DeWitt Echocardiography CH 3: Intro to TTE Questions with Correct Answers
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Module
Echocardiography
Institution
Echocardiography
Transthoracic Echocardiogram (TTE or echo) Correct Answer-a non-invasive, real time ultrasound of the heart acquired via the PT's chest wall that allows us to study the anatomy, motion, and blood flow through the heart and great vessels
TTE Advantages Correct Answer-minimal staff & equipment, pa...
DeWitt Echocardiography CH 3: Intro to TTE
Questions with Correct Answers
Transthoracic Echocardiogram (TTE or echo) Correct Answer-a non-
invasive, real time ultrasound of the heart acquired via the PT's chest
wall that allows us to study the anatomy, motion, and blood flow
through the heart and great vessels
TTE Contraindications Correct Answer-combative PT, interstitial air
from chest trauma, morbidly obese, PT refuses the exam
Ultrasound (Hz) Correct Answer-> 20,000 Hz
Frame Rate Correct Answer-the # of images per second; want the
highest frame rate possible
Transducer Correct Answer-crystals = lead zirconate titanate (PZT);
transmits and receives ultrasound pulses along a scan line --> shape of
, beam; near field offers best resolution (focus is reaches, then beam
diameter increases); # of PZT elements = # of scan lines; more scan lines
--> better resolution; each frame shows a complete set of scan lines
Matching Layer Correct Answer-within the PZT crystals and transducer;
works to decrease the acoustic impedance b/w transducer and skin so
more sound is transmitted into body
Medium Correct Answer-ultrasonic gel
*air is not a good conductor
Ultrasonic Transducer and Waves Correct Answer-pulse leaves
transducer and travels into the body and collides with the structures in its
path (pericardium, walls, valves, RBCs); some pulses reflect off and
return to the transducer for processing ("echoing") while others
continue; pulses are sent to US unit where that are processed into gray
scale, fan-shaped image called "sector"
Most Labs Utilize Digital Storage Correct Answer-sonographer acquires
digital sectors (images) on US unit, then transfers the images offline to a
PC where measurements are acquired, calculations are performed, and a
preliminary report is generated
*finally, cardiologist reads the echo and finalizes the report
Transducer Frequency Range (MHz)
Adult TTE Frequency Range (MHz)
Pediatric TTE Frequency Range (MHz) Correct Answer-2-12 MHz
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