Obstetric Ultrasound–Second and Third Trimester
Obstetric Ultrasound–Second and Third Trimester US is widely used in the evaluation of pregnancy with more than 70% of all pregnancies in the United States undergoing sonographic evaluation [1]. Indications…
Abdomen Ultrasound
Abdomen Ultrasound Imaging Technique The abdomen is examined with sector or curved array transducers using frequencies of 5.0 to 2.25 MHz. The highest frequency that allows adequate penetration is used…
Vascular Ultrasound
Vascular Ultrasound Vascular US is based upon the use of the Doppler effect first described in 1842 by the Austrian mathematician Johann Christian Doppler. As applied to diagnostic US, the…