Doppler shift - Study guides, Class notes & Summaries

This exam is entirely multiple choice or true/false. A=T, B=F TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) The photosphere is about 100 times the diameter of the Earth, and large sunspots are larger than our whole planet. 1) 2) Granulation is the most obvious proof of solar convective energy transport. 2) 3) The solar corona is much cooler than the Sun's surface, hence we must wait for a total solar eclipse to glimpse it with the naked eye. 3)...

The direction of the Doppler shift determines: A. the peak velocity of the flow B. the color Doppler hue C. the average velocity of the flow D. the color Doppler luminance -answer- B. the color Doppler hue Color Hue - perceived color used to demonstrate direction (red and blue or positive and negative shift) What is the primary factor that determines the resistance characteristics of the arterial signal displayed by PW Doppler? A. vessel course and location B. branch number C. part it...

Vocabulary : Doppler shift, frequency, pitch, sonic boom, sound waves, wavelength Highlight your answers in either GREEN / BLUE / OR YELLOW Prior Knowledge Questions (Do these BEFORE using the Gizmo .) Have you ever heard a siren on a moving ambulance, fire truck, or police car? If so, what happens to the sound as the vehicle passes by? Sometimes when cars are passing I usually hear the car running and sometimes I hear the horn of the car. The change in the sound that you hear is called t...

ARDMS,SPI Exam (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct| Grade A Q: Multiple echoes, equally spaced originating from a gas bubble is called: a. comet tail b. ring down c. slice thickness artifact d. multipath Answer: b. ring down Q: An increase in red blood cell velocity will_____ the Doppler Shift: a. increase b. decrease c. not change d. cannot be predicted Answer: a. increase Q: The primary advantage of CW Doppler is: a. ...

Gizmo Doppler shift questions and answers 2023/2024 Doppler shift: - Answer the apparent change in the wavelength and frequency of sound waves that is caused by the movement of the sound source, observer, or both. Frequency: - Answer the number of complete wavelengths that pass a point in a given time. The frequency is the Hertz. One Hz is one event per ____. - Answer second The shorter the ____ of a wave is, the greater its frequency. Longer ____(same) correspond to lower frequencie...

C 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 to which acoustic variable is penetration depth inversely related? A.frequency B.wavelength C.period D.propagation speed B which imaging mode requires a broadband transducer? A.continuous wave doppler B.Pulsed wave doppler C.color flow imaging D.harmo...

Frequencies used in transthoracic imaging are usually in the range of ____________. Frequencies used in transesophageal imaging are usually in the range of ______________. A) 3-6 MHz;6-8 MHz B) 3-6 MHz; 5-7 MHz C) 2.5-4 MHz; 5-7 MHz D) 1-3 MHz; 6-8 MHz - 2.5-4 MHz; 5-7 MHz Which of the following will aid in visualization of the endocardium? A) Increased transducer frequency B) Larger sector size C) Increased wall filter D) Agitated saline contrast - Increased transducer frequency-this ...

a patient presents with an order for a lower extremity venous doppler exam to rule out DVT. this patient should be evaluated in the _____ position in order to _______ - - semi-erect - increase hydrostatic pressure when evaluating a suspected thoracic outlet syndrome, a PPG exam can be performed with the sensor placed on the ____ or a doppler exam can be performed with transducer place _____ - - 2nd digit - on the radial artery which of the following will increase the amplitude of a Digital...

When does simplified Bernoulli equation not apply in aortic valve assessment? Ans- When proximal velocity is > 1.5 m/sec Doppler frequency shift equation Ans- Doppler shift = (2 x velocity of sample relative to source x transducer frequency x cos[θ]) / speed of sound in the tissue Will lower or higher transducer frequency minimize aliasing? Ans- Lower frequency, because for the same detected velocity, the frequency shift will be lower in absolute magnitude for a lower-frequency tran...

SPI Exam Review Questions & Answers 2024 ultrasound imaging type in which pulses are reflected and used to produce a display - ANSWER-pulsed wave brightness of the dots on image - ANSWER-amplitude round-trip travel time per cm in soft tissue - ANSWER-13 microseconds A line produced on a display that represents ultrasonic echoes returning from the body. A sonographic image is composed of many such lines. - ANSWER-scan line Type of image presented in a rectangular format. - Each ...