Medical ultrasound scanners are important tools in medical imaging diagnosis and play an irreplaceable role in the diagnosis and treatment of many diseases. However, to ensure its accuracy and reliability, it is necessary to regularly calibrate and maintain it. This article will explore the calibration and maintenance strategies of medical ultrasound scanners to ensure their long-term, stable, and accurate operation.

1、 Calibration of medical ultrasound scanners

Purpose of calibration

The calibration of medical ultrasound scanners is to ensure the accuracy and consistency of their measurements. The calibration process includes calibrating the geometric parameters, sound velocity, attenuation and other indicators of the equipment to eliminate the influence of the equipment itself and environmental factors on the measurement results.

Calibration method

(1) Geometric parameter calibration

Geometric parameter calibration includes calibration of probe angle, position, and focal length. The accuracy of these parameters directly affects the scanning results. Generally, known standards such as planar reflectors are used for calibration, and the angle and position of the probe are adjusted based on the principles of ultrasonic reflection and diffusion to achieve accurate measurement.

(2) Sound speed calibration

Sound speed calibration mainly determines whether the sound speed used by the equipment is accurate. By measuring a standard substance with known sound velocity (such as water) and comparing its actual sound velocity with the measured value of the equipment, any deviation needs to be corrected.

(3) Attenuation calibration

Attenuation calibration is to determine whether the signal attenuation level of the device is accurate. Usually, a standard substance with a known attenuation coefficient (such as glass fiber) is used for calibration, and the measured values of the equipment are compared with the actual attenuation coefficient. If there is a deviation, it needs to be corrected.

2、 Maintenance of medical ultrasound scanners

Daily maintenance

Daily maintenance includes daily cleaning, organization, and inspection. Before starting daily work, the surface of the equipment should be cleaned to avoid the impact of dust and stains on the measurement results. At the same time, it is necessary to check whether the equipment starts normally and whether the probe has any abnormal phenomena such as cracks and bubbles.

Regular maintenance

Regular maintenance includes cleaning, lubrication, and replacement of internal components of the equipment. It is generally recommended to conduct a comprehensive inspection of the equipment every quarter, including replacing the probe protective film, adjusting the geometric parameters of the equipment, etc. In addition, comprehensive maintenance should be carried out once a year, including recalibration of equipment parameters such as sound speed and attenuation, to ensure the accuracy of the equipment.

Troubleshooting and Preventive Maintenance

For faults that occur, they should be immediately stopped and professional personnel should be sought for troubleshooting. Do not disassemble and repair on your own to avoid further damage. At the same time, preventive maintenance should be carried out regularly based on the usage of the equipment, such as replacing vulnerable parts, adjusting mechanical components, etc., to prevent equipment failures.

3、 Suggestions and countermeasures

Establish a sound maintenance system

Hospitals should establish a comprehensive maintenance system, specifying equipment calibration cycles, maintenance items, and operational procedures. Regularly inspect and maintain the equipment to ensure its accuracy and stability.

Strengthen operator training

Operators should undergo professional training and be familiar with the performance, operation, and maintenance methods of the equipment. During the operation process, the operating procedures should be followed to avoid damage caused by misoperation.

Pay attention to device updates and upgrades

With the continuous development of technology, medical ultrasound scanners are also constantly being upgraded and improved. Hospitals should pay attention to the updating and upgrading information of equipment, and timely upgrade and upgrade to improve the measurement accuracy and reliability of equipment.

conclusion

The calibration and maintenance of medical ultrasound scanners are key steps in maintaining equipment accuracy. By conducting regular calibration and maintenance, the measurement accuracy and stability of the equipment can be effectively improved, providing a reliable basis for doctors' diagnosis. Hospitals should attach importance to the calibration and maintenance of equipment, establish a sound maintenance system, strengthen operator training, and focus on equipment updates and upgrades to ensure the long-term, stable, and accurate operation of medical ultrasound scanners.