Edelman Understanding Ultrasound Physics Exam Review | Questions and Correct Answers | Latest Update 2026/2027 | Graded A+ | 100% Pass.

Edelman Understanding Ultrasound Physics Exam Review | Questions and Correct Answers | Latest Update 2026/2027 | Graded A+ | 100% Pass. As a pulse passes through soft tissue, a certain amount of acoustic energy remains in the tissue as heat. What is this constituent of attenuation called? a. Scattering b. Absorption c. Refraction d. Rarefaction Absorption What is the amount of attenuation per centimeter that a sound wave undergoes called? a. Beam uniformity coefficient b. Attenuation coefficient c. Attenuation d. Duty factor Attenuation coefficient A sound beam travels 9 cm in soft tissue. The attenuation coefficient is 3 dB/cm. What is the total attenuation that the sound beam experienced? a. 9 dB b. 3 dB c. 27 dB d. 18 dB 27 dB Sound traveling through blood attenuates to a ____ extent than when traveling through soft tissue. a. Greater b. Lesser c. Relatively equal Lesser Which of these lists indicates media with increasing attenuation of ultrasound? a. Water, lung, soft tissue, bone, air b. Lung, wair, soft tissue, bone c. Lung, fat, muscle d. Water, blood, fat, muscle, bone, air Water, blood, fat, muscle, bone, air True or false? Attenuation and propagation speed are unrelated. True Acoustic impedance is a property of ______ and has units of ___________. a. Source and medium, lumps b. Medium, dB c. Medium, Rayls d. Medium, Ohms Medium, Rayls To calculate the acoustic impedance of a medium, one should ________ the __________ by the __________. a. Divide, propagation speed, density b. Multiple, density, propagation speed c. Divide, density, propagation speed d. Multiply, stiffness, density Multiply, density, propagation speed Which two attributes help establish the acoustic impedance of a medium? a. Density and temperature b. Density and stiffness c. Stiffness and elastance d. Elasticity and compressibility Density and stiffness The attenuation of an acoustic wave traveling through bone is _______ its attenuation through soft tissue. a. Greater than b. Less than c. Equal to Greater than Ultrasound waves traveling through lung tissue attenuate to a ________ extent than when traveling through soft tissue. a. Greater b. Lesser c. Nearly equal Greater Which value is closest to the impedance of soft tissue? a. 1.5 kiloRayls b. 2.5 deciRayls c. 19 megaRayls d. 2,000,000 Rayls 2,000,000 Rayls Which of the following describes an angle with a measure of 45 degrees? a. Orthogonal b. Acute c. Obtuse d. Normal Acute Which of the following describes an angle with a measure of 123 degrees? a. Orthogonal b. Acute c. Obtuse d. Normal Obtuse The angle between the direction of propagation and the boundary between two media is 90 degrees. What term describes the form of incidence of the wave? a. Not normal b. Direct c. Oblique d. Orthogonal Orthogonal Which term below does not belong in the group below? a. Orthogonal b. At right angles c. Oblique d. 90 degrees e. Normal f. Perpendicular Oblique