Diagnostic medical sonographers must complete 24 continuing education credits every two years to remain certified. To maintain ARDMS credentials, sonographers must earn at least 30 continuing medical education (CME) credits in a 3-year period and pay an annual renewal fee.nly a few states require sonographers to be licensed. While state requirements can vary, a professional certification from a national credentialing organization is often required to become licensed.
[ edit intro ]. The Allegheny Portage Railroad was the section of the Pennsylvania Main Line of Public Works that traversed the Allegheny Mountains in Pennsylvania. It consisted of alternating level and inclined plane stretches of rail, pulling canal boats on carriages.
The Northern Pacific Railway (reporting mark NP) was a transcontinental railroad that operated across the northern tier of the western United States from Minnesota to the Pacific Coast.