Froggy Jumps Ultrasound Quiz ChallengeVersion en ligne Test your knowledge of Pulsed Ultrasound Principles with this quiz game! par Elaine Nichols 1 What is the typical frequency range of pulsed ultrasound used in medical imaging? a 1-15 MHz b 100-200 Hz c 20-50 kHz 2 What is the term for the time between the start of one pulse and the start of the next pulse in pulsed ultrasound? a Pulse Repetition Period b Pulse Duration c Pulse Amplitude 3 What is the unit of measurement for the intensity of ultrasound waves? a Hz b W/cm² c dB 4 What is the term for the percentage of time that ultrasound is actually on during the pulse period? a Duty Factor b Pulse Repetition Frequency c Pulse Duration 5 What is the term for the distance traveled by a pulse during the pulse duration? a Pulse Repetition Period b Temporal Resolution c Spatial Pulse Length 6 What is the term for the time it takes for a pulse to travel to and return from an object? a Pulse-Echo Time b Pulse Repetition Frequency c Pulse Duration 7 What is the term for the number of pulses emitted by the transducer per second? a Duty Factor b Pulse Duration c Pulse Repetition Frequency 8 What is the term for the maximum distance that an ultrasound pulse can travel into the body? a Depth of Penetration b Temporal Resolution c Pulse Duration 9 What is the term for the time it takes for a pulse to travel to and return from the transducer surface? a Pulse Duration b Pulse Repetition Period c Pulse-Echo Time 10 What is the term for the ability to distinguish two structures that are close together in time? a Spatial Pulse Length b Depth of Penetration c Temporal Resolution 11 What is the frequency range of continuous ultrasound typically used in medical imaging? a 50-500 Hz b 1-20 MHz c 10-100 kHz 12 What type of transducer is commonly used in continuous ultrasound imaging? a Magnetic transducer b Optical transducer c Piezoelectric transducer 13 What is the main advantage of continuous ultrasound over pulsed ultrasound? a Lower cost b Continuous imaging of moving structures c Higher resolution 14 What is the typical duty cycle of continuous ultrasound? a 100% b 10% c 50% 15 What is the main limitation of continuous ultrasound imaging? a Limited contrast b Limited penetration depth c Limited lateral resolution 16 What is the main application of continuous ultrasound in medical imaging? a Doppler imaging b Real-time imaging c 3D reconstruction 17 What is the effect of increasing the frequency in continuous ultrasound imaging? a Reduced frame rate b Improved resolution c Increased penetration depth 18 What is the primary source of image formation in continuous ultrasound? a Refraction of sound waves b Reflection of sound waves c Absorption of sound waves 19 What is the typical frame rate of continuous ultrasound imaging? a 60 frames per second b 30 frames per second c 5 frames per second 20 What is the main disadvantage of continuous ultrasound compared to pulsed ultrasound? a Lower contrast resolution b Higher cost c Limited depth resolution 21 What is the Fraunhofer zone also known as in ultrasound? a Middle field b Near field c Far field 22 In which zone does the ultrasound beam diverge? a Fresnel zone b Near field c Fraunhofer zone 23 What happens to the beam width in the Fraunhofer zone? a Decreases b Remains constant c Increases 24 Which zone is closer to the transducer: Fresnel or Fraunhofer? a They are equidistant b Fraunhofer c Fresnel 25 What is the primary factor affecting beam divergence in the Fraunhofer zone? a Wavelength b Amplitude c Frequency 26 Where does the Fraunhofer zone start in relation to the transducer? a Beyond the near field b At the transducer surface c In the middle field 27 Which zone is characterized by minimal beam divergence? a Fraunhofer zone b Fresnel zone c Near field 28 What is the effect of increasing frequency on the Fraunhofer zone? a Remains the same b Shortens c Lengthens 29 At what distance does the Fraunhofer zone typically start in ultrasound imaging? a Directly at the transducer b A single wavelength away c Several wavelengths away 30 Which zone is crucial for maintaining beam focus in ultrasound? a Fraunhofer zone b Near field c Fresnel zone 31 What determines the ultrasound frequency in pulsed ultrasound? a The time between pulses b The amplitude of the ultrasound wave c The medium through which the ultrasound travels 32 In continuous ultrasound, what determines the ultrasound frequency? a The distance the ultrasound travels b The duration of the ultrasound pulse c The source generating the ultrasound 33 How is ultrasound frequency measured in pulsed ultrasound? a In decibels (dB) b In cycles per second (Hertz) c In meters per second (m/s) 34 What is the typical frequency range for medical ultrasound imaging? a 100 to 500 kilohertz (kHz) b 2 to 18 megahertz (MHz) c 20 to 50 gigahertz (GHz) 35 What happens to the ultrasound frequency in continuous ultrasound? a It increases with distance b It decreases over time c It remains constant 36 How does the ultrasound frequency affect image resolution in pulsed ultrasound? a Higher frequency decreases resolution b Frequency has no impact on resolution c Higher frequency improves resolution 37 What is the relationship between wavelength and frequency in ultrasound? a Direct relationship b Inverse relationship c No relationship 38 What is the unit of measurement for ultrasound frequency? a Hertz (Hz) b Pascal (Pa) c Watt (W) 39 How does the medium affect ultrasound frequency in continuous ultrasound? a It has no effect on the frequency b It significantly changes the frequency c It can slightly alter the frequency 40 What is the primary factor influencing ultrasound frequency in pulsed ultrasound? a The transducer used b The temperature of the medium c The power of the ultrasound beam 41 Which pulsed parameter affects the resolution of an imaging system? a Pulse duration b Pulse repetition frequency c Pulse amplitude 42 How does increasing pulse duration impact resolution? a Decreases resolution b Improves resolution c No impact on resolution 43 What is the relationship between pulse width and resolution? a Inverse relationship b No relationship c Direct relationship 44 Which pulsed parameter is crucial for distinguishing closely spaced objects? a Pulse amplitude b Pulse width c Pulse repetition frequency 45 How does increasing pulse repetition frequency affect resolution? a Decreases resolution b No impact on resolution c Improves resolution 46 What happens to resolution when pulse amplitude is increased? a Resolution improves b No impact on resolution c Resolution decreases 47 Which pulsed parameter is related to the sharpness of image features? a Pulse fall time b Pulse rise time c Pulse repetition frequency 48 How does decreasing pulse rise time affect resolution? a No impact on resolution b Decreases resolution c Improves resolution 49 What is the effect of increasing pulse fall time on resolution? a Decreases resolution b No impact on resolution c Improves resolution 50 Which pulsed parameter is crucial for reducing motion blur in imaging? a Pulse duration b Pulse amplitude c Pulse repetition frequency
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