Precision is key in the medical world. Therefore, every instrument a healthcare provider uses should be ready to deliver clear and accurate results. Ultrasonic transducers, for example, must be perfectly tuned to deliver detailed views of the inner workings of the human body.
Briefly, ultrasonic transducers convert electrical energy into sound waves. When applied to the body, these sound waves bounce back to the main device, creating an image of internal organs and more. Ultrasound technology is useful in various medical fields, perhaps most famously in obstetrics, but also in cardiology, radiology, and more.
Ensuring ultrasonic transducers function correctly is essential for obtaining accurate results. Here are a few tips for properly testing ultrasonic transducers.
Visual Inspection
The first step in any assessment is a visual inspection. Look over every part of the transducer in search of physical damage. Are there cracks or wear and tear in the casing? Is the cable in good shape, or has it begun to fray or show signs of distress? Is the transducer itself dirty or otherwise in poor shape?
Physical imperfections could lead to a loss in signal, interference, or erroneous readings. It may just be a matter of cleaning the device, but physical damage is a sure sign the transducer is in bad shape.
Electrical Testing
Electrical testing involves using an impedance meter and LCR reader. These devices will reveal whether the impedance and capacitance of the transducer meet manufacturer specifications. Any variations in the measurements may reveal issues regarding element failure, cable damage, and more. Schedule periodic electrical testing to identify problems well before using the transducer on a patient.
Acoustic Power Testing
How much energy is the transducer putting out? Acoustic power testing verifies the amount. Ensuring the acoustic output remains within the right range eliminates the possibility of deviations. Deviations affect the results, creating inaccurate images that can lead to the wrong diagnoses.
This is a more specialized test requiring specific equipment. Therefore, a trained technician should be the one to regularly conduct acoustic power testing.
Image Quality Evaluation
Once all the above tests have occurred, the sonographer or whoever is employing the transducer can perform an image quality evaluation. This evaluation involves scanning a quality assurance phantom, which is a unique device that simulates the human body. The sonographer can then review and assess the resulting image. They inspect it for a lack of clarity and uniformity and unusual artifacts that suggest the transducer is not working properly.
Those are just a few tips for properly testing ultrasonic transducers. While complete testing should be left to trained professionals, most medical personnel can learn to identify more obvious potential problems. Subject ultrasonic transducers to regular maintenance and calibration to extend their life and usefulness. If you’re considering testing, equipment upgrades or replacements, or options like refurbished ultrasound machines, contact All States Medical Equipment Distribution for more information and a consultation!