acoustic

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acoustic

[ah-ko̳s´tik]

pertaining to sound or hearing.

acoustic reflex test measurement of the acoustic reflex threshold; used to differentiate between conductive and sensorineural deafness and to diagnose acoustic neuroma.

a·cous·tic

(ă-kūs'tik),

Pertaining to sound, for example, acoustic trauma, acoustic wave.

[Gr. akoustikos]

acoustic

/acous·tic/ (ah-kldbomacs´tik) relating to sound or hearing.

acoustic

[əko̅o̅s′tik]

Etymology: Gk, akouein, to hear

pertaining to sound or hearing. Also acoustical.

Acoustic

Pertaining or referring to sound.

acoustic

adjective Referring to sound

a·cous·tic

, acoustical (ă-kūs'tik, -tik-ăl)

Pertaining to hearing and the perception of sound.

[G. akoustikos]

acoustic

pertaining to hearing.

acoustic

relating to sound or hearing.

acoustic coupler

used in the low speed transmission of data over a telephone line.

acoustic enhancement

an artifact seen in ultrasound examination. There is an area of increased brightness underneath fluid resulting from the lack of impedance when sound waves pass through fluid and increased echoes from underlying structures.

acoustic gel

see coupling.

acoustic nerve

see vestibulocochlear. See also Table 14.

acoustic reflex test

used primarily in humans to differentiate between sensorineural and conductive hearing loss.

acoustic shadowing

an artifact seen in ultrasound imaging in which an intensely echogenic line appears at the surface of structures which block the passage of sound waves.

acoustic window

the body surface area selected for application of the ultrasound transducer, through which sound waves will be transmitted. Consideration must be given to underlying bone or gas-filled structures which would impair image quality.

References in periodicals archive ?

appears as a hypoechoic, ill-defined, heterogeneous mass that sometimes produces posterior acoustic shadowing.

Breast Cancer: Diagnosis, Treatment and Prognosis

At sonography, both masses appear as hypoechoic lesions with irregular, spiculated or lobulated margins, internal heterogeneity, a long axis perpendicular to the chest wall and variable posterior acoustic shadowing (Figures 14,15).

Breast masses in children and adolescents

Posterior acoustic shadowing occurs when the sound wave intersects a highly reflective surface or is absorbed by tissue.

Posterior acoustic shadowing also can occur with benign macrocalcifications and, although uncommon, with fibroadenomas.

The Role of Ultrasound In Breast Imaging

Ultrasound typically shows a well-defined hyperechoic or isoechoic mass with a hypoechoic rim and posterior acoustic shadowing.

Benign pilomatricoma of the breast

Sonography shows single or multiple poorly marginated hyopechoic lesions with or without distal acoustic shadowing [6].

Role of ultrasound in inflammatory diseases of liver in tropical paediatrics population

No posterior acoustic shadowing was present, and it measured at least 30 x 40 x 45 mm in size (Figs 1a and 1b).

Unusual presentation and inconclusive biopsy render fibroadenoma in two young females a diagnostic dilemma

Some areas demonstrated acoustic shadowing, in keeping with a focus of calcification.

Radiological case of the month: Elkhalil Alymlahi, MD and Rachida Dafiri, PhD

Scattered calcified calculi with dense posterior acoustic shadowing was present [Figure.

Giant submental hemangioma: a rare neck mass

Posterior acoustic shadowing of at least one of the suspected calcifications was required to consider the finding present.

High resolution sonographic evaluation of palpable thyroid lesions with histopathological correlation--a prospective study