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.
Diagnostic ultrasound, also called sonography or diagnostic medical sonography, is an imaging method that uses high-frequency sound waves to produce images of structures within your body.The images can provide valuable information for diagnosing and treating a variety of diseases and conditions.Most ultrasound examinations are done using a sonar device outside your body, though some ultrasound examinations involve placing a device inside your body.he images can provide valuable information for diagnosing and treating a variety of diseases and conditions. Most ultrasound examinations are done using a sonar device outside your body, though some ultrasound examinations involve placing a device inside your body.