URR SPI Exam 1, Questions and Answers Scored A+

URR SPI Exam 1, Questions and Answers Scored A+ The Doppler shift is 5000Hz. The pulse repetition frequency is 9000Hz. Which of the following is true? A: The peak velocity is equal to 2 m/s B: Aliasing will occur C: Range ambiguity will occur D: The peak pressure gradient is 36 mmHg B: Aliasing will occur The acoustic impedance of the matching layer: A: must be much thinner than the transducer element B: usually the same material as the damping layer C: is usually very low D: is usually much higher than the acoustic gel applied to the patient C: is usually very low When working in a hospital setting, what is the best way to verify a patient's identity? A: Ask the patient to verify their date of birth B: Check the hospital issued ID bracelet C: Ask the patient to verify their name and room # D: Ask the patient to verify their medical record number B: Check the hospital issued ID bracelet When Harmonic imaging is turned on, it primarily improves ________________ resolution. A: Temporal B: Lateral C: Contrast D: Axial B: Lateral What type of precautions is required for a patient with MRSA? A: droplet precautions B: enteric precautions C: protective environment precautions D: contact precautions D: contact precautions Decreasing the number of cycles in a pulse will: A: increase the wavelength B: increase the frequency of the wave C: improve the axial resolution of the system D: degrade the axial resolution of the system C: improve the axial resolution of the system Which of the following parameters will change when the Sonographer decreases the imaging depth? A: decreased frame rate B: improved elevational resolution C: decreased PRF D: increased PRF D: increased PRF Which of the following system adjustments would increase the size of the spectral window? A: changing from a 4mm to 2mm sample size B: tortuous vessel C: changing from a 2mm to 4mm sample size D: decreasing rejection A: changing from a 4mm to 2mm sample size When working in a hospital setting, what is the best way to verify a patient's identity? A: Ask the patient to verify their medical record number B: Ask the patient to verify their date of birth C: Ask the patient to verify their name and room # D: Check the hospital issued ID bracelet D: Check the hospital issued ID bracelet 10. Which of the following describes the effect on the frame rate when changing from duplex to triplex imaging? A: decreased B: no change to the frame rate when color Doppler is active C: no change to frame rate when PW Doppler is active D: increased A: decreased Which of the following is a limitation of Analog Doppler? A: unable to detect post stenotic turbulence and spectral broadening B: cannot detect flow velocities over 300cm/s C: cannot detect flow velocities less than 60cm/s D: overestimates high velocities and underestimates low velocities A: unable to detect post stenotic turbulence and spectral broadening In order to obtain an accurate blood flow velocity calculation, the _______________ must be known. A: pulse repetition frequency B: angle between the vessel wall and the sound beam C: wall filter setting D: angle between the flow and the sound beam D: angle between the flow and the sound beam Increasing the frequency improves ______________, _______________, and _______________. A: Depth of penetration, beam width, axial resolution B: Lateral resolution, intensity, beam width C: Axial resolution, lateral resolution, beam width D: Frequency, intensity, beam depth C: Axial resolution, lateral resolution, beam width How do you adjust your technique to reduce or eliminate cross talk on a Doppler tracing? A: Increase the PRF B: Use the same approach and incident angle but use a CW non-imaging probe C: Use a smaller sample size D: Turn down the Doppler gain D: Turn down the Doppler gain The Centers for Disease Control recommend single-use sterile ultrasound gel for ultrasound exams performed during which of the following: A: venous insufficiency exams B: placement of central venous line C: 2nd and 3rd trimester OB anatomy exams D: scrotal exams B: placement of central venous line Which of the following will reduce color flash artifact? A: decrease color priority B: decrease color filter C: decrease color scale D: increase color gain A: decrease color priority What is the cause of the vertical acoustic shadow seen on both images? A: element damage B: electrical interference C: air in the trachea D: patient motion A: element damage Which statement correctly describes reflection? A: The greater the difference in acoustic impedance of the two media, the greater the amount of reflection at their interface. B: The greater the difference in propagation speed of the two media, the greater the amount of reflection at their interface. C: The greater the difference in attenuation rate of the two media, the greater the amount of reflection at their interface. D: The greater the difference in the distance the sound travels in each media, the greater the amount of reflection at their interface. A: The greater the difference in acoustic impedance of the two media, the greater the amount of reflection at their interface. _______________ used to form the sector shaped field of view for a phased array transducer. A: The curved arrangement of the elements are B: An acoustic lens is C: Electronic focusing is D: Electronic steering is D: Electronic steering is If beam intensity decreases from 10mW/cm2 to a level of 2.5 mW/cm2, the output power was adjusted by _________________. A: -6dB B: +3dB C: +6dB D: -3dB A: -6dB If a 7 MHz wave is transmitted through the media listed below, the shortest wavelength will be seen in the wave moving through ______________. A: soft tissue B: fat C: air D: bone C: air If a patient experiences significant orthopnea, how will this change how you perform an ultrasound exam? A: The patient will need to be scanned in the standing position. B: The patient will need to be scanned in the semi-erect position. C: The patient will need to be scanned in the prone position. D: The patient will need to be scanned in the supine position. B: The patient will need to be scanned in the semi-erect position. For an US system to produce a real time flicker free image the minimum frame rate required is ________________. A: 10Hz B: 15Hz C: 30Hz D: 60Hz B: 15Hz Which of the following is the best way to reduce the artifactual echoes on the image indicated by the red arrows? A: reduce TGC settings in the near field B: decrease power output setting by 25% C: decrease rejection D: reduce TGC settings in the far field A: reduce TGC settings in the near field Increasing the number of pulses in a color packet will: A: increase color priority B: decrease color sensitivity C: increase frame time D: increase frame rate C: increase frame time