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intro to sonography
quiz 1 (assignment 3)
| Term | Definition |
|---|---|
| Which of the following advanced medical ultrasound technologies has a wide range of elements with different frequencies? A) subharmonic imaging B) ultrasound tomography C) CMUT D) ABUS | C) |
| Which type of future application for medical sonography will analyze images using algorithms? | AI |
| T/F: liver tissue and heart muscle have the same attenuation coefficient | F |
| Which of the following is not a sound attenuation process? A) refraction B) 90° beam reflection C) scattering D) beam divergence | B) |
| Which of the listed parameters has to exist in order to have refraction of sound energy? A)both b and c B) oblique incidence C) different velocities D) different densities | A) |
| Quantitative elastography can be done using__________ induced methods | Mechanically or ultrasoudnd |
| Strain imaging is a type of ____________ that uses mechanical probe/transducer pressure | Elastography |
| Which of the following is NOT an application for elastography? A) liver B) thyroid C) kidney D)pregnancy E) prostate | D) |
| CEUS utilizes _________ that vibrate at a strong second harmonic frequency which is detected by the ultrasound unit | Bubbles |
| What is the most common use of CEUS in the US? | Cardiac sonography |
| FAST & E - FAST are types of ultrasound scans that are typically done in ________ settings | POCUS |
| Sophisticated detection and imaging techniques based on the Doppler effect and on tracking motion in tissue images are known as_________ Doppler | Tissue |
| Lung/chest sonography has seen__________ in usage during the COVID-19 epidemic | An increase |
| Absorption is defined as | conversion of mechanical energy to heat |
| At 90° incident sound angle and a soft tissue muscle specular interface, which parameter would result in the greatest degree of sound reaching the next specular interface? | Transmission |
| If the intensity reflection coefficient is 0.03 what is the percentage of sound transmitted into the second medium? | 97% |
| If the impedances are equal between two media in perpendicular incidence, there is no ________. | Reflection |
| If the propagation velocity of medium one is equal to the propagation velocity of medium two, the transmitted sound beam angle at the interface will | equal the incident beam angle |
| Refraction requires what factors? | 1. Angled incidence 2. Velocity differences between the adjacent mediums |
| Which parameter affects the degree of the fraction in soft tissue? | Velocity differences |
| Suppose that the propagation velocity of medium two is 1300 m/s in the propagation velocity of medium one is 1200 m/s. For an incident angle is 30°, is there refracted angle toward or away from normal? | Away from |
| The intensity transmission coefficient as a result of | Acoustic impedance differences |
| What can we say about the transmitted sound beam for two adjacent media (specular interface) that have the same sound velocities? | The transmitted angle is the same as the incident angle |
| In the soft tissue, what is the attenuation of A 7.5 MHz ultrasound beam at a depth of 12 cm? | 45 dB attenuation |
| What is the average attenuation coefficient that we use in this class? | 0.5 dB/ cm |
Created by:
camillerome