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.
10 hilariously insightful foreign words. Diagnostic imaging is a form of medical imaging that is performed with the intention of diagnosing disease, in contrast with medical imaging conducted to monitor the progress of a disease, or to guide a medical procedure.