Lack of sound transmission causing a blank spot on the image
It is a radiology term for ultrasound finding. Usu. shadowing means definitely gallstone. Non-shadowing means it may not be gallstone. For details, see the article: http://radiology.rsna.org/content/137/1/181.full.pdf+html
There are quite many things that the word "shadowing" may refer to. It can be file shadowing, job shadowing, projective shadowing, variable shadowing, or speech shadowing. Information about all above shadowing related things can be found in wikipedia.
Posterior acoustic shadowing is an ultrasound phenomenon where a dense structure, such as a tumor or calcification, reflects and absorbs sound waves, resulting in a dark area behind it on the ultrasound image. This occurs because the sound waves cannot penetrate the dense material, leading to a reduction in the echoes received from the tissues located deeper. It is often used diagnostically to identify the presence of certain conditions, as well as to assess the characteristics of lesions.
Yes, gallstones can be effectively visualized on an abdominal ultrasound. The ultrasound uses sound waves to create images of the abdominal organs, and gallstones typically appear as echogenic (bright) areas with shadowing behind them due to their density. This imaging technique is commonly used because it is non-invasive and does not involve radiation. It is a primary method for diagnosing gallstones.
Barium typically does not appear on ultrasound because it is a dense material that does not transmit sound waves effectively. Instead, barium is primarily used in radiographic imaging, such as X-rays or CT scans, to enhance the visibility of the gastrointestinal tract. In ultrasound, barium can cause artifacts or shadowing, which may obscure underlying structures rather than providing clear images. Thus, it is not a standard contrast agent for ultrasound examinations.
In ultrasound imaging, air appears as a distinct, hyperechoic (bright) area due to its low density and high acoustic impedance compared to surrounding tissues. This results in strong reflection of the ultrasound waves, creating a shadowing effect behind the air-filled structures. Consequently, ultrasound cannot penetrate air effectively, making it challenging to visualize deeper structures beyond air-filled spaces, such as the lungs or gastrointestinal tract.
B GEN-M mean in ultrasound
what does the term MI mean on a dogs heart ultrasound
Ultrasound is typically abbreviated u/s, US, or sono.U/S or US is the medical abbreviation for ultrasound.
shadowing is when you copy someone. for example, if someone draws a black cat the person who is shadowing is the person who copies the person who drew the black cat.
Presumably 20.
I suggest you ask the person who did the ultrasound as I have never heard this.