Axial resolution is proportional to which parameter?

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Multiple Choice

Axial resolution is proportional to which parameter?

Explanation:
Axial resolution depends on how long the transmitted pulse lasts in tissue, which is the distance the wave travels during the pulse. That distance—often called the spatial pulse length—equals the number of cycles in the pulse times the wavelength. Since the axial resolution is essentially half of that spatial pulse length, it scales directly with wavelength. In other words, longer wavelengths give a longer pulse and worse axial resolution, while shorter wavelengths (higher frequency) shorten the pulse and improve axial resolution. This linear (proportional) relationship to the wavelength is what makes the answer Proportional the best fit.

Axial resolution depends on how long the transmitted pulse lasts in tissue, which is the distance the wave travels during the pulse. That distance—often called the spatial pulse length—equals the number of cycles in the pulse times the wavelength. Since the axial resolution is essentially half of that spatial pulse length, it scales directly with wavelength. In other words, longer wavelengths give a longer pulse and worse axial resolution, while shorter wavelengths (higher frequency) shorten the pulse and improve axial resolution. This linear (proportional) relationship to the wavelength is what makes the answer Proportional the best fit.

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