在相同的空間解析度下，高頻超音波比低頻的取樣體積內的散射子較少，其散射

在相同的空間解析度下，高頻超音波比低頻的取樣體積內的散射子較少，其散射強度相較於低頻也因此而較弱，所以高頻超音波影像較無法獲得高的訊雜比（signal-to-noise ratio, SNR）。

結果 (英文) 1:

At the same spatial resolution, high-frequency ultrasound than scatters in the sample volume is less low frequency, compared to low scattering intensity is weak and therefore, the high-frequency ultrasound image can not be obtained higher than the SNR (Signal- to-noise ratio, SNR).

結果 (英文) 2:

At the same spatial resolution, the high-frequency supertone wave has fewer scattering subs than the low frequency sampling volume, and its scattering intensity is weaker than the low frequency, so high-frequency ultrasound images can not obtain a high signal-to-noise ratio (signal-to-noise ratio, SNR).

結果 (英文) 3:

In the same spatial resolution, there are fewer scatterers in the sample volume of high-frequency ultrasonic wave than low-frequency ultrasonic wave, and the scattering intensity is weaker than low-frequency ultrasonic wave, so high-frequency ultrasonic image can not get high signal to noise ratio (SNR).