Can wavelength be adjusted in sonography?

In sonography, wavelength is inherently related to both the frequency of the ultrasound wave and the speed of sound in the medium. The speed of sound in soft tissue is considered relatively constant at approximately 1540 meters per second. Therefore, by altering the frequency of the ultrasound wave, one can effectively change the wavelength, since wavelength is calculated as the speed of sound divided by the frequency.

When considering the options, the statement that wavelength cannot be changed would imply that the characteristics of the ultrasound beam are fixed, which is not accurate in practical applications. By adjusting the transducer frequency or utilizing different transducers designed for specific frequency ranges, sonographers can indeed manipulate the wavelength to optimize image resolution and depth of penetration based on clinical needs.

In addition, while specific conditions or different equipment could lead to variations in effective operating wavelengths, the fundamental understanding that wavelength can be adjusted through frequency changes remains core to ultrasound physics. Thus, the premise that wavelength is unchangeable in sonography is incorrect. Wavelength can be influenced by adjustments in frequency and the selection of appropriate equipment for varying clinical scenarios.