special subjects
Ultrasonography
Disadvantages of Ultrasonography
If the examiner inserts the transducer into the body for the ultrasonography, insertion of the transducer may cause some discomfort. Rarely, when a transducer is inserted, tissue is damaged, causing bleeding or infection. Bone or gas can block ultrasonography. Thus, using ultrasonography to obtain images of certain structures (those behind bone or gas) is difficult. 