anechogenic

anechogenic

tissues that do not reflect ultrasound, e.g. water, blood
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A small amount of anechogenic liquid was reported in the tendon sheath region, as described by REEF et al.
The joint capsule (JC) was observed in the distal radius and the proximal row of carpal bones, and was characterized as an anechogenic layer over the bone, in accordance with the findings of REEF et al.
An anechogenic structure does not produce echoes, instead it transmits waves on to more deeply situated tissues.
A follicular cyst can be differentiated from a luteal cyst by its thin wall and uniformly anechogenic follicular fluid (Ginther, 1998).
In case of endometritis-pyometritis, the contents of uterus may vary in appearance as anechogenic fluid in black, to presence of echogenic material floating in a black background, to a purulent exudate that is echogenic in appearance and similar to surrounding tissue or isoechogenic.
CT imaging is the next step to show anechogenic cystic change with thin partitions.
Three ultrasound aspects are found- Hypoechoic is the most frequent, followed by heterogenous & anechogenic.
In salivary glands affected by this condition, hypoechogenic or anechogenic areas with slightly irregular and poorly defined limits can be identified within them, suggesting the existence of abscesses (7).
Sonohysterography (SHG) consists of transvaginal sonography (TVS) with concomitant instillation of sterile anechogenic contrast medium (commonly normal saline) into the uterine cavity by means of a transcervical catheter (1).
Ultrasound examination revealed a normal sized right, active ovary (some follicles between 15 and 25 mm, but no corpus luteum) and an enlarged left ovary containing a large anechogenic cystic structure.