Damping in a transducer - Study guides, Class notes & Summaries

Which of the following is the standard protocol for digital imaging that allows compatibility and communication between computers, workstations, and network hardware provided by various manufacturers of CT, MRI, and ultrasound equipment? - Answer DICOM The spatial length - Answer usually decreases with higher frequency Axial resolution is improved by - Answer damping Lateral resolution is improved by - Answer decreased The beam of an unfocused transducer diverges - Answer i...

What is enhancement caused by? - ANS weakly attenuating structures What is the multipath artifact? - ANS artifact caused by the sound beam bouncing off several different reflectors What is the typical value of PRF in diagnostic ultrasound? - ANS 1000-10,000 Hz or 1-10 KHz What are specular reflections? - ANS reflections that occur when the sound impinges upon a large, smooth reflector at a 90 degree angle. What are non-specular reflections? - ANS ...

SPI Practice (ARDMS A & B) Exam 79 Questions with Verified Answers C - CORRECT ANSWER What is dynamic aperture? A.aperture that varies with transmit frequency B.aperture that decreases as a function of time C.aperture that increases with increasing focal length D.aperture that changes as a function of frame rate A - CORRECT ANSWER to which acoustic variable is penetration depth inversely related? A.frequency B.wavelength C.period D.propagation speed B - CORRECT ANSWER which im...

ARDMS- SPI Questions and Answers with Certified Solutions The horizontal axis, or x-axis Runs side to side The vertical axis, or y-axis Runs up and down Unrelated Two items that are not associated Related or Proportional Two items that are associated or affiliated However, the relationship between the items does not have to be specified Directly related or Directly proportional Two items that are associated such that when one item increases, the other increases Inversely related or inversel...

Which of the following do the source and the medium determine? a. duty factor b. frequency c. propagation speed d. axial resolution - ️️d. Axial resolution is affected by all of the following EXCEPT a. frequency b. damping c. spatial pulse length d. focusing - ️️d. Damping in a transducer a. reduces the number of cycles in a pulse and increases the quality factor b. increases the number of cycles in a pulse and increases penetration c. causes poor axial and lateral...

ARDMS SPI Exam 60 Questions with Verified Answers Which gain will increase the risk of bioeffects? a. transmit b. receive c. gain d. overall gain - CORRECT ANSWER a. transmit Which of the following is considered the memory of an ultrasound instrument? a. pulser b. transducer c. receiver d. beam former e. digital scan converter f. display monitor - CORRECT ANSWER e. digital scan converter Spectral broadening suggest: a. laminar flow b. turbulent flow c. flow away from the ...

TMC EXAM PRACTICE QUESTIONS WITH 100% CORRECT ANSWERS COMPLETE SOLUTION (GRADED A+ 2023- 2024) A COPD patient receiving volume-controlled A/C ventilation at a rate of 15 and a VT of 650 mL exhibits signs of air trapping (auto-PEEP). Which of the following alternatives would you recommend to help overcome this problem? 1. add an end-inspiratory pause 2. switch to SIMV and decrease the rate 3. increase the inspiratory flow 2 and 3 only 1, 2, and 3 1 and 3 only 1 and 2 only. Ans- 2 and 3 ...

SPI ULTRASOUND REGISTRY REVIEW QUESTIONS AND ANSWERS GRADED A SPL wavelength x # of cycles With phased array transducers, the transmitted sound beam is steered by Varying the timing of pulses to the individual piezoelectric elements What type of wave is sound? mechanical and longitudinal The Frequency ranges for Ultrasound are: > 20,000 Hz (20kHz) The speed of sound in soft tissue is: 1540 m/s Linear sequence Array transducer that fires the elements in groups Unit for Wavelength is mill...

ARDMS SPI Practice Test A & B - Questions and Answers Which parameter would change on a phantom test if the spatial pulse length were made longer? A. axial resolution B. lateral resolution C. horizontal distance resignation D. sensitivity If the ultrasound machine comes in contact with a patient’s body fluids, what should be done? A. remove the machine from use for the day B. use an approved disinfectant solution to clean it C. call the manufacturer to see what they would do Which parameter i...

Which of the following do the source and the medium determine? a. duty factor b. frequency c. propagation speed d. axial resolution CORRECT ANSWERS: d. Axial resolution is affected by all of the following EXCEPT a. frequency b. damping c. spatial pulse length d. focusing CORRECT ANSWERS: d. Damping in a transducer a. reduces the number of cycles in a pulse and increases the quality factor b. increases the number of cycles in a pulse and increases penetration c. causes po...