Damping coefficient - Study guides, Class notes & Summaries

ARDMS SPI EXAM STUDY GUIDE 180 Questions with Verified Answers In soft tissue, if the frequency of a wave is increased the Propagation Speed (PS) will... - CORRECT ANSWER Remain the Same because stiffness and density affect Propagation Speed. What is the audible range? - CORRECT ANSWER 20-20,000Hz >20,000Hz=Ultrasound Frequency is measured in - CORRECT ANSWER Hertz (Hz) is Cycles per Second Not affected by sonographer Increase Frequency; Decrease Depth A period is t...

Which of the following do the source and the medium determine? a. duty factor b. frequency c. propagation speed d. axial resolution - Answer- d. Axial resolution is affected by all of the following EXCEPT a. frequency b. damping c. spatial pulse length d. focusing - Answer- 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 lat...

SPI ARDMS QUESTIONS AND ANSWERS 2023 What type of wave is sound? mechanical and longitudinal The frequency ranges for ultrasound are: >20 kHz The speed of sound in soft tissue is: 1540 m/s which of the following transducers fires the elements in groups? A. Linear sequenced array B. Phased array C. Continuous-wave transducer D. Single-element transducer A Enhancement is caused by** weakly attenuating structures wavelength in material having a propag...

Absorption CORRECT ANSWERS: The conversion of sound energy to heat Acoustic speckle CORRECT ANSWERS: The interference pattern caused by scatters and produces the granular appearance of tissue on a sonographic image Amplitude CORRECT ANSWERS: The maximum or minimum deviation of an acoustic variable from the average value of that variable; the strength of the reflector Attenuation CORRECT ANSWERS: A decrease in the amplitude, power, and intensity of the sound beam as sound travels thr...

ARDMS Exam 69 Questions with Verified Answers Tendonitis of the thumb - CORRECT ANSWER de Quervain's disease - Gripping of transducer What is trigger finger? - CORRECT ANSWER inflammation of tendon sheath in the finger due to repeated gripping of the transducer What does the FDA do for ultrasound? - CORRECT ANSWER Regulates instruments according to application, output intensities, and TI/MI What does the AIUM recommend for ultrasound? - CORRECT ANSWER Prudent use of US in clinica...

Synthesis of Poly(ethyl acrylate) by Single Electron Transfer-Degenerative Chain Transfer Living Radical Polymerization in Water Catalyzed by Na2S2O4 JORGE F. J. COELHO,1,2 ERICA Y. CARVALHO,1 DINA S. MARQUES,1 ANATOLIY V. POPOV,3 VIRGIL PERCEC,4 PEDRO M. F. O. GONC¸ ALVES,2 M. H. GIL1 1Chemical Engineering Department, University of Coimbra, Po´lo II, Pinhal de Marrocos, 3030-290 Coimbra, Portugal 2CIRES SA – Companhia Industrial de Resinas Sinte´ticas, Apartado 20, Samoqueiro – Av...

Ultrasound Physics - Mock Exam Questions for SPI Updated 2022/23. Which of the following transducers will have the worst axial resolution? a. Vector array, 3 MHz b. Linear Sequential Array, 6 MHZ c. Linear Phased Array 7.5 MHZ d. Annular Array, 6 MHz - A sound wave is traveling in the body and propagates from muscle to air. What percentage of the sound wave is most likely reflected at the muscle-air boundary? a. 0.5% b. 75% c. 25% d. 5% e. 99% - Which of the following lists i...

SPI Practice Test Questions and answers. 100% Accurate. Rated A 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 ...

AQA A level AS Physics Paper 1(2023)100%correct answers Current - CORRECT ANSWER-Rate of flow of charge Coulomb - CORRECT ANSWER-The amount of charge passing a point when a current of 1A flows for 1s Potential difference - CORRECT ANSWER-The work done per unit charge in moving a small point positive charge between two points Threshold Voltage for a Diode - CORRECT ANSWER-The voltage at which a current will begin to flow at, assumed to be +0.6V if not stated Reverse Bias - CORRECT AN...

SPI Exam Pool Questions and answers. 100% Accurate, graded A+. What is described as the ability of an object to resist compression and relates to the hardness of a medium? - stiffness An increase in PRF would lead to - an increase in DF what has the higher propagation speed? air, bone, soft tissue or water - bone what has a lower propagation speed? water, soft tissue, bone or lung tissue - lung tissue as imaging depth increases, the PRF must - decrease what law describes the...