Specular reflectors - Study guides, Class notes & Summaries

SPI PRACTICE EXAM LATEST QUIZZES & ANS!!

SPI Practice Test Questions and Answers 2023 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 penet...

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...

The typical frame rate of an Ultrasound system is? - >>>Between 30 Hz and 100 Hz Temporal resolution is synonymous with frame rate. Typical frame rates in imaging systems are 30-100 Hz. - >>>The temporal resolution or frame rate = 1/(time to scan 1 frame). Frame rate can drop down to 5 Hz. Pulse duration is related to bandwidth how? - >>>Pulse Duration = 1 / Bandwidth Specular reflectors have physical dimensions that are what size in relation to the wavelength...

A sound wave is - Answer- mechanical, longitudinal A compression area of a sound wave is - Answer- high pressure, high density A rarefaction area of a sound wave is - Answer- low pressure, low density Which is considered an acoustic variable - Answer- pressure Which is a unit for pressure - Answer- N/m2 Which is a unit for density - Answer- lbs/cm3 Which wave propagates in a medium - Answer- sound The range for ultrasound is - Answer- greater than 20KHz ____ is the number...

SPI Board Exam Review (GB) 600+ Complete Q&A (2022/2023.) __________ is the reciprocal of period. A. inverse period B. PRP C. frequency D. propagation speed - C. Frequency A bouquet has 30 flowers. The size of the bouquet is decreased by a factor of 3. How many flowers remain? A. 27 B. 0 C. 10 D. 15 - C. 10 A byte is composed of __ bits. A word is composed of ___ bytes. A. 2, 2 B. 8, 2 C. 16, 16 D. 8, 16 - B. 8, 2 (a string of eight bits of computer memory is a byte. Two b...

ARDMS SPI Practice Exam B Questions and Answers Already Passed Which artifact is illustrated by this image? a) Shadowing b) Side Lobe c) Reverberation d) Mirroring What is increased if the pulse duration is decreased? a) Bandwidth b) Line Density c) Frame Rate d) Duty Factor What is the most appropriate action for the sonographer to take when receiving a verbal order for an exam? a) Deny performance of the exam until a written request is received b) Seek approval from supervisor c) Verbally re...

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...

ARDMS PRACTICE SPI (B) Questions and Answers 2023 In which direction is the blood flowing in this image? A. Right to left B. Left to right C. Bidirectional D.Indeterminate What is the Nyquist limit if a pulse-wave Doppler instrument has a PRF of 16kHz? A. 32kHz B. 10kHz C. 8kHz D. 5kHz Which adjustment would eliminate the color artifact demonstrated in this image? A. Decrease color scale B. Decrease color packet scale C. Increase color packet scale D. Increase color sc...

ARDMS SPI Study Guide Questions and Answers 2023 One reason why focused beams with low intensities are less likely to cause bioeffects is that a focused beam is less efficient in heating a large mass of tissue to a critical temperature. True Typically, the sonographer can adjust the compression function of a receiver. True Mean frequency is calculated from weighted sum of frequencies in the power spectrum. True Refraction always occurs at the interface between two media ...