Sign In



Remember Me

MedlinePlus®

A service of the National Library of Medicine.

Resource Library


Powered by Dorland's Medical Dictionary for Healthcare Consumers
 

This information is provided by an independent source. Merck & Co., Inc. is not responsible for this content. Please discuss any and all treatment options with your healthcare professional. The manufacturer of a product generally has the most complete information about that product.
 
Return to Main Index >> How to Use  
 


Dorland Logo
A |  B |  C |  D |  E |  F |  G |  H |  I |  J |  K |  L |  M |  N |  O |  P |  Q |  R |  S |  T |  U |  V |  W |  X |  Y |  Z

 
ultrasonography (ul″trә-sә-nog´rә-fe)   a radiologic technique in which deep structures of the body are visualized by recording the reflections (echoes) of ultrasonic waves directed into the tissues. Frequencies in the range of one to ten million hertz are used. The lower frequencies provide a greater depth of penetration for examination of abdominal organs; those in the upper range provide less penetration and are generally used to examine more superficial structures such as the eye.




Elsevier Logo
Copyright 2007. An Elsevier publication. All rights reserved.
Click here for important legal information about Dorland's Medical Dictionary.

 
 
    Print This Page   Add To My Folder