Adult Echocardiography Practice Exam

Question: 1 / 400

What is the sound frequency range typically used in transthoracic echocardiography?

0.5 to 1 MHz.

1 to 5 MHz.

In transthoracic echocardiography, the typical sound frequency range used is between 1 to 5 MHz. This frequency range strikes a balance between adequate tissue penetration and resolution of the cardiac structures. Lower frequencies, such as those below 1 MHz, can penetrate deeper tissues but may lose resolution, making it challenging to visualize finer structures of the heart. Conversely, higher frequencies, like those in the range of 10 to 15 MHz, provide excellent resolution but are limited in penetration, which may not be sufficient for comprehensive imaging in a transthoracic approach.

The selection of 1 to 5 MHz frequencies allows for optimal imaging of the heart while providing clear images necessary for accurate diagnostics in various conditions. This range is effective for visualizing both the left and right heart structures, as well as valves and major vessels, contributing to the accurate assessment of cardiac function and pathology.

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5 to 10 MHz.

10 to 15 MHz.

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