Observation of Guided Acoustic Waves in a Human Skull.

@article{Estrada2018ObservationOG,
  title={Observation of Guided Acoustic Waves in a Human Skull.},
  author={H{\'e}ctor Estrada and Sven Gottschalk and Michael Reiss and Volker Neuschmelting and Roland Goldbrunner and Daniel Razansky},
  journal={Ultrasound in medicine \& biology},
  year={2018},
  volume={44 11},
  pages={
          2388-2392
        }
}

Figures and Tables from this paper

Looking at the Skull in a New Light: Rayleigh-Lamb Waves in Cranial Bone

Current knowledge on the ultrasound wave propagation in the cranial bone is restricted to far-field observations. In order to extend our understanding on how ultrasound waves propagate in the skull,

Matrix Pencil Estimation of Guided Waves Dispersion in a Human Skull

Guided Ultrasonic Waves (GUWs) have been recently proposed as an alternative to more classical ultrasonic-based techniques in brain imaging and therapy. The efficient and effective use of GUWs is

EXPERIMENTAL AND COMPUTATIONAL INVESTIGATION OF GUIDEDWAVES IN A HUMAN SKULL

A Engine Atlanta Abstract—We investigate guided (Lamb) waves in a human cadaver skull through experiments and computational simulations. Ultrasonic wedge transducers and scanning laser Doppler

Radiation Characteristics of Cranial Leaky Lamb Waves

Numerically and experimentally investigate the dispersion properties of leaky Lamb waves in the cranial bone and show that, when diploic pores are physically modeled, leakage angles computed from time transient finite-element analyses correspond to those predicted by an equivalent three-layered fluid-loaded waveguide model.

Anisotropic Longitudinal Wave Propagation in Swine Skull

To understand the in-plane elastic character of ultrasonic waves in the skull, longitudinal wave velocities were studied in the MHz range using a conventional pulse technique and anisotropic character in the diploe layer gradually changed with position in the thickness direction.

Transcranial imaging with the optoacoustic memory effect

Severe distortion of ultrasound waves traversing the skull impedes visualization of cerebral structures in humans. Accurate modelling of ultrasound propagation effects is challenging due to highly

High resolution transcranial imaging based on the optoacoustic memory effect

Acoustic impedance mismatches between soft tissues and bones are known to result in strong aberrations in optoacoustic and ultrasound images. Of particular importance are the severe distortions

References

SHOWING 1-10 OF 47 REFERENCES

Prediction and near-field observation of skull-guided acoustic waves

The existence of skull-guided acoustic waves was reported on and confirmed by near-field measurements of optoacoustically-induced responses in ex-vivo murine skulls immersed in water, andersion of the guided waves was found to reasonably agree with the prediction of a multilayered flat plate model.

Broadband acoustic properties of a murine skull

It is anticipated that accurate quantification and modeling of the skull transmission effects would ultimately allow for skull aberration correction in a broad variety of applications employing transcranial detection or transmission of high frequency ultrasound.

Treatment of near-skull brain tissue with a focused device using shear-mode conversion: a numerical study

Shear waves provide a useful method for trans-cranial focusing in regions close to the skull surface and the differences of the degree of focusing observed among patients suggest that the intersection ASW∩ATX can be used as a preliminary criterion for screening and calculation of the acoustic fields should confirm thedegree of focusing patient by patient.

Acoustical properties of the human skull.

  • F. FryJ. Barger
  • Physics
    The Journal of the Acoustical Society of America
  • 1978
It is concluded that with selection of appropriate frequencies (0.5-1.0 MHz) and beam configuration it will be possible to perform clinically significant transkull diagnostic imaging and interrogation in the adult human brain.

Attenuation, scattering, and absorption of ultrasound in the skull bone.

This first measurement of ultrasound absorption in bone can be used to estimate the amount of heat deposition based on knowledge of the acoustic field and it is demonstrated that only a small part of the attenuation is due to absorption inBone and that the majority of the dBs are due to reflection, scattering, and mode conversion.

Guided Waves in Cortical Bone

In the last decade, several experimental studies have shown that long cortical bones act as a natural waveguide at ultrasonic frequencies despite attenuation in bone material and heterogeneity in

Effects of the murine skull in optoacoustic brain microscopy

It is shown that strong low-pass filtering characteristics of the skull may significantly deteriorate the achievable spatial resolution in deep brain imaging where no light focusing is possible and significant improvements are seen through cranial windows and thinned skull experiments.

Non-invasive transcranial ultrasound therapy based on a 3D CT scan: protocol validation and in vitro results

A non-invasive protocol for transcranial brain tissue ablation with ultrasound is studied and validated in vitro, showing a precise refocusing of the ultrasonic beam at the targeted location with a positioning error lower than 0.7 mm.