Medical ultrasound. Ultrasound with f = 4.7 MHz is used in a medical imager. Find the wavelength in air, with sound speed 343 m/s. Find the wavelength in muscle tissue, with v = 1580 m/s.
Medical ultrasound. Ultrasound with f = 4.7 MHz is used in a medical imager. Find the...
Diagnostic ultrasound of frequency 3.48 MHz is used to examine tumors in soft tissue. (a) What is the wavelength in air of such a sound wave? (b) If the speed of sound in tissue is 1380 m/s, what is the wavelength of this wave in tissue? (Take the speed of sound in air to be 343 m/s.)
5) An ultrasound wave with an intensity of 46,500 watts per square meter and a frequency of 55.0 kHz is used to shatter a kidney stone. Find the sound intensity level and the wavelength for this ultrasound wave if the wave is traveling in air at room temperature (speed of sound is 343 m/s).
Ultrasound probes can resolve structural details with sizes approximately equal to the wavelength of the ultrasound waves themselves. What is the size of the smallest feature observable in human tissue when examined with 12-MHz ultrasound? The speed of sound in human tissue is 1,540 m/s. I x m Enter a number. Nu niet? Rand it
Review I Constants Part A An echocardiogram uses 4.4 MHz ultrasound to measure blood flow in the aorta. The blood is moving away from the probe at 1.7 m/s What is the frequency shift of the reflected ultrasound? Use values given in the table if necessary. Enter a positive value if the received frequency is higher than the emitted frequency, and a negative value if the received frequency is lower than the emitted frequency. Express your answer to two significant...
An ultrasound unit is being used to measure a patient's heartbeat by combining the emitted 2.0 MHz signal with the sound waves reflected from the moving tissue of one point on the heart. The beat frequency between the two signals has a maximum value of 470 Hz . What is the maximum speed of the heart tissue? The speed of ultrasound waves in human tissue is 1540 m/s.
A doppler blood flow meter emits ultrasound at a frequency of 5.0 MHz. The speed of sound in human tissue is 1540 m/s. The blood is moving at 0.15 m/s. A. What is the frequency shift do to the motion of the blood (Ch. 15)? B. What is the frequency of the waves reflected off the blood? C. What is the beat frequency of the interference between the emitted and reflected waves?
Color Doppler ultrasound devices are often used to assess the health of the fetal heart during pregnancy. During a fetal ultrasound exam, a transducer placed against the expectant mother's abdomen transmits ultrasound waves with a frequency of 3.500 MHz and receives the Doppler shifted echo from the fetal heart. (a) If the echo received from the fetal heart by the transducer has a frequency of 3.498 MHz and 3.503 MHz from the left and right ventricles, respectively, what is the...
Ultrasound is sent through a tissue with a density of 0.9 *103 kg/m3 and an elastic modulus of 2.6 GPa. What is the speed at which the wave travels? 2) Assuming the frequency of the ultrasound is 7 MHz. What is the wavelength of the sound wave from the previous problem as it travels through the tissue?
A doppler fetal monitor is a hand-held ultrasound device that is used to detect a fetal heartbeat in prenatal care. The device works by measuring the speed of the fetus's ventricular wall and thereby tracking its heartrate. a. Suppose the fetus's ventricular wall moves back and forth in a pattern approximating simple harmonic motion with an amplitude of 1.7 mm and a frequency of 3.0 Hz. Find the maximum speed of the heart wall (in m/s) during this motion. Be...
An ultrasonic transducer of the type used in medical ultrasound imaging, is a very thin disk (m = 0.10 g) driven back and forth in SHM at 1.2 MHz by an electromagnetic coil. (a) The maximum restoring force that can be applied to the disk without breaking it is 36,000 N. What is the maximum oscillation amplitude that won't rupture the disk? (b) What is the disk's maximum speed at this amplitude? X m/s