1. Roshan Dsouza

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    1. Mentioned In 18 Articles

    2. Clinical translation of handheld optical coherence tomography: practical considerations and recent advancements

      Clinical translation of handheld optical coherence tomography: practical considerations and recent advancements
      Since the inception of optical coherence tomography (OCT), advancements in imaging system design and handheld probes have allowed for numerous advancements in disease diagnostics and characterization of the structural and optical properties of tissue. OCT system developers continue to reduce form factor and cost, while improving imaging performance (speed, resolution, etc.) and flexibility for applicability in a broad range of fields, and nearly every clinical specialty. An extensive array of ...
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    3. Feasibility study of phase-sensitive imaging based on multiple reference optical coherence tomography

      Feasibility study of phase-sensitive imaging based on multiple reference optical coherence tomography
      Multiple reference optical coherence tomography (MR-OCT) is a recently developed, low-cost and compact time-domain OCT solution for primary care and consumer level applications. A combination of a voice coil actuator and a partial mirror (PM) extends the scan range for imaging depths of approximately 1 mm in biological samples. Our previous research on MR-OCT is based only on intensity information obtained from the depth-resolved interference signal. In this Letter, we ...
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    4. Comparing an FFT filter for multiple reference optical coherence tomography (MR-OCT) with an Chebychev and an elliptic filter

      Comparing an FFT filter for multiple reference optical coherence tomography (MR-OCT) with an Chebychev and an elliptic filter
      Portable and low-cost optical coherence tomography (OCT) is increasingly used to improve the accuracy of point-of-care applications. The increasing research efforts to use photonics integrated circuits (PIC) is without doubts the future for highest packaging densities in miniature optical systems. MR-OCT is another technology that is using the advantages of well known CD/DVD-ROM technology to build miniaturized and low-cost OCT systems and may be more readily available before PICs ...
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    5. Development of a first-generation miniature multiple reference optical coherence tomography imaging device

      Development of a first-generation miniature multiple reference optical coherence tomography imaging device
      Multiple reference optical coherence tomography (MR-OCT) is a technology ideally suited to low-cost, compact OCT imaging. This modality is an extension of time-domain OCT with the addition of a partial mirror in front of the reference mirror. This enables extended, simultaneous depth scanning with the relatively short scan range of a miniature voice coil motor on which the scanning mirror is mounted. This work details early stage development of the ...
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    6. The how and why of a $10 optical coherence tomography system

      The how and why of a $10 optical coherence tomography system
      Optical Coherence Tomography (OCT) is the fastest growing medical imaging modality with more than $1Bln worth of scans ordered and over $400M worth of equipment shipped in 2010, just nine years after its commercialization. It is at various stages of acceptance and approvals for eye care, coronary care and skin cancer care and is spreading rapidly to other medical specialties. Indeed, it is the leading success of translation of biophotonics ...
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    7. Evaluation of a polarization sensitive multiple reference optical coherence tomography system

      Evaluation of a polarization sensitive multiple reference optical coherence tomography system
      Multiple reference optical coherence tomography (MR-OCT) is a new compact optical sensor platform based on a small form factor recirculating reference arm scanning optical delay, which promises a robust, cost-effective semisolid state design for integration with next generation mobile devices. The miniature re-circulating optical delay is based on a voice coil motor (VCM) actuator and a partial mirror. Imaging capability of MR-OCT has been recently demonstrated using a non-polarizing bulk ...
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    8. The impact of relative intensity noise on the signal in multiple reference optical coherence tomography

      The impact of relative intensity noise on the signal in multiple reference optical coherence tomography
      Multiple reference optical coherence tomography (MR-OCT) applies a unique low-cost solution to enhance the scanning depth of standard time domain OCT by inserting an partial mirror into the reference arm of the interferometric system. This novel approach achieves multiple reflections for different layers and depths of an sample with minimal effort of engineering and provides an excellent platform for low-cost OCT systems based on well understood production methods for micro-mechanical ...
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    9. Assessment of curing behavior of light-activated dental composites using intensity correlation based multiple reference optical coherence tomography

      Assessment of curing behavior of light-activated dental composites using intensity correlation based multiple reference optical coherence tomography
      Background and Objectives Monitoring the curing kinetics of light-activated resin is a key area of research. These resins are used in restorative applications and particularly in dental applications. They can undergo volumetric shrinkage due to poor control of the depth dependent curing process, modulated by the intensity and duration of the curing light source. This often results in the formation of marginal gaps, causing pain and damage to the restoration ...
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    10. 3D nondestructive testing system with an affordable multiple reference optical-delay-based optical coherence tomography

      3D nondestructive testing system with an affordable multiple reference optical-delay-based optical coherence tomography
      ... Independence Ave., Suite 5B, Mountain View, California 94043, USA *Corresponding author: hrebeshms@gmail.com Roshan Dsouza, Hrebesh M. Subhash, Kai Neuhaus, Josh Hogan, Carol Wilson, and Martin Leahy, "3D nondestructive...
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    11. Characterization of light distribution and optimization of detector position for multiple reference optical coherence tomography

      Characterization of light distribution and optimization of detector position for multiple reference optical coherence tomography
      ...eers (SPIE). Downloading of the abstract is permitted for personal use only. Kai Neuhaus ; Hrebesh Subhash ; Roshan Dsouza ; Josh Hogan ; Carol Wilson ; Martin Leahy; Characterization of light distribution and optimizat...
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  2. About Roshan Dsouza

    Roshan Dsouza

    Roshan Dsouza received his MSc degree in Photonics from Manipal University, India in 2011. His masters project work at Raja Ramanna Centre for Advanced Technology concerned the “Development of   Free Space Combined Optical Coherence Tomography (OCT) – Laser Induced Fluorescence (LIF) System”. He has been awarded the College of Science Fellowship from NUI Galway in September 2011.His current work involves correlation mapping OCT (cmOCT) imaging of the microcirculation and multiple reference OCT - a Compact Imaging project.