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Red physics edlemen book ardms_spi with 100% correct answers | verified | latest update 2024
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Red physics edlemen book ardms/spi- ✅✅ -True or false two waves with identical frequencies must interfere
constructively
-10dB - ✅✅ -An ultrasound system is set at 0dB and is transmitting at full
intensity. What is the output power when the system is transmitting at 10% of full
intensity?
-3 dB - ✅✅ -an ultrasound system is set At 0dB and is transmitting at full
intensity. What is the output power when the system is transmitting at 50% of full
intensity?
-milli - ✅✅-10-3
(True or false) gray scale can be changed by the sonographer. - ✅✅-True or
false) gray scale can be changed by the sonographer.
✅✅
(True/false) Doppler shifts are always created when the source and receiver are
in motion relative to each other. - -False
0.0% - ✅✅-What is the maximum value of the duty factor ?
0.06cm - ✅✅-Which of the following is the best lateral resolution?
0.1 - ✅✅-According to the aium statement on bio effects, there statements on
bio effects, there have been no confirmed bio effects below intensities of_______
watts per square centimeter SPTA.
0.3MHz - ✅✅-3000,000 cycles occurs in a second, what is the waves
frequency?
0.5cm -✅✅-If the spatial pulse length is 10mm,what is the axial resolution ?
0.5dB/cm - ✅✅-What is the approximate attenuation coefficient of 1 MHz US in
soft tissue ?
,0.6dB/cm/MHz - ✅✅-Attenuation of US is soft tissue is closest to ?
1-10MHz - ✅✅-What are typical clinical Doppler frequencies?
1,500 m/s - ✅✅-The speed of US in soft tissues is closest to ?
1.0 - ✅✅-The duty factor for continuous wave ultrasound is ?
1.54 m/s - ✅✅-The propagation speed of US in the AIUM test objects is ?
1% - ✅✅-The most likely amount of reflection at a boundary between soft
tissue is ?
10 -✅✅-How many bits are needed to represents 1024 gray shades ?
10 cm - ✅✅-A pulse is emitted by a transducer and is traveling in soft tissue.
The go return time, or time of flight,of a sound pulse is 130 microseconds. What
is the reflector depth ?
✅✅--micro
10^-6 -
100 mW/cm2 - ✅✅-Biological effects have not been documented below what
intensity (SPTA)?
14 kHz - ✅✅ -A Doppler exam is performed with a 5kHz probe and PRF of 15
kHz.which of these Doppler shifts will create aliasing ?
✅✅-The frequency closest to the lower limit of US is?
15,000 Hz -
1kHz - ✅✅-What is the frequency of a wave with 1 msec period?
2-10MHz - ✅✅-What is the range of frequencies created by medical
diagnostics Doppler transducer ?
2kHz - ✅✅-What is the most typical Doppler shift measured clinically?
, 2times - ✅✅ -The distance to a target is doubled. The time-of-flight for a pulse
to travel to the target and back is ?
✅✅-Which of the following Is not preprocessing?
3-D rendering -
30 KHz - ✅✅-Which of following sound waves is ultrasonic and least useful in
diagnostic imaging?
3cm - ✅✅ -An object is located at a depth of 10 cm. The imaging depth is 7cm.
At what depth will a reflection from the object appear on the image ?
4-✅✅-How many bits are needed to represents 16 shades of grey?
45mm - ✅✅-Depth calibration of a machine measures 100mm spaced wires to
be 90mm apart.scanning reflectors 50mm apart. Scanning reflectors 50mm
apart,what will the machine calculate the distance to be ?
5MHz - ✅✅ -The fundamental frequency of a transducer is 2.5MHz. What is the
second harmonic frequency?
6- ✅✅-How many cm are 60 millimeters?
6 - ✅✅-How many data bits are needed to represent 46 gray shades?
60-75 degrees - ✅✅-What Doppler angle is most inaccurate?
6dB - ✅✅-Sound intensity is decreased your 75%. How many decibels of
attenuation is this?
8dB - ✅✅ -An US wave travels through two media and has attenuation of 3dB
in the first and 5dB in the second. What is the total attenuation ?
90 degrees - ✅✅-For Doppler,which incident angle results in no shifts ?
99% - ✅✅-The most typical amount of transmission at a boundary in biologic
media is ?
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