Ultrasound physics Study guides, Class notes & Summaries

physics - Branch of science that involves the study of the physical world: energy, matter and how they are related. mechanics - branch of physics that studies motion and forces thermodynamics - the study of the energy's system of particles Electromagnetism - the study of electricity, magnetism, and the relationship between them optics - the study of the generation, transmission, and detection of visible, infrared, ultraviolet, and microwave radiation nuclear physics - the study of the n...

Meaning of Anechoic? - Dark, less echos. Meaning of Echogenic? - Full of echoes. Meaning of Hyperechoic? - More echoes than adjacent tissue. Meaning of Hypoechoic? - Less Echoes than adjacent tissue. Meaning of Isoechoic? - Similar/same echoes than adjacent tissue. Meaning of Homogenous? - Uniform Texture. (smooth) Meaning of Heterogenous? - Different levels of echogenicity. Definition of Wavelength? - The length of one cycle. -Denoted by (Lamda) Unit for Wavelength? - m, cm, mm Defini...

1. The four properties of photons are _____, _____, _____ and _____. a. size, shape, spin, mass b. frequency, mass, amplitude, wavelength c. frequency, wavelength, velocity, amplitude d. refraction, velocity, spin, amplitude ANS: C The properties of photons are frequency, wavelength, velocity, and amplitude. DIF: Moderate REF: page 45 OBJ: Identify the properties of photons. 2. The smallest quantity of any type of electromagnetic radiation is a(n) _____. a. photon b. electron c. neutr...

Which of the following transducers will have the worst axial resolution? a. Vector array, 3 MHz b. Linear Sequential Array, 6 MHZ c. Linear Phased Array 7.5 MHZ d. Annular Array, 6 MHz A sound wave is traveling in the body and propagates from muscle to air. What percentage of the sound wave is most likely reflected at the muscle-air boundary? a. 0.5% b. 75% c. 25% d. 5% e. 99%

1. (a) Describe how you would measure the thermal conductivity of a liquid, which is a poor conductor of heat, pointing out the precautions you would take to ensure an accurate result. (b) Explain (i) the observed difference between the temperatures of the seawater and the air during the night-time in the autumn in Hong Kong, and (ii) the survival of fish in frozen-over ponds during the winter in North China. 2. Give accounts of the physics of the working of (a) a Geiger-Muller tube, a...

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