Sonographic Terminology (Appearance 1)
Echotexture that is uniform composition throughout
What is Homogeneous?
Describes the portion of an image that appears echo free.
What is anechoic?
or sonolucent, echolucent
Reduction in echo strength of signals arising behind a strong reflector is called ________________
What is shadowing?
A transducer commonly used for vascular, MSK, thyroid studies, etc.
What is Linear?
Describes tissue or organ structures with several different echo characteristics
Describe the relationship between speed and density
What is if density increases, speed decreases?
Describes image echoes that are not as bright as surrounding tissue.
What is hypoechoic?
An increase in amplitude of echoes located behind a weakly attenuated structure is called ____________.
Commonly used for Abdominal, OBGYN (TA) and Bladder scans.
What is Curvilinear or Curved?
Structure with internal echoes is described as _______________.
Describes image echoes that are brighter than surrounding tissues.
What is hyperechoic?
Multiple, equally spaced echoes caused by bouncing of the sound waves between two strong reflectors positioned parallel to the ultrasound beam is called ________________.
What is reverberation?
What is Phased Array?
3 criteria to be considered a true cyst
What is 1) Anechoic
2) well defined thin smooth walls
3) enhancement
Describe the relationship between stiffness and speed
What is as stiffness increases, speed increases?
Describes structures that are of equal echogenicity
What is Isoechoic?
Reverberation with the spaces squeezed out is called ______________.
Fits into small spaces for superficial and small structures
A combination of a cystic and solid mass is described as ____________.
The average speed of sound in soft tissue is ______________.
What is 1540 m/s or 1.54 mm/us
A sound wave weakens in intensity, power, and amplitude as it propagates through a medium. this is called __________________.
What is Attenuation?
If the beam passes from a medium of one
speed into a medium of a greater speed,
then the calculated distance will be less
than the actual distance, causing the echo
to be erroneously displayed too close to
the transducer or more anteriorly. This is called ___________________.
What is Propagation Speed Error?
High frequency transducers produce images with ______________ resolution, and ____________ penetration of the sound wave. (Looking for increase or decrease)
What is
Increased; Decreased?