Davies SPI REVIEW print part 2| 500 questions| with complete solutions

In order for distance measurements to be accurate in an ultrasound tissue phantom, the phantom sound propagation speed must be: A: 13 us/cm B: 1.54 m/s C: 154o m/s D: 1/2 the speed of sound in tissue E: Twice the speed of sound in soft tissue CORRECT ANSWERS: C: 1540 m/s You expanded the image sector width to improve visualization of a large mass. What can you do to maintain the same temporal resolution you had before your adjustment? A: Increase the digitization bit depth B: Increase the number of scan lines C: Decrease the number of pixels in the image matrix D: Decrease the number of focal zones E: Decrease the pulse repetition frequency CORRECT ANSWERS: D: Decrease the number of focal zones What information is present in the M-mode display? A: Time, motion patter, and amplitude B: Amplitude, frequency, and time C: Motion pattern, and frequency D: Time, motion pattern, and frequency E: Bandwidth, amplitude, frequency, time, and motion pattern CORRECT ANSWERS: A: Time, motion patter, and amplitude With A-mode, the strength of the echo signal is represented by: A: The brightness of the dot B: The brightness of the spike C: The distance between two spikes D: The distance between two dots E: The height of the spike CORRECT ANSWERS: E: The height of the spike What information is present in the A-mode display? A: Frequency bandwidth, amplitude, and reflector distance B: Time, amplitude, and motion pattern C: Amplitude and reflector distance D: Time, motion pattern, reflector distance, and frequency bandwidth E: Frequency shift, amplitude, and reflector distance CORRECT ANSWERS: C: Amplitude and reflector distance An M-mode display is most commonly used for what type of ultrasound imaging? A: Small parts B: Abdominal