ARDMS Sonography Principles and Instrumentation (SPI) Practice Exam

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What does B-mode in sonography indicate with its brightness levels?

Depth of the reflector

Strength of the reflection

B-mode, or brightness mode, in sonography refers to the way that the strength of the reflected ultrasound waves is visually represented on the display. In B-mode imaging, the intensity or brightness of each pixel corresponds directly to the amplitude of the returning echoes from the tissues being imaged. Stronger echoes from denser structures will appear brighter on the screen, while weaker echoes will appear darker.

This principle allows clinicians to differentiate between various tissues based on their acoustic properties. For instance, fluid-filled structures will typically yield weaker reflections than solid or denser tissues and will, therefore, appear with a different level of brightness. Consequently, understanding B-mode and its indication of reflection strength is crucial for interpreting ultrasound images effectively.

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Speed of the wave

Velocity of blood flow

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