recording of the position and motion of the heart walls or internal structures of the heart and neighboring tissue by the echo obtained from beams of ultrasonic waves directed through the chest wall.
Echocardiography is based on the same principle as the oceanographic technique of depth-sounding; that is, it utilizes ultrasound to delineate anatomical structures by recording on a graph the e...
see contrast echocardiography.
the record produced by echoencephalography.
a diagnostic technique in which pulses of ultrasonic waves are beamed through the head from both sides, and echoes from the midline structures of the brain are recorded graphically; shifts from any midline may indicate a centrally placed mass.
in ultrasonography, giving rise to reflections (echoes) of ultrasound waves; hyperechoic.
the characteristic ability of a tissue or substance to reflect sound waves and produce echoes. Bone and gas are most echogenic and fluids such as urine and bile the least. Organ parenchyma and soft tissues are intermediate, but each differs slightly from the other and relative characteristics are known.
the record made by echography.
ultrasonography; the use of ultrasound as a diagnostic aid. Ultrasound waves are directed at the tissues, and a record is made, as on an oscilloscope, of the waves reflected back through the tissues, which indicate interfaces of different acoustic densities and thus differentiate between solid and cystic structures.
permitting the passage of ultrasonic waves without giving rise to echoes, the representative areas appearing black on the sonogram.
the combined use of echocardiography and phonocardiography.