Acoustic impedance - Study guides, Class notes & Summaries

____ is defined as specific area or location where Doppler shift info is being obtained. A. spectral broadening B. nyquist limit C. sample volume D. spectral window -answer- C. sample volume Spatial resolution is: A. the minimum reflector separation required to produce separate echos. B. highest with linear phased arrays. C. the weakest reflected signal the transducer can receive D. another term for slice thickness resolution -answer- A. the minumum reflector separation required to pr...

what improves temporal resolution -answer- low line density, high frame rate, narrow sector line, fewer pulse per frame which of the following is true when the dynamic aperature is increased -answer- near zone length increases 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 -answer- DICOM the beam of an unfocus...

SPI exam review questions & answers 2024 When using a 3-6MHz transducer, which frequency will offer the best penetration? - ANSWER-3MHz Which transducer component improves lateral resolution? - ANSWER-pulser 3. Mirrors and lenses can be used to ________________. • A. improve sound transmission into the body • B. increase the PRF of the transducer • C. electronically focus the US beam • D. mechanically focus the US beam - ANSWER-D. mechanically focus the US beam 4. Wh...

Of the following sound wave modes, which one has multiple or varying wave velocities? a. Longitudinal waves b. Shear waves c. Transverse waves d. Lamb waves - ️️Lamb waves Which of the following would be considered application(s) of ultrasonic techniques? a. Determination of a materials elastic modulus b. Study of a materials metallurgical structure c. Measurement of a materials thickness d. All of the above - ️️All of the above The only significant sound wave mode that wil...

2024 CNIM Exam New Full Exam Questions and Answers ( Included ) 100% Correct 1. Which of the following would best enhance resolution of evoked potentialwaveforms? Answer: Increase number of averaged stimuli 2. What is the typical MINIMUM common mode rejection ratio of in-phasesignals recommended for evoked potential instruments? Answer: 10,000:1 3. Which of the following cranial nerves is most at risk during acoustic neuro-ma surgery? Answer: CN VII 4. The impedance of cup electrodes ...

Of the following sound wave modes, which one has multiple or varying wave velocities? a. Longitudinal waves b. Shear waves c. Transverse waves d. Lamb waves - ️️Lamb waves Which of the following would be considered application(s) of ultrasonic techniques? a. Determination of a materials elastic modulus b. Study of a materials metallurgical structure c. Measurement of a materials thickness d. All of the above - ️️All of the above The only significant sound wave mode that wil...

What test is to measure middle ear function and asses the integrity of the middle ear muscle reflex immittance audiometry This test assess middle ear function tympanometry The MEMR (middle ear muscle reflex) pathway is assessed with threshold and decay measurements Immittance is an objective test which means what the patient is not required to participate The flow of acoustic energy through the ME system is represented by immittance What is impedance the opposition of energy flow through th...

Which of the following would best enhance resolution of evoked potential waveforms? - Increase number of averaged stimuli What is the typical MINIMUM common mode rejection ratio of in-phase signals recommended for evoked potential instruments? - 10,000:1 Which of the following cranial nerves is most at risk during acoustic neuroma surgery? - CN VII The impedance of cup electrodes is: - Lower than needle electrodes because of their size Amplitude of an evoked potential depends on which of...

reflection return of the ultrasound wave to the transducer from a smooth surface when does the greatest amount of reflection occur when the incident beam is perpendicular to structure (specular reflection) scatter deflection of ultrasound waves from small structures (red blood cells scatter sound) refraction deflection of Ultrasound waves due to media with varied acoustic impedance attenuation loss of Ultrasound signal due to absorption in tissues as it travels ...

A patient brings his hearing aids in to be cleaned and sets them on the counter what type of transmission should the receptionist be concerned about - ️️Indirect Transmission How does an osteoma present - ️️Bony growth in external auditory canal This is a correct answer Most common cause of hearing loss at 4000 Hz - ️️Acoustic Trauma A mother comes in worried her hearing is worse since the birth of her first kid what is likely happening - ️️Otosclerosis A large dip in the...