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- Berg, R, et al.
(författare)
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Medical Transillumination Imaging Using Short-pulse Diode-lasers
- 1993
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Ingår i: Optical Society of America. Journal B: Optical Physics. - 0740-3224. ; 32:4, s. 574-579
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Tidskriftsartikel (refereegranskat)abstract
- The recently introduced time-resolved technique for enhanced medical transillumination imaging has been demonstrated for the important case of a diode laser transmitter. This type of gated-viewing technique utilizes early received light only to reject multiply scattered, delayed light, normally blurring the image. Human breast-cancer detection is demonstrated in vitro, and the observations are explained by using theoretical modeling and tissue phantom experiments.
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- Berg, R, et al.
(författare)
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Time-gated viewing studies on tissuelike phantoms
- 1996
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Ingår i: Applied Optics. - 2155-3165. ; 35:19, s. 3432-3440
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Tidskriftsartikel (refereegranskat)abstract
- A time-gated technique to enhance viewing through highly scattering media such as tissue is discussed. Experiments have been performed on tissue like plastic phantoms to determine the possibilities and limitations of the technique. The effects of the time-gate width and the localization, size, and optical properties of hidden objects have been studied. A computer model to simulate light propagation in tissue is also presented. The predictions of the model are compared with experimental results. (C) 1996 Optical Society ofAmerica
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| 9. |
- Jarlman, O, et al.
(författare)
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Laser transillumination of breast tissue phantoms using time-resolved techniques
- 1996
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Ingår i: European Radiology. - 0938-7994. ; 6:3, s. 387-392
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Tidskriftsartikel (refereegranskat)abstract
- The objective of this study was to evaluate a pulsed laser transillumination technique based on time-resolved detection on breast-tissue-like phantoms. Experiments have been performed on tissue-like plastic phantoms with different scattering characteristics. The effects of time-gate width, size, localisation and refractive index of hidden objects have been scrutinised. Our study showed that the shorter the time-gate the higher the contrast. The contrast is very dependent of the size of the hole, whereas the full width half maximum is not. Furthermore, the investigation showed that the changes of early detected light in an experimental setting is due to scattering, adn not to a higher speed of the transmitted light.
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- Jarlman, O, et al.
(författare)
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Time-resolved white light transillumination for optical imaging
- 1997
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Ingår i: Acta Radiologica. - : SAGE Publications. - 1600-0455 .- 0284-1851. ; 38:1, s. 185-189
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: To describe a new breast-imaging method with the potential of multi-spectral optical transillumination based on a time-resolved technique. Material and Methods: A breast phantom was irradiated with ultra-short laser pulses of white light generated by self-phase modulation of an incident high-power laser pulse in water. Time-resolved detection of the transmitted light was performed. Contrast resolution was studied using different absorbers located inside the breast phantom. Results and Conclusion: The results showed that simultaneous, multi-spectral transillumination is possible. The technique can also be used for measurements of optical properties in tissue.
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