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Non-contact small animal fluorescence imaging system for simultaneous multi-directional angular-dependent data

Jong Hwan Lee¹, Hyun Keol Kim², Chandhanarat Chandhanayingyong³

¹Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace Mudd building, 500 West 120th Street, New York, NY, 10027, USA.

Biomedical Optics Express

|July 30, 2014

Summary

We developed a new non-contact small animal fluorescent molecular tomography (FMT) system with a novel mirror-based imaging head. This system enhances image resolution and data quality for advanced preclinical research.

Keywords:

(170.0110) Imaging systems (170.6280) Spectroscopy, fluorescence and luminescence (170.6960) Tomography

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Area of Science:

Biomedical Engineering
Medical Imaging
Preclinical Research

Background:

Existing mirror-based imaging heads in small animal fluorescent molecular tomography (FMT) suffer from degraded raw data quality due to multiple back reflections.
There is a need for advanced imaging systems that provide high-resolution molecular information in small animals for preclinical research.

Purpose of the Study:

To present a novel non-contact small animal fluorescent molecular tomography (FMT) imaging system.
To improve image resolution and reduce artifacts in FMT by designing a new mirror-based imaging head and incorporating angular dependent data into image reconstruction.

Main Methods:

Designed a novel mirror-based imaging head using two conical mirrors to achieve 360-degree surface measurement and reduce back reflections.
Developed a new ray-transfer operator to include angular dependent data in the image reconstruction process.
Implemented a transport-theory-based image reconstruction algorithm and evaluated system performance using numerical simulations, phantom, and live animal measurements.

Main Results:

The novel imaging head significantly reduced multiple back reflections, improving raw measurement data quality.
The inclusion of angular dependent data led to higher image resolution in the reconstructed images.
System performance evaluation demonstrated the advantages of the new approach in numerical simulations, phantom, and live animal studies.

Conclusions:

The developed non-contact FMT system offers improved image resolution and data quality compared to existing systems.
The novel mirror design and data processing approach are effective for enhancing small animal molecular imaging.
This system holds promise for advancing preclinical research by providing more accurate molecular information in vivo.