Three-dimensional Optical-resolution Photoacoustic Microscopy

Song Hu; Konstantin Maslov; Lihong V. Wang

doi:10.3791/2729

Tridimensionnelle optique résolution microscopie photoacoustique

JoVE Journal
Bioengineering

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JoVE Journal Bioengineering

Three-dimensional Optical-resolution Photoacoustic Microscopy

Tridimensionnelle optique résolution microscopie photoacoustique

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08:31 min

May 3, 2011

DOI: 10.3791/2729-v

Song Hu¹, Konstantin Maslov¹, Lihong V. Wang¹

¹Optical Imaging Laboratory, Department of Biomedical Engineering,Washington University in St. Louis

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Overview

This article presents a detailed protocol for optical-resolution photoacoustic microscopy (OR-PAM), a non-invasive imaging technique that provides cellular resolution in vivo. The procedure includes anesthetizing the animal, positioning the imaging head, and acquiring images to analyze microcirculation.

Key Study Components

Area of Science

Neuroscience
Imaging Techniques
Photoacoustic Microscopy

Background

OR-PAM is a novel imaging technology.
It allows for imaging of optical absorption contrasts.
The technique is label-free and non-invasive.
It provides insights into microcirculation and oxygen levels in tissues.

Purpose of Study

To demonstrate the use of OR-PAM in vivo.
To provide a visualized instruction on the experimental protocols.
To enhance understanding of microcirculation dynamics.

Methods Used

Anesthetizing the experimental animal.
Positioning the region of interest for imaging.
Setting scanning parameters for image acquisition.
Computing total oxygen concentration and saturation from multi-wavelength data.

Main Results

Successful imaging of microcirculation in vivo.
Acquisition of data on oxygen concentration and saturation.
Demonstration of the non-invasive nature of the technique.
Validation of OR-PAM as a tool for functional imaging.

Conclusions

OR-PAM is effective for imaging microcirculation.
The technique provides valuable information on tissue oxygenation.
It has potential applications in various biomedical research fields.

Frequently Asked Questions

What is optical-resolution photoacoustic microscopy?

It is an imaging technique that combines optical and ultrasound methods to visualize biological tissues.

How does OR-PAM work?

OR-PAM uses laser excitation to generate ultrasound signals from tissues, which are then detected to create images.

What are the advantages of using OR-PAM?

It is non-invasive, label-free, and provides high-resolution images of microcirculation.

What types of data can be obtained from OR-PAM?

Data on oxygen concentration and saturation in tissues can be computed from the images acquired.

Is OR-PAM suitable for all types of biological tissues?

Yes, OR-PAM can be used on various biological tissues, depending on the optical properties.

What is the significance of oxygen saturation measurements?

Oxygen saturation measurements are crucial for understanding tissue health and function.

Optique résolution microscopie photoacoustique (OR-PAM) est une technologie émergente capable d'imagerie d'absorption optique des contrastes

L’objectif global de cette procédure est de démontrer une microscopie photoacoustique à résolution optique in vivo ou, ou Pam de microcirculation qui est non invasive et sans marquage. Pour ce faire, l’animal de laboratoire est d’abord anesthésié. La deuxième étape de la procédure consiste à positionner la région d’intérêt en traduisant la tête d’imagerie de la résolution optique, en définissant les paramètres de balayage du microscope photoacoustique et en lançant l’acquisition de l’image.

En fin de compte, les distributions de la concentration totale d’oxygène et de la saturation en oxygène de l’hémoglobine sont obtenues par le calcul des données expérimentales multi-longueurs d’onde. La microscopie photoacoustique à résolution optique est basée sur l’excitation laser et la détection par ultrasons. Un faisceau laser court est focalisé dans le tissu biologique.

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