Determine the tomographic-depth improvement from adaptive confocal filtering

Determine the extent to which combining adaptive confocal filtering with the angular distortion matrix increases the achievable tomographic depth in complex scattering media.

Background

The paper introduces an angular distortion matrix constructed from focused reflection data and uses adaptive confocal filtering to suppress multiple-scattering contributions and electronic noise before estimating local aberration phase laws. The authors report meaningful sound-speed maps in complex breast and liver tissues, suggesting that the filtering strategy can improve aberration estimation under multiple-scattering conditions.

However, the experiments do not establish how much the filtering strategy extends the depth over which reliable wave-speed tomography can be performed. Quantifying this dependence would clarify the method’s practical limits in strongly scattering media and its potential for deeper clinical or other wave-imaging applications.

References

Although our in vivo results show meaningful wave-speed maps in complex tissues, the extent to which this strategy increases the tomographic depth remains to be determined.

— An angular distortion matrix approach for joint wave-speed tomography and aberration correction in scattering media  (2609.09951 - Cui et al., 9 Sep 2026) in Discussion and Conclusion, paragraph beginning “The Gaussian-beam projection introduced here…”