In ultrasound imaging, which term is used for tissues that appear darker than surrounding tissue due to lower reflectivity?

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Multiple Choice

In ultrasound imaging, which term is used for tissues that appear darker than surrounding tissue due to lower reflectivity?

Explanation:
In ultrasound imaging, brightness reflects how strong the echoes are from tissue. Tissues that return fewer echoes appear darker than their surroundings because of lower reflectivity. This darker appearance is described as hypoechoic. For comparison, anechoic means no echoes at all and looks completely black (fluid-filled spaces), isoechoic means it has the same brightness as surrounding tissue, and hyperechoic means it is brighter than surrounding tissue due to higher reflectivity. Thus, the darker-than-surrounding description corresponds to hypoechoic.

In ultrasound imaging, brightness reflects how strong the echoes are from tissue. Tissues that return fewer echoes appear darker than their surroundings because of lower reflectivity. This darker appearance is described as hypoechoic. For comparison, anechoic means no echoes at all and looks completely black (fluid-filled spaces), isoechoic means it has the same brightness as surrounding tissue, and hyperechoic means it is brighter than surrounding tissue due to higher reflectivity. Thus, the darker-than-surrounding description corresponds to hypoechoic.

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