Referenties onder meer:

www3.interscience.wiley.com/journal/121681356/abstract
www.cardiovascularultrasound.com/content/7/1/3

Try googling them, Ann.

terms that are used to describe the appearance of ultrasound images should relate to a tissue's ECHO INTENSITY, attenuation and image texture. These terms describe the ultrasound appearance relative to surrounding tissue and other structures.

Here we'll refer to echo intensity only.

Areas of high echo intensity are referred to as echogenic, hyperechoic or echo rich.

Areas of low echo intensity may be properly termed echo poor or hypoechoic ....

.... whereas areas with no echos are said to be echo free or anechoic.

Terms using density, such as high or low echo density, are best avoided, because a tissue's ECHOGENICITY is not always related to its density.

Blood or fluid that does not contain cells or debris is black on ultrasound images with a white-on-black display because few echoes are returned.

As fluid gains viscosity from increased protein, cells or debris it becomes progressively more echogenic.

Normal parenchymal organs and body tissues are visualized as various shades of gray.

Fat is generally thought to be highly echogenic, but low-level echos are returned from fat in certain areas of the body

Connective tissue usually appears highly echogenic, but certain uniform areas of fibrosis with few interfaces may actually appear relatively echo free



http://books.google.nl/books?id=LUst9bY0TVgC&pg=PA12&lpg=PA1...