An investigation was made into the nature of the nonlinearity observed in auditory functional magnetic resonance imaging (fMRI) experiments associated with increases in total duration of acoustic imaging noise [e.g., Edmister et al., 1999; Shah et al., 1999]. A two-stimulus, four-condition paradigm was used to evaluate four acoustic conditions involving: (1) the presence or absence of a desired...

This paper investigates a novel method which allows clutter elimination in deep optoacoustic imaging. Clutter significantly limits imaging depth in clinical optoacoustic imaging, when irradiation optics and ultrasound detector are integrated in a handheld probe for flexible imaging of the human body. Strong optoacoustic transients generated at the irradiation site obscure weak signals from deep...

We present tomographic imaging of biological tissues by use of microwave-induced acoustic signal. It was demonstrated that the acoustic signal was proportional to the intensity of the incident microwave and was related to the absorption property of microwave in the medium. Pulsed microwave radiation was used to illuminate the samples. Absorbed microwave energy caused thermoelastic expansion tha...

For classical waves such as light or sound, diffraction sets a natural limit on how finely the details of an object can be recorded on its image. Recently, various optical superlenses based on the metamaterials concept have shown the possibility of overcoming the diffraction limit1–7. Similar two-dimensional (2D) acoustic hyperlens designs have also been explored8–10. Here we demonstrate a 3D h...

In this paper, we provide the mathematical basis for three different magnetoacoustic imaging approaches (vibration potential tomography, magneto-acoustic tomography with magnetic induction, and magneto-acoustic current imaging) and propose new algorithms for solving the inverse problem for each of them.

Tomographic imaging systems utilize various probing waveforms, such as microwaves, acoustic and ultrasound, and light, for different application objectives. This paper provides a comprehensive overview of various tomographic imaging systems operating in different modalities of mono-static, bi-static, and multi-static format in both transmission and reflection modes. Tomographic acoustic microsc...

PURPOSE To compare constructive interference in the steady state (CISS) three-dimensional Fourier transform (3DFT) MR imaging with contrast-enhanced T1-weighted spin-echo MR imaging for accuracy in detecting acoustic schwannoma. METHODS One hundred twenty-five consecutive patients with possible acoustic schwannoma were examined. The accuracy of CISS-3DFT MR imaging in detecting abnormalities ...

OBJECTIVE To assess the validity of acoustic rhinometry for measuring nasal valve area in human subjects. STUDY DESIGN A comprehensive study that compared acoustic rhinometry data with computed tomography findings from scans obtained perpendicular to the acoustic axis and perpendicular to the floor of the nose. METHODS Fifty nasal passages of 25 healthy adults with no nasal disease were exa...