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In vitro Assessment of lesion activity using simultaneous time-resolved reflectance imaging at 1300 and 1950 nm.

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Title: In vitro Assessment of lesion activity using simultaneous time-resolved reflectance imaging at 1300 and 1950 nm.
Authors: Wycoff, Spencer1 (AUTHOR), Zhu, Yihua1 (AUTHOR), Fried, Daniel1 (AUTHOR) daniel.fried@ucsf.edu
Source: Lasers in Medical Science. 8/27/2024, Vol. 39 Issue 1, p1-8. 8p.
Subjects: Dental caries, Imaging systems, Photodetectors, Reflectance, Tomography
Abstract: The aim of this study was to explore the feasibility of a time-resolved reflectance imaging system employing a single photodetector to assess the activity of caries lesions that exploits the differential absorption of water at 1300 and 1950 nm. The time-resolved reflectivity of 10 active and 10 arrested lesions on the proximal surfaces and 5 active and 5 arrested lesions on the occlusal surfaces of extracted teeth were monitored simultaneously at 1300 and 1950 nm during forced air drying for 60 s. The presence of a highly mineralized surface zone measured with microcomputed tomography (microCT) was used to indicate lesion activity. Multiple kinetic parameters were extracted from the acquired short wavelength infrared (SWIR) intensity versus time dehydration curves and used to assess lesion activity. Differences in the reflectivity between curves acquired at 1300 and 1950 nm due to differential absorption of water provided improved discrimination between active and arrested lesions over the use of 1950 nm alone. This study demonstrates that it is feasible to use a device with a single photodetector operating at 1950 nm to collect dehydration curves for the assessment of lesion activity and that a system employing two SWIR wavelengths with differential water absorption can improve the performance of lesion activity assessment. [ABSTRACT FROM AUTHOR]
Copyright of Lasers in Medical Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: In vitro Assessment of lesion activity using simultaneous time-resolved reflectance imaging at 1300 and 1950 nm.
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  Data: <searchLink fieldCode="AR" term="%22Wycoff%2C+Spencer%22">Wycoff, Spencer</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhu%2C+Yihua%22">Zhu, Yihua</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fried%2C+Daniel%22">Fried, Daniel</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> daniel.fried@ucsf.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Lasers+in+Medical+Science%22">Lasers in Medical Science</searchLink>. 8/27/2024, Vol. 39 Issue 1, p1-8. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Dental+caries%22">Dental caries</searchLink><br /><searchLink fieldCode="DE" term="%22Imaging+systems%22">Imaging systems</searchLink><br /><searchLink fieldCode="DE" term="%22Photodetectors%22">Photodetectors</searchLink><br /><searchLink fieldCode="DE" term="%22Reflectance%22">Reflectance</searchLink><br /><searchLink fieldCode="DE" term="%22Tomography%22">Tomography</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The aim of this study was to explore the feasibility of a time-resolved reflectance imaging system employing a single photodetector to assess the activity of caries lesions that exploits the differential absorption of water at 1300 and 1950 nm. The time-resolved reflectivity of 10 active and 10 arrested lesions on the proximal surfaces and 5 active and 5 arrested lesions on the occlusal surfaces of extracted teeth were monitored simultaneously at 1300 and 1950 nm during forced air drying for 60 s. The presence of a highly mineralized surface zone measured with microcomputed tomography (microCT) was used to indicate lesion activity. Multiple kinetic parameters were extracted from the acquired short wavelength infrared (SWIR) intensity versus time dehydration curves and used to assess lesion activity. Differences in the reflectivity between curves acquired at 1300 and 1950 nm due to differential absorption of water provided improved discrimination between active and arrested lesions over the use of 1950 nm alone. This study demonstrates that it is feasible to use a device with a single photodetector operating at 1950 nm to collect dehydration curves for the assessment of lesion activity and that a system employing two SWIR wavelengths with differential water absorption can improve the performance of lesion activity assessment. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Lasers in Medical Science is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10103-024-04168-y
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      – Code: eng
        Text: English
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      – SubjectFull: Dental caries
        Type: general
      – SubjectFull: Imaging systems
        Type: general
      – SubjectFull: Photodetectors
        Type: general
      – SubjectFull: Reflectance
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      – SubjectFull: Tomography
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      – TitleFull: In vitro Assessment of lesion activity using simultaneous time-resolved reflectance imaging at 1300 and 1950 nm.
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            – D: 27
              M: 08
              Text: 8/27/2024
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              Y: 2024
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