echo-, ech-

The use of ultrasound in the investigation of the heart and great vessels and diagnosis of cardiovascular lesions.

An instrument that in a painless and noninvasive manner uses the differential transmission and reflection of ultrasonic waves to create a detailed visual image of the brain.

1. A record made by an echo-sounder.
2. A record obtained using high frequency acoustic reflection techniques in any one of the various display modes, especially an echocardiogram.

1. A device that records oceanic depths by means of sonic waves.
2. A similar device used in ultrasonography to examine internal body structures or to monitor fetal development.

A person who performs and interprets ultrasonographic examinations.

A form of agraphia in which a person cannot write spontaneously, but can write from dictation or from a copy.

A reference to aphasia in which the patient cannot express his/her thoughts in writing but who can copy a written or printed script.