Sonographic terms, Doppler uses, FAST exam, common radiotracers and scans such as V/Q and bone scan, PET basics and BI-RADS categories.
44 cards · basic cards · AI-written, checked twice. Edit anything.
- What does 'echogenic' mean in ultrasound imaging?
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Producing more reflected sound waves, appearing brighter on the image- What does 'anechoic' mean in ultrasound imaging?
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Producing no internal echoes, appearing completely black (e.g. simple fluid)- What is 'posterior acoustic enhancement' a sign of?
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A fluid-filled structure (brightness increases behind it)- What causes posterior acoustic shadowing on ultrasound?
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A highly attenuating structure such as a stone or calcification blocking sound transmission- What is the 'twinkle artifact' used to detect?
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Small calculi or calcifications, seen as a color signal behind them on color Doppler- What causes a 'reverberation' artifact on ultrasound?
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Sound bouncing repeatedly between two strong reflectors, creating equally spaced parallel lines- What is 'comet tail' artifact associated with?
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Small, closely spaced reverberations from a highly reflective small structure, like gallbladder adenomyomatosis- What is the mirror image artifact on ultrasound caused by?
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A strong reflector (such as the diaphragm) causing a duplicate structure to appear on the far side of it- What does pulsed-wave Doppler measure?
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Blood flow velocity and direction at a specific, selected location- What is color Doppler used to display?
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The direction and relative speed of blood flow overlaid in color on a grayscale image- In standard color Doppler convention, what does flow toward the transducer appear as?
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Red- What does power Doppler detect?
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The presence and amount of blood flow, with greater sensitivity but no directional information- What is the resistive index (RI) used to assess in Doppler ultrasound?
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Downstream vascular resistance, calculated from peak systolic and end-diastolic velocities- An elevated resistive index in a transplanted kidney suggests what?
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Transplant dysfunction or rejection- What Doppler finding is classic for testicular torsion?
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Absent or markedly decreased blood flow to the affected testicle
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