A Window to the Human Body Flashcards
Sonography
medical imaging with ultrasound
The diagnostic ultrasound imaging (sonography) method has two parts:
(1) Sending ____ of ____ into the body, and (2) using _____ received from the anatomy to produce a _____ of that anatomy
(1) pulses, ultrasound
(2) echoes, image
Ultrasound gray-scale scans are _____-_____ images of tissue cross sections and volumes.
pulse-echo
The brightness of an echo, as presented on the display, represents the ____ of the echo.
strength
A linear scan is composed of many ______, _____ scan lines.
vertical, parallel
A sector scan is composed of many scan lines with a common _____.
origin
A linear scan has a ______ shape.
rectangular
The shape of a sector scan is similar to a _____ of _____.
slice, pie
A sector scan can have a _____ or a ______ top.
pointed, curved
The ____ is the interface between the patient and the instrument.
transducer
Transducers generate ultrasound _____ and receive returning _____.
pulses, echos
The Doppler effect is a change in echo _____.
frequency
The motion that produces the Doppler effect is that of the _______.
reflector
Color-Doppler displays can present Doppler- ____ and Doppler- ____ information in color.
shift, power
