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What is Ultrasound?

Ultrasound is cyclic sound pressure with a frequency greater than the upper limit of human hearing. Although this limit varies from person to person, it is approximately 20 kilohertz (20,000 hertz) in healthy, young adults. The production of ultrasound is used in many different fields, typically to penetrate a medium and measure the reflection signature or supply focused energy. The reflection signature can reveal details about the inner structure of the medium, a property also used by animals such as bats for hunting. The most well known application of ultrasound is its use in sonography to produce pictures of fetuses in the human womb. There are a vast number of other applications as well.

Types of UltrasoundPreparation
Ultrasound-Whole Abdomen4 hrs fasting ( To assess gall bladder & pancreas ) & full bladder.
Ultrasound-Upper Abdomen4 hrs fasting ( To assess gall bladder & pancreas )
Ultrasound-Pelvis-Trans Abdominal StudyFull bladder.
Ultrasound-Pelvis-Trans Vaginal StudyEmpty bladder.
Follicular studyEmpty bladder.
Ultrasound-I TrimesterFull bladder.
Ultrasound-II TrimesterEmpty bladder.
Ultrasound-III TrimesterEmpty bladder.
Ultrasound-Small partsNo preparations required.
Ultrasound-ThyroidNo preparations required.
Ultrasound-ScrotalNo preparations required.
Ultrasound-Trans Rectal StudyEmpty bladder.
Ultrasound-Trans CranialNo preparations required.
Ultrasound-ShoulderNo preparations required.
Ultrasound-chestNo preparations required.
Ultrasound-BreastNo preparations required.