X-ray photography is the most common imaging examination in clinical practice, and X-ray examinations are performed almost every moment. In recent years, the most outstanding performance in this field has been the development of digital X-ray imaging technology. The digital technology has won the appreciation of the vast number of technical and medical personnel in the imaging department with the advantages of superior image quality, lower average irradiation dose, quicker working efficiency, convenient and flexible post-processing method, and the development is extremely rapid. Especially the development and popularization of DR. Common DR imaging technologies include DR systems based on line scan digitization technology, DR systems based on amorphous silicon flat panel detectors, DR systems based on amorphous selenium flat panel detectors, and DR systems based on fluorescent plates + CCDs. At the same time, DR is an X-ray photography equipment integrating X-ray technology, digital acquisition technology and automatic control technology. It has some basic technical attributes of X-ray and electronic precision equipment. Therefore, in terms of use and maintenance, no matter what kind of technical imaging DR system, there are strict and common requirements and characteristics. If there are negligences and mistakes, it may cause images to be imaged, collected, transmitted and printed. The failure, or the quality of the image is degraded, making the image unusable for diagnosis, and may even cause machine failure to cause inconvenience to the work, so its significance is no small matter. In this article, we discuss some methods for the rational use and daily maintenance of DR from the most basic point for reference.
First, DR equipment on and off DR open, shutdown, although it seems to be a simple operation, but for DR equipment, it has an important impact on the incidence of failure and the service life of the equipment. So don't wait for it. From the point of view of equipment failure, the proportion of failures at startup and after shutdown is still relatively high. The phrase we often hear is: Yesterday the machine was still fine, and it was broken today. This sentence explains how much the switch has an impact on the device. We know that precision electronic equipment, especially DR equipment, has strict environmental requirements. The temperature is generally around 22 °C, the humidity is generally around 60%, and the room purification requirements are relatively high. And requires constant temperature and humidity. And our computer room conditions can do this and it is difficult to keep it, because our traffic is really big. Another sense of the impact of the environment on the equipment is still relatively weak in our minds. In fact, the environment of the computer room has a great relationship with our opening and closing. In the environment of too cold or too hot or too wet, it may cause the machine to malfunction. Therefore, before starting the machine, we should first put the air conditioner in the room. The dehumidifier is turned on, and then turned on when the room environment meets the requirements of the equipment. This does not take much time to delay, but it has a multiplier effect on protecting the machine to extend the life of the machine. The reason is that it is not difficult to find that electronic components are prone to malfunctions under cold and hot conditions.
Shut down more attention, first of all can not be regarded as a simple direct cut off the power supply, should first exit the system, then cut off the power, so as to avoid software and data loss. It should be shut down after work and unattended. If it is a machine on duty, it is necessary to turn off the X-ray host and the rack and bed power supply when unattended. This is mainly based on security considerations. X-ray machine and its control equipment are high-voltage electrical appliances. If the machine works for a long time, it will easily cause damage to components. Especially in the case of short circuit, if the safety protection grounding is not good or fails, the large current generated by the short circuit cannot be fast. If released, it may cause an accident. In addition, in daily work, if an emergency situation occurs, it is necessary to press the emergency stop switch in time, which is equivalent to directly cutting off the power supply. Although it is not desirable, it is a last resort. We should pay attention to cultivating this awareness and familiar with the emergency stop. The position of the switch, so as not to be in a hurry, has unnecessary consequences. The shutdown of the DR after a long period of continuous operation is more important. The machine will generate a lot of heat after continuous operation for a long time, especially the tube. At this time, if the heat of the shutdown is not slow, the heat is dissipated slowly without the help of the cooling fan. Electronic components, including the tube filament, can be in a hot environment for a long time, which is prone to failure or affects the service life. This is one of the reasons why the machine broke down the next day. Therefore, after the machine stops working (exposure), it will wait for a while, so that the cooling fan can continue to work for a while, and heat the machine, especially the tube, which is good for protecting the machine and prolonging the service life of the tube.
Second, the use and correction of the X-ray centerline In the filming, the use of the X-ray centerline is very important, especially DR photography. The imaging mechanism of DR is actually how many records of X-ray quantum detection of the detector after passing through the human body, while the DR detector, whether it is a flat panel or a detector of CCD structure, has a certain size area of ​​the pixel. If the center of the X-ray hitting the pixel is not correct, it may cause the X-ray quantum number detected by the pixel to be inaccurate, and may cause geometric distortion of the image, thereby affecting the quality of the image. Therefore, the application of the X-ray center line Be accurate. The X-ray centerline is actually the alignment of the center of the window of the X-ray tube with the center of the detector, while the dimmer locates the crosshair, which is not the center of the X-ray in the true sense. Only after correction can it be combined with X. The actual center line of the line is the same. Generally speaking, the machine has been calibrated after installation and debugging. However, after a period of use, the center line may be offset. Therefore, pay attention to the periodic correction of the X-ray center line. To correct from the center of the window of the X-ray tube, and then to the correction of the center line of the crosshair of the dimmer, it is not accurate to correct only the center line of the dilator.
Third, the daily maintenance of the X-ray tube X-ray tube is the key part of the X-ray machine, the rational use of the maintenance of the x-ray machine tube is essential. The correction of X-ray tube is the first problem to be paid attention to. The dose of X-ray is now supervised by national laws. The authoritative inspection department of the country conducts dose detection on the Medical Equipment of the hospital every year, including imaging equipment, X-ray machine. The Kv value, mA value, time value, surface radiation dose, etc. are all items of detection. For DR, the correction of the X-ray tube is related to whether the dose value of the X-ray is accurate. X-ray tube calibration of DR equipment is done by software. It is easy to complete the calibration of X-ray tube without high-voltage measuring equipment. It is very easy for qualified hospitals to do it themselves. It is very important to do this regularly. Necessary, because the above parameters will change with the change of the emission characteristics of the X-ray tube filament, which will become inaccurate. Therefore, the X-ray tube calibration work should be carried out every year, before the supervision and inspection, so as not to send you Certificate of conformity. Secondly, the cleaning and heat dissipation of the X-ray tube, the surface dust of the X-ray tube directly affects the heat dissipation of the arena, and the flow of people in our hospital is large, and the dust brought by the flow is also a lot, so pay attention to keep X Clean the wire tube and clean it. In addition, the X-ray tube is now equipped with a heat capacity protection device, but some manufacturers short-circuit it to make it not work when installing the machine. I think this is not desirable. From the perspective of protecting the tube, He should also be connected to make it work.
Fourth, the cleaning of the whole machine mentioned the cleaning of the X-ray tube and the cause of dust. However, the cleaning of the whole machine is also very important. We have many hospitals. After the work, the cleaning of the machine room and the cleaning of the machine surface are also linked to the bonus. The importance of sanitation work. Surface cleaning is very important, it can play a role in cooling the machine, and it can also enhance the image of the department, leaving a good impression on the patient and giving the patient a comfortable and harmonious feeling. However, it is not enough to clean the surface of the machine, and the internal cleaning of the machine is also very important. The internal cleaning of the machine mainly cleans the dust on the internal circuit board. The dust on the circuit board not only affects the heat dissipation, but also may cause short circuit of the components, causing machine failure and the like. In short, the dust hazard on the board is a big concern. Cleaning the inside of the machine, especially the dust on the circuit board, should be responsible for the maintenance of the equipment responsible for the equipment, and pay attention to prevent static electricity.
In summary, from the aspects we can do, the reasonable use and daily maintenance of DR are explained. Although some of our machines are guaranteed to be repaired, when the machine fails, the manufacturer may not be able to come to the repair in time, and it will take time to repair. Therefore, reducing machine failure and optimizing the use of the machine should be our image workers. Focus on the key points, there must be awareness in this area in mind, and you should not just use it. Moreover, in addition to the machine's frequent failures, in addition to affecting the work, there may be some impact on the user of this machine. People may say how the person uses the machine, and do not care about the equipment at all. The machine is always bad in his hand. Therefore, in order to ensure the normal operation of the equipment and extend the service life of the machine, we must develop a care machine, use the machine reasonably, and scientifically maintain the machine habits to maximize the efficiency of the equipment.
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