Spectrum imaging is designed for imaging by using the entire frequency territory supported by the probe, no matter how the TX frequency is designated. The frequency range can be broadened for better penetration and resolution. When creating a 2D ultrasound image, the signal returned by the TX frequency drive of wideband frequency divided into each sub-band is generally not consistent. Thus, if the image is composed in this form, speckle is reduced and the overall contrast resolution improves with improved SNR (Signal-to-Noise Ratio).
Full Spectrum Imaging is also applicable in harmonic imaging. In general, harmonic imaging has a higher frequency than fundamental imaging, in that an image with better resolution may be obtained. However, a higher frequency results in a loss in penetration. On the other hand, fundamental imaging does not have better resolution than harmonic imaging.
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