Autocorrelation of scattered laser light for ultrasound-modulated optical tomography in dense turbid media.

نویسندگان

  • Hui Li
  • Lihong V Wang
چکیده

Based on measurement of the intensity autocorrelation function, a new method to determine the modulation depth of scattered laser light modulated by an ultrasonic wave in turbid media was applied to ultrasound-modulated optical tomography. Good signal-to-noise ratios and high sensitivities were demonstrated. Images of double optically absorbing objects buried in a highly optically scattering gel sample were obtained. The contrast was more than 10%, and the spatial resolution was approximately 2 mm.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Ultrasound-modulated optical tomography of absorbing objects buried in dense tissue-simulating turbid media.

Continuous-wave ultrasonic modulation of scattered laser light was used to image objects buried in tissue-simulating turbid media. The buried object had an absorption coefficient greater than the background turbid medium. The ultrasonic wave that was focused into the turbid media modulated the laser light that passed through the ultrasonic field. The modulated laser light that was collected by ...

متن کامل

Continuous-wave ultrasonic modulation of scattered laser light to image objects in turbid media.

Continuous-wave ultrasonic modulation of scattered laser light has been used to image objects in tissue-simulating turbid media for what is to our knowledge the first time. The ultrasound wave focused into the turbid media modulates the laser light passing through the ultrasonic focal zone. The modulated laser light collected by a photomultiplier tube reflects the local mechanical and optical p...

متن کامل

Ultrasound-modulated Optical Tomography for Biomedical Applications

Ultrasound-modulated Optical Tomography for Biomedical Applications. (August 2004) Jun Li, B.Eng., Huazhong University of Science and Technology; M.Eng., Huazhong University of Science and Technology; Ph.D., Huazhong University of Science and Technology Chair of Advisory Committee: Dr. Lihong V. Wang I experimentally studied ultrasound-modulated optical tomography, which holds the promise for b...

متن کامل

Imaging in diffuse media with pulsed-ultrasound-modulated light and the photorefractive effect.

Acousto-optic imaging in diffuse media is a dual wave-sensing technique in which an acoustic field interacts with multiply scattered laser light. The acoustic field causes a phase modulation in the optical field emanating from the interaction region, and this phase-modulated optical field carries with it information about the local optomechanical properties of the media. We report on the use of...

متن کامل

High-sensitivity ultrasound-modulated optical tomography with a photorefractive polymer.

By detecting ultrasonically tagged diffuse light, ultrasound-modulated optical tomography images optical contrast with ultrasonic resolution deep in turbid media, such as biological tissue. However, small detection etendues and weak tagged light submerged in strong untagged background light limit the signal detection sensitivity. In this Letter, we report the use of a large-area (~5 cm×5 cm) ph...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Applied optics

دوره 41 22  شماره 

صفحات  -

تاریخ انتشار 2002