DAVIES SPI: IV. Pulse-Echo Instrumentation (30% of ARDMS)Exam with verified question and answers

DAVIES SPI: IV. Pulse-Echo Instrumentation (30% of ARDMS)Exam with verified question and answers 1. What is a typical frame rate for B-mode real-time imaging? A. 1-9 kHz B. 10-50 Hz C. 100-200 MHz D. 200-300 Hz E. 0.05-0.9 Hz: B. 10-50 Hz Frame rates are displayed in terms of Hz, a unit of frequency equal to one cycle per second. Although frame rates vary, typical real-time frame rates range from 10 Hz to 50 Hz. If the frame rate is 30 Hz, that means 30 frames are produced in one second. Faster frame rates are found with cardiac imaging 2. What component is necessary for a real-time B-mode scanner but is not present in A-mode scanner? A. Clock B. Transmitter C. Transducer D. Scan converter E. Receiver: D. Scan converter 3. You have increased the output power by 10 dB. The signal intensity has: A. Doubled B. Tripled C. Quadrupled D. Increased by a factor of 10 E. Increased by a factor of 100: D. Increased by a factor of 10 Increasing a control by 3 dB corresponds to a doubling of the setting. If it is increased by 10 dB, it has been increased by a factor of 10