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.
A Diagnostic Medical Sonographer is a medical imaging professional who uses ultrasound machinery to capture images for diagnosis and treatment of illness or injury.One common use of ultrasound is to look at fetuses in the womb and monitor their health and growth.ccording to The Bureau of Labor Statistics, the median annual salary for a diagnostic medical sonographer is $64,380 per year, or about $31 per hour.