ARDMS Breast Registry Review Ch. 1 Exam Questions With Verified Answers

ARDMS Breast Registry Review Ch. 1 Exam Questions With Verified Answers Acoustic Impedance The resistance that a material offers to sound wave travel. Amplitude The strength or height of a sound wave measured in decibels. Anechoic The appearance of having no internal echoes (echo free) on a sonographic image. Artifact An echo feature present or absent in a sonographic image that does not correspond to the presence or absence of a real structure. Eg. enhancement or shadowing. Attenuation The reduction of intensity (and amplitude) of a sound wave as it travels through a material. Attenuation is due to absorption, reflection, and scattering. Complex A structure in the body that contains both cystic and solid components. Cystic Any fluid filled structure in the body. Echogenic A structure or medium that produces echoes. Edge Shadowing Decreased echo amplitude distal to the edge of a structure. This artifact results from refraction of the sound beam. Enhancement Increased echo amplitude returning from regions lying beyond an object that causes little or no attenuation of the sound beam (typically a cystic structure). This artifact results in a brighter than normal appearance. Heterogeneous A structure that has an uneven texture (hypoechoic and hyperechoic echoes throughout). Synonym - non-uniform. Homogeneous Smooth uniform texture Hyperechoic Echoes are brighter than normal or brighter than surrounding tissues. Synonyms: Echodense, sonodense, sonopaque Hypoechoic Echoes are not as bright as normal or are less bright than surrounding structures. Ipsilateral On the same side. Contrlateral On the opposite side. Isoechoic Same echogenicity as another structure or the surrounding tissue. Noise Spurious echoes throughout the image. Real-time The scanning and display of sonographic images at a sufficiently rapid rate so that moving structures can be seen to move at