SPI exam 2| 111 questions| with complete solutions

128-256 CORRECT ANSWERS: A cross-section image is made up of many scanlines. How many scanlines are there in one frame? Electromagnet wave CORRECT ANSWERS: Which type of wave is able to travel in both vacuum and different media Mechanical longitudinal wave CORRECT ANSWERS: Which type of wave is an ultrasound waves? Perpendicular CORRECT ANSWERS: In a mechanical transverse wave,, particles move____to the sound source Parallel CORRECT ANSWERS: Any mechanical longitudinal waves, particles move_____to the sound source Rarefaction CORRECT ANSWERS: What represents scarcity of particle density? Pressure, density, particle motion, temperature CORRECT ANSWERS: Acoustic variables: 2 - 12 MHz CORRECT ANSWERS: What is a typical frequency transducer used for imaging? Diagnostic Ultrasound CORRECT ANSWERS: A sound greater than 1,000,000 Hz Ultrasound CORRECT ANSWERS: Sound greater than 20khz Infra-sound CORRECT ANSWERS: Less than 20 Hz Hearing Range CORRECT ANSWERS: 20 Hz to 20 kHz Air CORRECT ANSWERS: 330 m/s Lungs CORRECT ANSWERS: 300 m/s - 1200 m/s Fat CORRECT ANSWERS: 1450 m/s Soft tissue CORRECT ANSWERS: 1540 m/s Bone CORRECT ANSWERS: Greater than 2000 m/s 5 Hz CORRECT ANSWERS: If the period for certain wave was 1/5 second, what is its frequency? 2 MHz, rather than 15 MHz CORRECT ANSWERS: For a sonographer to scan deep tissue, which of the following transducers frequency would be the best