for establishing a data transmission link, sending monitored data to a remote server, receiving a parameter setting instruction sent by a control background, and sending the received parameter setting instruction to the microcontroller.
Preferably, the peripheral module further comprises a shell, an external display screen, a status indicator lamp, a buzzer and a wifi antenna;
the front surface of the shell is provided with an external display screen, the state indicator lamp is arranged below the external display screen, the buzzer is arranged on the back surface of the shell, and the back surface of the shell is also provided with two concealed power plugs;
the external display screen is electrically connected with the display unit, the status indicator lamp is electrically connected with the status indicator unit, the buzzer is electrically connected with the alarm unit, and the communication unit is electrically connected with the wifi antenna;
and a heat dissipation window and a power switch are arranged on the side surface of the shell.
Preferably, the power supply module is used for supplying power to the microcontroller and the high-voltage unit;
the power supply module comprises a power supply, a charging unit and a lithium battery;
the power supply and the lithium battery are connected with the power supply switch, the charging unit is connected with the power supply and the lithium battery, and the power supply switch is connected with the power supply and the lithium battery.
An intelligent radiation dose detection method for nuclear medicine diagnosis and treatment areas comprises the following steps:
the method comprises the following steps that data are collected through a nuclear detection module and sent to a central control module, the central control module processes and analyzes the received data, and a corresponding control instruction is generated according to an analysis result;
the method for processing the data comprises the following steps: carry out intelligent smooth processing to the count rate through sliding window, concrete step includes:
s1, initializing the sliding window;
s2, filling the data newly entering the sliding window into the tail part of the sliding window, and removing the first data at the head part of the sliding window;
s3, calculating
As the count rate corresponding to the current dose; m is the number of data entering the sliding window;
s4, when the sliding window is filled with the entered data and all the initial data are replaced, the consistency evaluation standard of each element data in the sliding window is calculated:
wherein: i is not less than 1 and not more than n, n is the window size Lw，
S5, calculating in the sliding windowi＞ctlTo obtain a consistency assessment total α;
when α is greater than or equal to 5%, the window will be slid by size LwIs adjusted to Lnew＝L0- Δ, simultaneously queue the Δ elements at the head of the sliding window, calculating the sum of the data in the remaining elements within the sliding window:
as the count rate corresponding to the current dose;
when α < 5%, the window size L is slidwIs adjusted toLnew＝L0+ Δ, until the sliding window is filled, the sum of the data in the remaining elements in the window is calculated:
as the count rate corresponding to the current dose;
wherein,ctlfor the control values of the consistency assessment criterion, i is 1. ltoreq. n, n is the window size LwM is window size Lnew；
S6, repeating the calculation operations of step S4 and step S5 as the data continuously enter, and determining the size L of the windowwTo reach L0- Δ or L0At the + Δ boundary, L is no longer pairedwAnd (5) further adjusting.
Preferably, the peripheral module receives the control instruction sent by the central control module and completes corresponding operation according to the control instruction.
According to the technical scheme, compared with the prior art, the invention discloses and provides the intelligent radiation dose detection terminal for the nuclear medicine diagnosis and treatment area and the method thereof, and the beneficial effects of adopting the technical scheme are as follows:
firstly, the detection terminal disclosed by the invention combines the actual requirements of the current nuclear medicine field on the area monitoring technology and application, comprehensively utilizes the nuclear detection technology and the wireless data transmission technology, can effectively realize dynamic monitoring and radiation safety early warning on radiation dose in the nuclear medicine diagnosis and treatment area, can enable the monitoring and supervision work of occupational and non-occupational radioactive irradiation to be more transparent, and has an important promotion effect on improving the radioactive diagnosis and treatment level, reducing unnecessary radiation and protecting the health and safety of medical personnel and patients;
in addition, the method disclosed by the invention relates to the content of processing the data samples, and the spatial capacity of the sample data participating in statistical calculation is dynamically adjusted according to expected values and the consistency degree of the data through statistical analysis of the data samples, so that the aim of dynamically and flexibly increasing and decreasing the sample data is fulfilled; the method can fully utilize the advantages of a rolling average method in the aspect of data smoothness, effectively filters out instantaneous distortion numerical values, dynamically adjusts the size of a sliding window according to the statistical result of sample data, ensures that data peak values (including data of the sample data between a wave crest and a wave trough) are not filtered out by excessive smoothness, can quickly embody the trend (such as rising or falling trend) of overall data change and the purpose of quickly detecting out overrun data on the premise of ensuring the data to be smooth and stable, further improves the sensitivity of monitoring data response, and further improves the practicability of the method disclosed by the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a diagram illustrating an overall framework structure of an intelligent radiation dose detection terminal for a nuclear medicine diagnosis and treatment area according to the present invention;
fig. 2 is a front view of an intelligent radiation dose detection terminal for a nuclear medicine diagnosis and treatment area according to the present invention;
fig. 3 is a rear view of an intelligent radiation dose detection terminal for a nuclear medicine diagnosis and treatment area according to the present invention;
fig. 4 is a schematic flowchart of a data processing method in an intelligent radiation dose detection method for a nuclear medicine diagnosis and treatment area according to the present invention;
1-wifi antenna, 2-power switch, 3-external display screen, 4-status indicator lamp, 5-heat dissipation window, 6-buzzer, 7-hidden two power plugs.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses an intelligent radiation dose detection terminal for a nuclear medicine diagnosis and treatment area, which is communicated with a remote server and comprises the following components: the system comprises a nuclear detection module, a central control module and a peripheral module;
the nuclear detection module is respectively connected with the central control module and the power supply module, and the central control module is respectively connected with the peripheral module and the power supply module;
the nuclear detection module is used for detecting the radiation dose of a nuclear medicine diagnosis and treatment area and sending a detected electric signal to the central control module;
the central control module is used for processing and analyzing the electric signal data and generating a corresponding control instruction according to an analysis result;
the peripheral module is used for receiving the control instruction sent by the central control module and finishing corresponding operation according to the control instruction.
In order to further realize the technical scheme, the nuclear detection module comprises a double-path detector and a signal amplifier;
the dual-path detector is used for detecting the radiation dose of the nuclear medicine diagnosis and treatment area, acquiring a nuclear radiation dose electric signal and sending the nuclear radiation dose electric signal to the signal amplifier;
the signal amplifier is used for amplifying the received electric signals and sending the processed electric signals to the central control module.
In order to further realize the technical scheme, the nuclear detection module also comprises a high-voltage unit, and the double-path detector comprises a silicon photodiode and a GM counting tube;
the high-voltage unit is used for supplying power to the GM counting tube;
the silicon photodiode and the GM counting tube are used for detecting the radiation dose of the nuclear medicine diagnosis and treatment area and automatically switching according to the detected radiation dose, the radiation dose is detected through the silicon photodiode when being low, the GM counting tube compensates counting, the silicon photodiode is closed when the radiation dose is high, and the work of the GM counting tube is reserved.
It needs to be further explained that:
in the detection process, the silicon photodiode and the GM counting tube are mutually supplemented, and can be automatically switched according to the height of the detection dose;
in order to further realize the technical scheme, the central control module comprises an AD/DA converter, a microcontroller and an internal memory; the signal amplifier is connected with the AD/DA converter, and the AD/DA converter, the microcontroller and the internal memory are sequentially connected;
the AD/DA converter is used for realizing mutual conversion between analog-digital electric signals;
the microcontroller is used for setting initial parameters of the peripheral module, analyzing the converted data, simultaneously respectively sending the acquired data to the internal memory and the remote server, and sending a corresponding control instruction to the peripheral module according to an analysis result;
the internal memory is used for permanently storing the operating parameters and temporarily storing the monitoring data, and when the monitoring data storage amount exceeds the set upper capacity limit, part of historical data stored in an earlier time period is automatically cleared.
In order to further realize the technical scheme, the peripheral module comprises a display unit, an alarm unit, a state indicating unit and a communication unit; the display unit, the alarm unit, the state indicating unit and the communication unit are all connected with the microcontroller;
the display unit is used for controlling and displaying real-time data and a data change curve graph;
the alarm unit is used for realizing alarm when receiving the alarm indication signal;
the state indicating unit is used for finishing the indication of the working state of the detection terminal;
the communication unit is used for establishing a data transmission link, sending monitored data to the remote server, receiving a parameter setting instruction sent by the control background, and sending the received parameter setting instruction to the microcontroller.
In order to further realize the technical scheme, the peripheral module further comprises a shell, an external display screen 3, a status indicator lamp 4, a buzzer 6 and a wifi antenna 1;
the front surface of the shell is provided with an external display screen 3, a status indicator lamp 4 is arranged below the external display screen 3, the buzzer 6 is arranged on the back surface of the shell, and the back surface of the shell is also provided with two concealed power plugs 7;
the external display screen 3 is electrically connected with the display unit, the status indicator lamp 4 is electrically connected with the status indicator unit, the buzzer 6 is electrically connected with the alarm unit, and the communication unit is electrically connected with the wifi antenna 1;
and a heat dissipation window 5 and a power switch 2 are arranged on the side surface of the shell.
Further, in this embodiment, the external display screen 3 is a liquid crystal display, and the status indicator lights 4 include three types, which are sequentially an operation indicator light (green), an early warning indicator light (yellow), and a hazard indicator light (red); the operation indicator lamp is in a normally-on state after the monitoring terminal is powered on and all modules are checked to normally work, and the operation indicator lamp indicates that the monitoring terminal normally works; the early warning indicator lamp keeps an off state in a normal state, automatically lights up to be in a yellow flashing state when detecting that the dosage on site exceeds a set early warning threshold value, and automatically turns off when the dosage is recovered to be normal; the danger indicator lamp keeps an off state in a normal state, automatically lights and keeps a red and rapid flashing state when detecting that the field dose exceeds a set irradiation dose alarm threshold value which can be born by a human body, and automatically lights off when the dose is recovered to be normal;
the outer ring of the power switch 2 can emit light to turn green after being electrified and started; the heat dissipation window 5 is convenient for rapid evacuation of heat inside the monitoring terminal and reduces the temperature inside the machine body during operation;
the hidden two power plugs 7 can be directly lifted upwards and inserted into a 220V power socket, and can also be used as a wall-mounted bracket of the monitoring terminal, and the upper end of the hidden two power plugs can be pressed and retracted after being pulled out; the buzzer 6 can start to sound along with the danger indicator lamp when the dosage of the detection site exceeds the set irradiation dosage alarm threshold value which can be born by the human body, so as to remind people nearby to rapidly evacuate when the dosage in the current area exceeds the standard.
The display content on the external display screen 3 is divided into two parts: the upper part of the monitoring terminal displays relevant information (equipment number, area and installation position) and control parameters (safety early warning limit and danger alarm limit, wherein the safety early warning limit and the danger early warning limit respectively correspond to threshold values for triggering an early warning indicator lamp and an alarm indicator lamp) and real-time monitoring data (current value, transmission time and current state), the monitoring terminal also comprises a circular state indication area (an annular progress bar is arranged outside, a state indication icon is arranged inside the circular state indication area and the state of the current monitoring data is vividly indicated by monitoring, and the lower part of the monitoring terminal is a curve statistical graph which is dynamically drawn according to the value distribution condition of the latest 100 monitoring points.
In order to further realize the technical scheme, the power supply device also comprises a power supply module which is used for supplying power to the microcontroller and the high-voltage unit;
the power supply module comprises a power supply, a charging unit and a lithium battery;
the power supply and the lithium battery are both connected with the power supply switch 2, the charging unit is connected with the power supply and the lithium battery, and the power supply switch 2 is connected with the power supply and the lithium battery.
It needs to be further explained that:
the power in this embodiment is the 220V power, and the 220V power is main power supply, and the lithium cell is supplementary power supply, and when monitor terminal direct connection was to 220V supply socket, the switching of circuit internal voltage was carried out and was supplied power for it by the 220V power, supplies power to the lithium cell through the charging unit simultaneously, and automatic switch is the lithium cell power supply when having a power failure or 220V power breaks down, and switch 2 mainly controls opening and closing of internal circuit supply.
The working principle of the invention is as follows:
when regional radiation dose monitoring is carried out, the monitoring terminal is inserted into a 220V power socket or hung on a wall, at the moment, a 220V power supply supplies power to an internal circuit and a charging unit, and the charging unit starts a charging mode of a built-in lithium battery; if the monitoring terminal is hung on a wall without being plugged into a 220V power socket, a built-in lithium battery needs to be fully charged and periodically charged to ensure that the monitoring terminal can normally operate.
After the power switch 2 is turned on, the internal circuit and each module obtain power supply and start the starting work, the microcontroller controls the setting of the initial parameters of the display screen, the communication unit and the double-path detector, and after the modules are detected to be normally started, the operation indicator lamp is turned on and displays the green color. The double-path detector automatically judges which detection module is started or closed according to the dosage level of the site (when the detected dosage rate is low, a silicon photodiode is started to monitor the dosage of the site, a GM counting tube is used for compensating counting, when the detected dosage rate is high, the silicon photodiode is closed, the breakdown and burning of the silicon photodiode caused by current overload are prevented, and the GM counting tube is reserved for detection). The wide-range coverage of the field dosage is realized and the overall power consumption of the monitoring terminal is reduced through intelligent response switching of the radiation intensity. After the double-path detector detects a radiation intensity signal, the AD/DA converter converts the signal into data and sends the data to the microcontroller for processing, the microcontroller converts the data obtained by the detector into an actual dosage value according to the corresponding relation of data calibration, transmits the dosage value to the internal memory for storage, encapsulates the dosage value and the timestamp into data packets and transmits the data packets to the communication unit, the communication unit transmits the data packets to the remote server through a WiFi network for storage and analysis, the dosage value is pushed to the display unit, and the display unit controls the external display screen 3 to display a real-time data and data change curve graph. In addition, the microcontroller compares the converted dose value with various thresholds (safety early warning limit value and danger alarm limit value), if the dose value exceeds the safety early warning limit value, the microcontroller pushes a safety early warning signal to the display unit and the state indicating unit, the state indicating unit drives the safety early warning indicator lamp to be turned on according to the judgment of the state, meanwhile, the display unit pushes the safety early warning signal and data to the display screen, and the circular state indicating area of the display screen is switched to a safety early warning indicating state (yellow exclamation mark safety early warning icon and data are displayed) and gives an early warning prompt; if the dosage value exceeds the danger alarm limit, the microcontroller pushes danger alarm signals to the display unit, the alarm unit and the state indicating unit, the state indicating unit drives the danger alarm indicating lamp to light according to the judgment of the state, the alarm unit drives the buzzer 6 to sound continuously, the display unit pushes the danger alarm signals and data to the display screen, and the display screen is switched to a danger alarm indicating state (displaying danger alarm icons and data of red cross lines) in a circle-cutting shape indicating area and gives an early warning prompt.
The embodiment also discloses an intelligent radiation dose detection method for the nuclear medicine diagnosis and treatment area, which comprises the following steps:
the data are collected through a nuclear detection module and are sent to a central control module, and the central control module processes and analyzes the received data and generates a corresponding control instruction according to an analysis result;
the method for processing the data comprises the following steps: carry out intelligent smooth processing to the count rate through sliding window, concrete step includes:
s1, initializing the sliding window;
s2, filling the data newly entering the sliding window into the tail part of the sliding window, and removing the first data at the head part of the sliding window;
s3, calculating
As the count rate corresponding to the current dose; m is the number of data entering the sliding window;
s4, when the sliding window is filled with the entered data and all the initial data are replaced, the consistency evaluation standard of each element data in the sliding window is calculated:
wherein: i is not less than 1 and not more than n, n is the window size Lw，
S5, calculating in the sliding windowi＞ctlTo obtain a consistency assessment total α;
when α is greater than or equal to 5%, the window will be slid by size LwIs adjusted to Lnew＝L0Δ, simultaneously sliding the head of the window ΔThe elements make a queue operation, and the sum of data in the remaining elements in the sliding window is calculated as follows:
as the count rate corresponding to the current dose;
when α < 5%, the window size L is slidwIs adjusted to Lnew＝L0+ Δ, until the sliding window is filled, the sum of the data in the remaining elements in the window is calculated:
as the count rate corresponding to the current dose;
wherein,ctlfor the control values of the consistency assessment criterion, i is 1. ltoreq. n, n is the window size LwM is window size Lnew；
S6, repeating the calculation operations of step S4 and step S5 as the data continuously enter, and determining the size L of the windowwTo reach L0- Δ or L0At the + Δ boundary, L is no longer pairedwAnd (5) further adjusting.
In order to further realize the technical scheme, the peripheral module receives the control instruction sent by the central control module and completes corresponding operation according to the control instruction.
The above will be further explained below:
wherein, a Sliding Window (SW) may define a data set for participating in counting rate statistics and smooth filtering calculation in a calculation statistics period. The sliding window is stored by adopting a first-in first-out variable length queue structure, and an element E (x) in the windowi，wi) A binary set of constructs wherein: x is the number ofiIn order to enter the data of the window statistics,
as data xiAnd desire to
I is more than or equal to 1 and less than or equal to n.
The sliding window can be expressed by the following formula:
SW＝{E(x1，w1)，E(x2，w2)，…，E(xn，wn)}
wherein x isi,wi∈R+I is more than or equal to 1 and less than or equal to n, and n is the size of the window;
window size Lw: the initial value of the window size is L for the total capacity of elements in the sliding window0The user can specify when the sliding window is created, and the setting can be performed according to the processing capability of the micro-controller (generally between 100 and 200 is preferable). In order to ensure the smoothness of the data in the sliding window and reflect the actual variation trend of the data, the regulation size delta: delta is the window size that can be dynamically increased or decreased by sliding the window, the adjustment is based on the sample data distribution (decreasing the window size when the data has continuous peaks or fluctuations, increasing the window size when the data is consistent), and the window size after adjustment is L0- Δ or L0+Δ。
The specific way to initialize the sliding window is as follows:
firstly, the initial length L of the sliding window0Setting and filling a group with length L0The values in the elements are all filled with 0.
For sliding window consistency:
consistency evaluation criteria:
1 ≦ i ≦ n, n being the window size and indicating the degree of deviation of the data in each window element from what is expected ifi＞ctl(wherein:ctlcontrol values for the consistency assessment criteria, in generalctlIs controlled at
According to the specific situation), counting and accumulating are carried out, and the total consistency evaluation amount is obtained after the whole sliding window is traversed, wherein α is equal to count (a)i＞ctl) Wherein:count is the count, i is more than or equal to 1 and less than or equal to n, n is the window size, and α has an initial value of 0.
If α is greater than or equal to 5%, the window size L is increasedwThe size of window is reduced by delta (regulated size), and when α is less than 5%, the size of window is increased by LwThe capacity for delta (regulatory size) is extended accordingly. Window size LwThe capacity per increment or decrement is Δ, and L is guaranteedwIs always at L0-3Δ≤L0Within the +3 delta interval.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides a regional radiation dose intellectual detection system terminal is diagnose to nuclear medicine, communicates with the distal end server, a serial communication port, includes: the system comprises a nuclear detection module, a central control module and a peripheral module;
the nuclear detection module is respectively connected with the central control module and the power supply module, and the central control module is respectively connected with the peripheral module and the power supply module;
the nuclear detection module is used for detecting the radiation dose of a nuclear medicine diagnosis and treatment area and sending a detected electric signal to the central control module;
the central control module is used for processing and analyzing the electric signal data and generating a corresponding control instruction according to an analysis result;
and the peripheral module is used for receiving the control instruction sent by the central control module and finishing corresponding operation according to the control instruction.
2. The intelligent radiation dose detection terminal for nuclear medicine diagnosis and treatment areas according to claim 1, wherein the nuclear detection module comprises a double-path detector and a signal amplifier;
the dual-path detector is used for detecting the radiation dose of the nuclear medicine diagnosis and treatment area, acquiring a nuclear radiation dose electric signal and sending the nuclear radiation dose electric signal to the signal amplifier;
the signal amplifier is used for amplifying the received electric signals and sending the processed electric signals to the central control module.
3. The intelligent radiation dose detection terminal for nuclear medicine diagnosis and treatment areas according to claim 2, wherein the nuclear detection module further comprises a high voltage unit, and the two-way detector comprises a silicon photodiode and a GM counting tube;
the high-voltage unit is used for supplying power to the GM counting tube;
the silicon photodiode and the GM counting tube are used for detecting the radiation dose of the nuclear medicine diagnosis and treatment area and automatically switching according to the detected radiation dose, the radiation dose is detected through the silicon photodiode when being low, the GM counting tube compensates counting, the silicon photodiode is closed when the radiation dose is high, and the GM counting tube is reserved for working.
4. The intelligent radiation dose detection terminal for nuclear medicine diagnosis and treatment area according to claim 3, wherein the central control module comprises an AD/DA converter, a microcontroller and an internal memory; the signal amplifier is connected with the AD/DA converter, and the AD/DA converter, the microcontroller and the internal memory are sequentially connected;
the AD/DA converter is used for realizing mutual conversion between analog-digital electric signals;
the microcontroller is used for setting initial parameters of the peripheral module, analyzing the converted data, simultaneously respectively sending the acquired data to the internal memory and the remote server, and sending a corresponding control instruction to the peripheral module according to an analysis result;
the internal memory is used for permanently storing the operating parameters and temporarily storing the monitoring data, and when the monitoring data storage amount exceeds the set upper capacity limit, part of historical data stored in an earlier time period is automatically cleared.
5. The intelligent radiation dose detection terminal for nuclear medicine diagnosis and treatment areas according to claim 4, wherein the peripheral module comprises a display unit, an alarm unit, a status indication unit and a communication unit; the display unit, the alarm unit, the state indicating unit and the communication unit are all connected with the microcontroller;
the display unit is used for controlling and displaying real-time data and a data change curve graph;
the alarm unit is used for realizing alarm when receiving an alarm indication signal;
the state indicating unit is used for finishing the indication of the working state of the detection terminal;
the communication unit is used for establishing a data transmission link, sending monitored data to a remote server, receiving a parameter setting instruction sent by a control background, and sending the received parameter setting instruction to the microcontroller.
6. The intelligent radiation dose detection terminal for nuclear medicine diagnosis and treatment areas according to claim 5, wherein the peripheral module further comprises a housing, an external display screen, a status indicator lamp, a buzzer and a wifi antenna;
the front surface of the shell is provided with an external display screen, the state indicator lamp is arranged below the external display screen, the buzzer is arranged on the back surface of the shell, and the back surface of the shell is also provided with two concealed power plugs;
the external display screen is electrically connected with the display unit, the status indicator lamp is electrically connected with the status indicator unit, the buzzer is electrically connected with the alarm unit, and the communication unit is electrically connected with the wifi antenna;
and a heat dissipation window and a power switch are arranged on the side surface of the shell.
7. The intelligent radiation dose detection terminal for the nuclear medicine diagnosis and treatment area according to claim 6, further comprising a power supply module for supplying power to the microcontroller and the high voltage unit;
the power supply module comprises a power supply, a charging unit and a lithium battery;
the power supply and the lithium battery are connected with the power supply switch, the charging unit is connected with the power supply and the lithium battery, and the power supply switch is connected with the power supply and the lithium battery.
8. An intelligent radiation dose detection method for nuclear medicine diagnosis and treatment areas is characterized by comprising the following steps:
the method comprises the following steps that data are collected through a nuclear detection module and sent to a central control module, the central control module processes and analyzes the received data, and a corresponding control instruction is generated according to an analysis result;
the method for processing the data comprises the following steps: carry out intelligent smooth processing to the count rate through sliding window, concrete step includes:
s1, initializing the sliding window;
s2, filling the data newly entering the sliding window into the tail part of the sliding window, and removing the first data at the head part of the sliding window;
s3, calculating
As a current dose corresponds toCounting rate; m is the number of data entering the sliding window;
s4, when the sliding window is filled with the entered data and all the initial data are replaced, the consistency evaluation standard of each element data in the sliding window is calculated:
wherein: i is not less than 1 and not more than n, n is the window size Lw，
S5, calculating in the sliding windowi＞ctlTo obtain a consistency assessment total α;
when α is greater than or equal to 5%, the window will be slid by size LwIs adjusted to Lnew＝L0- Δ, simultaneously queue the Δ elements at the head of the sliding window, calculating the sum of the data in the remaining elements within the sliding window:
as the count rate corresponding to the current dose;
when α < 5%, the window size L is slidwIs adjusted to Lnew＝L0+ Δ, until the sliding window is filled, the sum of the data in the remaining elements in the window is calculated:
as the count rate corresponding to the current dose;
wherein,ctlfor the control values of the consistency assessment criterion, i is 1. ltoreq. n, n is the window size LwM is window size Lnew；
S6, repeating the calculation operations of step S4 and step S5 as the data continuously enter, and determining the size L of the windowwTo reach L0- Δ or L0At the + Δ boundary, L is no longer pairedwAnd (5) further adjusting.
9. The intelligent radiation dose detection method for the nuclear medicine diagnosis and treatment area according to claim 8, wherein the method comprises the following steps: and the peripheral module receives the control instruction sent by the central control module and completes corresponding operation according to the control instruction.
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