Sometime in the past few million years, collapse at the top of the cave and surface erosion created the natural entrance of Carlsbad Cavern. This opened previously hidden underground cave passageways to the world above for the first time.
The Society of Diagnostic Medical Sonography (SDMS) defines sonography as diagnostic medical procedure that uses high frequency sound waves (ultrasound) to produce dynamic visual images of organs, tissues, or blood flow inside the body. This type of procedure is often referred to as a sonogram or ultrasound scan.
As a diagnostic medical sonographer, you could be the one answering this or a host of other life-changing medical questions with the help of ultrasound technology. Beyond babies, sonograms are used to help diagnose other medical conditions by creating images of body organs and tissues.