Physics Test Ch. 12 and 13 Flashcards
When the crystals are defective, the entire image is destroyed with this type of transducer
Single crystal transducer. Mechanical transducer Pg 167
Which transducer creates a beam that is focused in all planes and at all depths?
annular phased array
What is the advantage of using a 1 1/2 dimensional array transducer?
Creates thinner beams with improved slice thickness ( or elevational resolution) over a greater range of depths p 190
What type of resolution is improved with a 1 1/2 dimensional array transducer?
Slice thickness and Elevational resolution Pg 188
What is the image shape of a vector array transducer?
Trapezoidal Pg 187
Which transducer has active elements arranged in a straight line?
Linear Pg 168
Which transducer has active elements arranged in circular rings?
Annular Pg 168
Which transducer has active elements arranged in an arched or bowed matter?
Convex Pg168
Phased array always means what?
Adjustable or multi-focused Pg 170
Linear switch transducer has what type of steering technique?
Also called linear sequential. Has electronic steering. Pg 187
What type of probe has dropout lines of image information from top to bottom?
Linear and convex Pg 187
Horizontal or side to side dropout occurs in which transducer type when crystals are bad?
Annular phased array. Pg187
Which transducer is designed to be mechanically steered and fixed with single focus?
Mechanical Pg187
The use of more active elements to receive reflections with a greater time of flight is called
Dynamic aperture? *found on a quizlet
What is the ultrasound machine that can display real time images and Doppler?
Duplex pg 313
The ability to accurately locate moving structures at any time is what kind of resolution?
Temporal resolution Pg 198
What will decrease temporal resolution?
Deeper imaging, which decrease frame rate and degrades temporal resolution Pg 200
Real-time imaging could be referred to as…?
Ultrasound “movie” Pg 197