When imaging the body with ultrasound, ultrasound transducers are a key component of the imaging process. Without a transducer, the image cannot be obtained.
There are many types of ultrasound transducers and they vary in size and shape and depending on what part of the body that is being imaged will dictate what type of transducer will be used.
If you are having an abdominal ultrasound, most likely a curvilinear transducer will be used with a frequency of anywhere from 2.0 megahertz to 7.5 megahertz.
If you are having an ultrasound of your thyroid, most likely the transducer will have a frequency of 10 megahertz because the thyroid is not a deep structure and therefore will need a high frequency transducer.
If you are having an early pregnancy ultrasound, most likely a transvaginal ultrasound transducer will be used. This type of transducer is inserted into the vagina approximately 1 - 2 inches without a full bladder and gives the best access to an early pregnancy.
If you are having an ultrasound for pregnancy after 9 weeks gestation, than a curvilinear transducer maybe used with a frequency of 3.5 - 5 megahertz.
Ultrasound transducers will be used according to the study and how deep the tissue is that is being visualized. Most of them are adjustable during the scan but are limited within the device themselves. In other words, one transducer may have a range of 3.5 to 5.0 megahertz but it is not often that a transducer will have a range of 2.0 to 10 megahertz.
Diagnostic ultrasound machines must have transducers in order to see an image. An image cannot be obtained without gel on the skin. The gel works as a coupling to help with image visualization. It is always water based and will not stain your clothing.
The transvaginal probe is used with a condom or probe cover and gel is also applied to the tip of the probe both inside the cover and outside prior to being inserted. Again without the gel, the image will not be obtained.
It is not up to you to worry about what kind of ultrasound machine is used or the transducer used for your exam, the ultrasound tech will know exactly what to do and how to use it effectively.
Make sure that when you are going to have an ultrasound study that you listen carefully and adhere to any preparation instructions that are given to you.
It is important that you are prepared for the test you are having or your test maybe rescheduled. There is a reason for any kind of prep that they tell you to do even though you may think that you don't need it, leave it to the professionals to know what is best for you ultrasound exam.
For example:
Imaging of the gallbladder is done through an abdominal ultrasound; the gallbladder itself shrinks when you eat or drink and therefore cannot be seen by ultrasound. It is therefore recommended that you stay NPO for 12 hours prior to your exam, which means nothing to eat or drink for 12 hours before your ultrasound.
Other preps maybe to fill your bladder prior to having a pelvic ultrasound. This is up to the clinic performing the test. Some of them still have patients drink lots of water and of course hold it while others that feel that filling the bladder does not enhance the visibility and so it is not necessary.
This article was brought to you by Michelle Reynolds. She brings information and solutions for those who are having ultrasounds. Find out more about Ultrasound Transducers or just visit her web site at www.ultrasoundtransducers.org
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