Spiral CT machine of reasonable discussion of installation and use

To reasonable use spiral CT, must start from the installation of the machine to use normally, take the necessary measures of rationalization, it is necessary to let the machines work in a good environment, and to let the operator know machine some principles for the future work of the operator to correct use of machinery in order to make the most of the machine while the machine operating costs to a minimum.

In recent years, spiral CT in all levels of the hospital quick, effective improves hospital radiographic diagnostic level and quality of work for clinical medical and lay a good foundation.

However, due to the popularity of spiral CT too fast, many just have spiral CT of the hospital, especially district County Hospital, how reasonable use machines that allow machines to maximize efficiency, the machine's loss is reduced to the lowest level, there exist many problems. Plus CT distributors and production plants for hospital use staff training are not in place, many because cannot reasonably use the machine to machine, causing unnecessary consumption, increased machine failure rate and running costs. Therefore require CT user to spiral CT machine works, features necessary to understand, and be constant in practical work to explore some of the experiences that make your machine maximum stay in a good working condition.

The City currently has a spiral CT, mostly in 2000 after go-live, according to use, I summarized the following experiences for your reference.

1 room selection and installation requirements

CT room should be built around vibration of small, no serious interference with the electromagnetic field, low noise, air purity high environment, if possible, you should also consider leaving distribution room near and patient access and machinery installation convenience, the major components in the engine room placement to balance machine safety, maintenance have access to open space, patient, doctor easy and good ventilation, and other aspects.

To minimize the work area of mutual interference, such as voltage regulators, power distribution equipment, workstations, camera, processor, injector and other equipment location.

Cable laying should avoid AC electromagnetic fields (transformers, inductors, motors, etc.), signal cables and power cord should be shielded, tap the laying.

There needs to be done if necessary Tin lining of cable ditch, stamped, and measures against rodents. Cable if too long, must not be laid, the waveform is folded or ring cable.

The best configuration for your computer system, to ensure that the UPS computer system is functioning properly.

To prevent a sudden power failure data loss and corruption. CT system power trunk capacity should be greater than unit rated power of 10%-20%, CT machine must have a good grounding system, its resistance is less than 2 Ω, and every half year. But all the ground-to-ground protection resistance between metal parts and components also must be less than 0 Ω.

2 post and want to fully preheating

Machine after each time you power on for scanning before the first patient, make sure that the machine has sufficient warm-up on the grounds that let the tube filament full heating to prevent the tube in the heater inadequate State into the scan status, because it is extremely easy to damage to the tube, at the same time as the circuit no preheating, also affect the quality of the image.

3 maintain a clean environment, and the inside of the machine

The machine run later to daily clean room environment health, keep the environment clean and periodically clean the inside of the machine so that dust, dust as little pollution machine in electrical installations and cooling vents, reduce circuit failure rate, reduce dust pollution on the slip ring and slip ring and friction between the carbon brush, maintain good ventilation system.

4 vulnerable parts regularly check

In accordance with the work of the machine and check the number of patients, periodic maintenance cleaning slip ring and brush, so that article 3 of the premise we scan 5000 patients, slip ring go around 40 000 cycles of clean time slip ring and brush, and promptly examine the degree of wear of the brush, the brush on a replacement of an identity, when the mill to or close to replace the identity of certain replacement, prevent carbon brush in copper wire and slip ring contact damage slip ring.

Periodically check the regular rotation of parts, note the lubrication condition is good.

5 promptly begin scanning the timely closure of scanning

Typically, the machine can spiral exposure scan frame scanning system has entered a State of uniform rotation, its speed is very fast, this time the ball tube filament heating into the full load condition, operation interface and keyboard will be prompted when the operator began to command the machine in time, such as exposure scan is not timely start exposure, slip ring and brush is out there doing unnecessary wear and tear, tube filament was there doing unnecessary full load heating.

The scan is finished, to leaving a scan status, because after exiting scan status, tube filament for operation from saturated to preheat, slip ring had stopped turning, so that you can extend the tube, slip ring and brush life. Means to reduce slip ring of rotating coils and bulb exposure times of general control within the 10: 1, the smaller the better. This ratio to see specific machine, different manufacturers in the calculation of the exposure times differently. The following table is a United States GE company HIS-PEED DXI single slice CT of several different exposure mode, slip ring rotating coils and bulb exposure times of minimum ratio, and a mix of adrenal scan because the patient is not good repeat scan results. Spiral scanning machine exposure count table count as 1s an exposure, axis when counting table by scanning each out of an image or a time exposure, each TOP positioning like meter exposure time.

According to the above-mentioned principle, when the operator to the scanning application, carefully understand the patient's condition, according to the severity of the worked out reasonably accurate scanning program, focusing on a scan position to design good scanning program, try to make the exposure scan during a scheduled scan sequence in the end, reduce during the scanning process unnecessary stoppages

, Supplementary and wait. In particular, the effects on the respiratory organs and positioning, prefer to scan range designed a little bigger, avoid unnecessary additional scanning, because supplementary scan process, the machine wait loss is great. This requires diagnosis diagnostic doctor should be responsible for and understand the scanning technology to learn more about some machine works, break the technician is responsible only for scanning, the doctor was only responsible for the diagnosis of old work mode, the best diagnosis doctor to the patient personally for scanning operations, it is necessary to prevent missing patient lesions and to avoid unreasonable scanning exposure to minimize patient x-ray irradiation dose and economic burdens, done while also reducing the loss of the machine.

6 more simple machines it is to learn and research scan techniques

Because high-grade machine of powerful software, scanning and reconstruction fast, manipulate it very handy, especially the multi-slice CT, scan the images in a week or more to rebuild, and for most of the cases examine content with very little in terms of the relative skills requirements of the low point.

But for low end machine, especially poor spiral ability, it is necessary to note that the machine scanning method and scanning skills used, try to scan when programming in one or more continuous scan sequence was completed, but regardless of the grade or low end machine, to design the shortest amount of time to complete the scan. The only way to put the machine in unnecessary loss of effective control in the relative minimum horizontal lines. 7 control of room temperature and humidity

Requirements within the scope of the provisions, the room temperature and humidity fluctuations, thus stabilizing circuit and detector performance, can keep the image quality and reduce artifacts, but also reduces the number of calibration tube.

Temperature and humidity is too high can easily damage the circuit board, but the humidity is too low slip ring signal transmission is prone to interference, so don't randomly change machine calibration of temperature and humidity ranges. Experience tells us that the humidity control in the upper machine calibration.

8 system equipment to grounding

Spiral CT scan system and other ancillary equipment to grounding.

Because now the spiral CT all attached devices are connected with the network, if the wrong equipment grounding, most likely on a different device produces a potential difference between ports, so you can easily cause damage to the network interface, and sometimes damage the host interface circuit board, especially on some far-away from the host device, make sure that the ground wire to the ground and system grounding. Each of the server power connector socket to connect the ground wire to the ground, the system cannot figure seems easy but not received.