Two-year programs are most prevalent. Look for a program that is accredited by the Commission on Accreditation of Allied Health Education Programs (CAAHEP) . For information on how to become a registered diagnostic medical sonographer, see the American Registry for Diagnostic Medical Sonography.verview. Diagnostic medical sonographers use sound waves to generate images used for assessing and diagnosing various medical conditions. Many people associate sonography with pregnancy. It's how a fetus can be seen in the womb.
The porta hepatis, or hilum of the liver, is a deep, short, transverse fissure that passes across the left. posterior aspect of the undersurface of the right. lobe of the liver. It separates the caudate lobe and. process from the quadrate lobe and meets the. left sagittal fossa perpendicularly (1).
Portacaval node is a lymph node that is in the portacaval space. This is a narow space shielded anteriorly by the pancreas, stomach, gallbladder & liver & posteriorly by the inferior vena cana. (Porta hepatis is an area on the undersurface of liver) Normal node at this site is usually 1cm or less in size.