Ultrasound
High-frequency sound waves. Ultra-sound waves can be bounced off tissues by using special devices. The echoes are then converted into a picture called a sonogram. Ultrasound imaging allows an inside view of soft tissues and body
cavities without the use of invasive techniques. Ultrasound is often used to examine a fetus during pregnancy. There is no evidence that any danger occurs from ultrasound during pregnancy.
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- Ultrasound, transvaginal
The creation of a picture called a sonogram by sending sound waves out through a probe inserted into the vagina. The waves bounce off the ovaries and other anatomical structures, and a computer uses the echoes to create a visual image. Abbreviated TVS.
- Ultrasound/Ultrasonography
A test in which high-frequency sound waves (ultrasound) are bounced off tissues and the echoes are converted into a picture (sonogram).
- Ultraviolet A
One of the three types of invisible light rays (together with ultraviolet B and ultraviolet C) given off by the sun. Although ultraviolet C is the most dangerous type of ultraviolet light in terms of its potential to harm life on earth, it cannot penetrate earth’s protective ozone layer. Therefore, it poses no threat to […]
- Ultraviolet B
One of the three types of invisible light rays (together with ultraviolet A and ultraviolet C) given off by the sun. Although ultraviolet C is the most dangerous type of ultraviolet light in terms of its potential to harm life on earth, it cannot penetrate earth’s protective ozone layer. Therefore, it poses no threat to […]
- Ultraviolet C
One of the three types of invisible light rays (together with ultraviolet A and ultraviolet B) given off by the sun. Although ultraviolet C is the most dangerous type of ultraviolet light in terms of its potential to harm life on earth, it cannot penetrate earth’s protective ozone layer. Therefore, it poses no threat to […]