Dr. Nishant Mohan Profile

Dr. Nishant Mohan

Vice President of Product

SPIE Involvement:

Author | Prism Awards Judge | Career Lab Leader | Leadership Workshop Facilitator | Career Panelist

Area of Expertise:

Medical Instrumentation , Cameras and Sensors , Leadership , Artificial Intelligence and Machine Learning , Software Development , Product Management

Dr. Mohan has over 15 years of experience in development and commercialization of medical devices and digital imaging technologies. He has led the launch of several products including artificial intelligence platform for optical coherence tomography (OCT), OCT-based angiography systems and high-performance spectrometers dedicated for OCT applications. Dr. Mohan has also played an important role in the development of high-volume consumer medical devices like contact lenses. He is a recipient of the annual early career achievement award by SPIE, the international society for optics and photonics.

Dr. has played a pioneering role in research behind angiography, blood flow measurement and computational methods in OCT imaging. Dr. Mohan serves on several technical conference committees, review panel for international journals, and as a judge from the annual Prism Award. His past positions include Vice President of OCT division at Wasatch Photonics, Director of Product Management and Marketing at Wasatch Photonics, and Senior Engineer at Bausch + Lomb. He holds post-doctoral fellowship from Harvard Medical School, a PhD in Biomedical Engineering from Boston University, and Bachelors from Indian Institute of Technology.

Proceedings Article | 6 March 2023 Presentation

OCT at home: technology, applications, and infrastructure to make it possible

Nishant Mohan

Proceedings Volume PC12369, PC123690F (2023) https://doi.org/10.1117/12.2661106

Read Abstract +

Proceedings Article | 24 February 2010 Paper

Compressed sensing in optical coherence tomography

Nishant Mohan, Ivana Stojanovic, W. Karl, Bahaa Saleh, Malvin Teich

Proceedings Volume 7570, 75700L (2010) https://doi.org/10.1117/12.844217

KEYWORDS: Optical coherence tomography, Compressed sensing, Chemical elements, Charge-coupled devices, Medicine, CCD image sensors, Sensors, Photodiodes, Detector arrays, Speckle

Read Abstract +

Proceedings Article | 6 May 2004 Paper

Soft-tissue and phase-contrast imaging at the Swiss Light Source

Philipp Schneider, Nishant Mohan, Marco Stampanoni, Ralph Muller

Proceedings Volume 5368, (2004) https://doi.org/10.1117/12.533716

KEYWORDS: Bone, Tissues, Absorption, Phase contrast, X-rays, Light sources, Corrosion, Head, Imaging systems, Tomography

Read Abstract +

Recent results show that bone vasculature is a major contributor to local tissue porosity, and therefore can be directly linked to the mechanical properties of bone tissue. With the advent of third generation synchrotron radiation (SR) sources, micro-computed tomography (μCT) with resolutions in the order of 1 μm and better has become feasible. This technique has been employed frequently to analyze trabecular architecture and local bone tissue properties, i.e. the hard or mineralized bone tissue. Nevertheless, less is known about the soft tissues in bone, mainly due to inadequate imaging capabilities. Here, we discuss three different methods and applications to visualize soft tissues. The first approach is referred to as negative imaging. In this case the material around the soft tissue provides the absorption contrast necessary for X-ray based tomography. Bone vasculature from two different mouse strains was investigated and compared qualitatively. Differences were observed in terms of local vessel number and vessel orientation. The second technique represents corrosion casting, which is principally adapted for imaging of vascular systems. The technique of corrosion casting has already been applied successfully at the Swiss Light Source. Using the technology we were able to show that pathological features reminiscent of Alzheimer’s disease could be distinguished in the brain vasculature of APP transgenic mice. The third technique discussed here is phase contrast imaging exploiting the high degree of coherence of third generation synchrotron light sources, which provide the necessary physical conditions for phase contrast. The in-line approach followed here for phase contrast retrieval is a modification of the Gerchberg-Saxton-Fienup type. Several measurements and theoretical thoughts concerning phase contrast imaging are presented, including mathematical phase retrieval. Although up-to-now only phase images have been computed, the approach is now ready to retrieve the phase for a large number of angular positions of the specimen allowing application of holotomography, which is the three-dimensional reconstruction of phase images.

Keywords/Phrases

Search In:

Publication Years