What is the typical frequency range for most ultrasound machines?

The correct answer is related to the typical frequency range used in medical ultrasound machines, which is between 2 to 15 MHz. This frequency range is optimal for various types of imaging, allowing for a good balance between depth of penetration and image resolution.

Lower frequency ultrasound (around 2 to 5 MHz) is often used for deeper structures, such as those found in the abdomen, as it can penetrate tissues more effectively. Higher frequencies (up to 15 MHz) produce better resolution images for more superficial structures, such as those found in vascular studies or musculoskeletal applications. This versatility makes the 2 to 15 MHz range a standard in many clinical settings.

The other options fall outside this typical range. Frequencies below 2 MHz generally provide poor image resolution for most clinical applications, while frequencies above 15 MHz may not be suitable for deeper structures due to their limited penetration capabilities. Thus, the selected frequency range encompasses the diverse imaging needs commonly encountered in practice, providing clear insights into both superficial and deep anatomical structures.