1 Ocak 2020 Dergi makalesi Açık Erişim

Algarawi, Maha; Erkol, Hakan; Luk, Alex; Ha, Seunghoon; Unlu, Mehmet B.; Gulsen, Gultekin; Nouizi, Farouk

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    <subfield code="a">Resolving tissue chromophore concentration at MRI resolution using multi-wavelength photo-magnetic imaging</subfield>
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    <subfield code="p">BIOMEDICAL OPTICS EXPRESS</subfield>
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    <subfield code="a">Photo-magnetic imaging (PMI) is an emerging optical imaging modality that showed great performance on providing absorption maps with high resolution and quantitative accuracy. As a multi-modality technology, PMI warms up the imaged object using a near infrared laser while temperature variation is measured using magnetic resonance imaging. By probing tissue at multiple wavelengths, concentration of the main tissue chromophores such as oxy-and deoxy-hemoglobin, lipid, and water are obtained then used to derive functional parameters such as total hemoglobin concentration and relative oxygen saturation. In this paper, we present a multi-wavelength PMI system that was custom-built to host five different laser wavelengths. After recovering the high-resolution absorption maps, a least-squared minimization process was used to resolve the different chromophore concentration. The performance of the system was experimentally tested on a phantom with two different dyes. Their concentrations were successfully assessed with high spatial resolution and average accuracy of nearly 80%. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement</subfield>
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    <subfield code="u">Bogazici Univ, Dept Phys, Istanbul, Turkey</subfield>
    <subfield code="a">Erkol, Hakan</subfield>
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    <subfield code="u">Univ Calif Irvine, Ctr Funct Oncoimaging, Irvine, CA 92697 USA</subfield>
    <subfield code="a">Luk, Alex</subfield>
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