Sonosim-Fundamentals of Ultrasound
Which of the following choices regarding posterior acoustic enhancement? - ANSWER- It causes the far field of a fluid-filled structure to appear hyperechoic
The physics of ultrasound transmission and the properties of various tissues enable some tissues to serve as acoustic windows - ANSWER-true
Transducers have a ranch of frequencies in which they can operate - ANSWER-true
the term "2D", "B Mode", "greyscale ultrasound" mean the same thing - ANSWER-true
A linear sequential-array transducer ______ - ANSWER--can operate within a range of frequencies -sacrifices tissue penetration for better resolution -has a higher operational frequency relative to a curvilinear transducer
A structure that is darker than its surrounding tissue is described as hypoechoic - ANSWER-true
Which of the following best characterizes the mirror-image artifact encountered when scanning through the liver-diaphragm interface? - ANSWER-Mirror-image artifact is found below, or posterior to, the diaphragm
When imaging the patient in a sagittal plane, the patient's feet are oriented towards the left side of the screen. - ANSWER-false
Adjusting the gain of an image will adjust the overall brightness of the screen - ANSWER-true
Which of the following statements regarding attenuation is incorrect? - ANSWER-none of the above
Edge artifact is the result of sound refreaction - ANSWER-true
The transducer indicator ____ - ANSWER-should generally be oriented towards the patient's head when imaging in the sagittal plane
Which of the following statements about piezoelectric crystals is incorrect? - ANSWER- none of the above
When imaging with M-mode, motion is indicated in the graphical representation by the color red. - ANSWER-false
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