Noise sources of Medical MRI devices and how to reduce them?
Publish Time: 2024-07-26
The noise sources of medical MRI (magnetic resonance imaging) equipment and their reduction measures are important issues of concern in the medical field. The noise generated by Medical MRI devices during imaging mainly comes from the following aspects:
Noise sources
Gradient magnetic field switching: During the examination of Medical MRI Device, the gradient magnetic field will be continuously switched to obtain images at different levels. This switching causes rapid changes in the intensity and direction of the magnetic field, resulting in high-frequency, sharp noise, which is the main source of MRI noise.
RF pulses: In order to excite the magnetization of hydrogen nuclei, Medical MRI Devices will emit RF pulses. These pulses will produce short, high-intensity noises, similar to "clicks" or "buzzing", which may occur multiple times during the examination, although they are short-lived.
Equipment operation: The MRI scanner itself will also generate noise during operation, such as the noise of the cooling fan and the running sound of mechanical parts. These noises are usually continuous and low-frequency, which may increase the patient's irritability.
Noise reduction measures
Wearing protective devices: Provide patients with earplugs or MRI-specific earmuffs, which can significantly reduce the impact of noise on patients. According to research, if used properly, the noise can be reduced by 10-30 decibels.
Technology update: With the continuous advancement of technology, new Medical MRI Devices may adopt more advanced noise control technologies, such as low-noise gradient coils, optimized cooling systems, etc., to further reduce the noise level during the examination.
Environmental optimization: In the design of MRI examination rooms, sound insulation materials can be considered to reduce the spread of noise. At the same time, keep the examination room quiet and comfortable to avoid interference from external noise.
Patient education: Explain to patients before the examination that noise during MRI examinations is normal, and tell them how to deal with these noises, such as deep breathing, relaxation, etc. to reduce discomfort.
In summary, the noise of Medical MRI Device mainly comes from gradient magnetic field switching, radio frequency pulses, and equipment operation. In order to reduce the impact of noise on patients, a variety of measures can be taken, such as wearing protective devices, technology updates, environmental optimization, and patient education. These measures not only help to improve the patient's examination experience, but also ensure the smooth progress of MRI examinations.
