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SPI Exam Review|Ultrasound Physics|QUESTIONS| COMPLETE SOLUTIONS|Ultrasound Physics Review|SPI Review\ALL Chapters, Formulas & Relationships|UPDATED 2022|Ultrasound SPI Physics Review|

Length Correct Answer: mm, cm, inches, feet distance, circumference *length of a circles border" Area Correct Answer: cm squared, ft squared cm2, ft2 Volume Correct Answer: cm cubed, ft cubed... cm3, ft3 Multipy by that number Correct Answer: increase by a factor of___ means Divide by that number Correct Answer: decrease by a factor of ____means Rule of Scientific Notation Correct Answer: 1) shift decimal point so result number is between one and ten 2) multiply by the appropriate Power of 10 1,000,000 = 1.0 x 10(6) 0.000000124 = 1.24 x 10 (-3) 1742 = 1.742 x 10(3)Meaning of Anechoic? Correct Answer: Dark, less echos. Meaning of Echogenic? Correct Answer: Full of echoes. Meaning of Hyperechoic? Correct Answer: More echoes than adjacent tissue. Meaning of Hypoechoic? Correct Answer: Less Echoes than adjacent tissue. Meaning of Isoechoic? Correct Answer: Similar/same echoes than adjacent tissue. Meaning of Homogenous? Correct Answer: Uniform Texture. (smooth)The fundamental or operating frequency Correct Answer: is affected by the thickness of the PZT element (thickness = ½ wavelength) Which of the following could not be used as the coupling medium (gel)? Correct Answer: barium sulfate The piezo electric effect is best described as Correct Answer: deformation from voltage sent to the crystals How thick is the element if the frequency is 3MHz? Correct Answer: half the wavelength of the wave in the PZT The gel has greater impedance that the matching layer but less than the impedance of the PZT elements' T/F Correct Answer: False The impedance of the PZT crystals is higher than the impedance of skin tissue. T/F Correct Answer: TrueWhile using a linear sequential array transducer during a color Doppler exam, the shape of the grayscale image is most often _______, Whereas the shape of the color Doppler portion of the image is _______. A. rectangular, parallelogram B. rectangular, sector C. sector, trapezoid D. square, rectangular Correct Answer: A. rectangular, parallelogram The shape of a grayscale image using a linear sequential array is rectangular. However, the sound beams used for Doppler are steered at an angle, creating a parallelogram shaped region. [Show More]

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