Ultrasound
Ultrasound imaging, based on principles similar to SONAR developed during World War I for submarine tracking, wasn't applied in medicine until the late 1940s.
During the procedure, a transducer or probe is placed on the skin, emitting pulses of sound waves through the body. These waves create echoes as they interact with internal structures, which are then captured by the transducer and relayed to a computer. The echoes are analyzed and translated into real-time images displayed on a monitor, providing insights into the shape, size, and composition of organs and tissues.
Due to its ability to capture images in real time, ultrasound is particularly valuable for assessing blood flow and guiding needle biopsy procedures.
Before the procedure
Aortic/Abdominal
Nothing to eat, drink, chew, or smoke for six hours prior to your exam.
Pelvic/Obstetrical/Renal
A full bladder is necessary for the exam. Have breakfast and/or lunch. Women must drink at least 32 oz. of water, finishing one hour prior to your exam. Men must drink at least 16 oz. of water, finishing one hour prior to your exam. Do not empty your bladder.
What to expect during the procedure
Depending on the region under examination, you may need to wear a gown.
Before the procedure commences, the ultrasound technician will verify that any specific preparations have been adhered to. Subsequently, you'll be asked to recline on a comfortably cushioned examination table.
A small amount of gel will be applied to the area of interest. This gel is harmless and easily wiped away post-examination. It serves to eliminate air between the transducer (ultrasound probe) and your skin, ensuring efficient transmission of sound waves into your body.
The ultrasound technician will gently position the transducer on the area with gel and maneuver it slowly to capture optimal images. Adjusting the direction or angle of the probe enables the technician to obtain the highest quality images of the organ or tissue being evaluated.