Chapter 1/ First Class Flashcards
Medical Sonography
> 20,000 Hz
Echogenic
Tissue capable of producing an ECHO (light area)
Anechoic
ECHO-Free area (Black area)
Hyperechoic
Brighter than surrounding tissue
Hypoechoic
Darker than surrounding tissue
Isoechoic
Structures that are equal echodensity
Homogenous
Smooth ECHO texture
Heterogenous
Complex ECHO texture (speckles)
Cystic
Anechoic center. Well defined liquid wall. Black
Complex
Both Anechoic and Echogenic areas (Not defined and black)
Artifact
Anything that shows and image that is not accurate.
Doppler Ultrasound
Used to evaluate blood flow
Color Doppler
Color Coded presentation of information on gray scale images
Spectral Doppler
Doppler information is applied to loud speakers to display quantitative analysis
Vascular Structures
Veins, Arteries
Fat
Hypoechoic with irregular hyperechoic lines
Muscles
Heterogenous (mixture of hyperechoic lines and hypoechoic tissue)
Tendons
Predominantly hyperechoic technical artifact (Hypoechoic
Bone
Hyperechoic lines with hypoechoic shadows
Nerves
Both hyper and hypoechoic technical artifact
Parenchyma (Tissue)
Homogenoeous
Gain
Brightness
Depth
Distance
Sagittal/Longitudinal
Long stance on transducer (indicator at patients head)
Transverse/Axial
Wide stance on transducer (indicator at patients right side)
Transducer/Probe
The device that sends out sound waves to create images of the body
ECHO
A ultrasound that produces a picture of the heart and blood vessels
TGC
Time gain compensation. A setting to account for tissue attenuation
Pulsed Doppler
Using sound waves to measure blood flow
Color Gain/Doppler
Amplification adjustment of the doppler signals received
Focus
Clarity adjustment at a specific depth in an image
Zoom
Setting that allows the image to be magnified
Dual (Split Screen)
Allows the user to view multiple images of the ultrasound simultaneously
Resolution
The ability of an ultrasound to distinguish different structures
Cine Loop
A series of ultrasound images captured in sequence
Acoustic Window
The area of the body that allows an ultrasound to pass easily