Ultrasound 101 Week 1

Anechoic

absence of echoes

Hypoechoic

less echogenic than surrounding tissue

Isoechoic

same echogenicity as surrounding tissue

Hyperechoic

more echogenic than surrounding tissue

homoegeneous

structure or tissue with a uniform, consistent echo texture

heterogeneous

Tissue or organ with a non uniform, inconsistent echotexture. Appears patchy, mothed or irregular

Acoustic shadowing

A dark, anechoic artifacts behind a structure that reflects or absorbs nearly all ultrasound waves.

Echogenicity

Refers to a structure's ability to reflect sound waves, with terms like hypoechoic (few echoes), hyperechoic (many echoes), and anechoic (no echoes).

Acoustic enhancement

An area of increased brightness beneath a fluid-filled structure due to minimal attenuation of sound waves.

Attenuation

The reduction in the intensity or amplitude of a sound wave caused by absorption, scattering or reflection of the sound wave as it travels through the tissue. Higher attenuation results in loss of penetration and echo. Attenuation is due to sound wave scatter, reflection and absorption.

Cin loop

The US system memory stores a recent sequence of images in a series of frames allowing a continuous loop of images to be reviewed.

Far field

the area in the acoustic window that is furthest from the transducer.

near field

the are in the acoustic window that is closest to the transducer.

anterior

closest to patients skin

posterior

deeper

inferior

toward patients feet

superior

toward the patients head.

tunica intima

innermost layer

Tunica media

Muscular middle layer

tunica adventitia

external layer; carries nerves and VASO VASORUM

vaso vasorum

A network of tiny vessels

that supply oxygen and

nutrients to the cells of

the walls of large blood

vessels. The blood

supply within the blood

supply