The characteristic response to ultrasound displayed by a particular tissue. The resonse which produces an acoustic shadow which can be seen on an ultrasound or echocardiogram.

(noun) an ultrasound picture has more "echotexture" than is normal for that organ and indicates some, nonspecific, abnormality. In practical terms, with the kidney it can be a sign of inflammation, scars, kidney stones, or any of a number of other abnormal things going on in the kidney. It must also be put together with other information (i.e. lab tests, physical exam and history) to interpret more precisely.

capacity of a structure in the path of an ultrasound beam to reflect back sound waves