physics ch 1 terms

sonography

the use of ultrasound in medical anatomic and flow imaging

doppler ultrasound

the detection, quantization, and evaluation of tissue motion and blood flow by using the doppler effect with ultrasound

ultrasound

sound that is higher in pitch than the range of human hearing

sonographer

an allied health professional who acquires the image

transducer

probe; generates the ultrasound pulses and recieves the returning echoes

intrument

system

sonologist

physician who interprets the images

image

a reproduction, representation or imitation of the physical form of a person or object

gray-scale image

produced by the brightness of each dot corresponds to the echo strength

operating principle 1

describes how ultrasound images are formed line by line sending out a sound pulse and recieving itsechoes one at a time, creating a dot on the screen that develops a scan line

scan line

a series of dots; one line of echo information

linear image

an anatomic image presented in a rectangular display

sector image

an anatomic image presented in a pie-slice format

how to display linear image

cross sectional images are produced with vertical parallel scan lines that are so close together that they cannot be identified individually

linear image

what is this?

sector image

what is this?

operating principle 2

involves the transducer sending unfocused sound pulses into the body and then receiving the echoes to form an image; more sophisticated

volume imaging

the conversion of 2D imaging into 3D

doppler information is presented in ....

audible, color-doppler, and spectral doppler forms