Blar i NTNU Open på forfatter "Kumar, Rajesh"
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Assessment of Articular Cartilage by Second Harmonic Microscopy: Challenges and Opportunities
Kumar, Rajesh; Kumar, Anup (Journal article; Peer reviewed, 2019)Second harmonic microscopy (SHM) has emerged as a powerful non-destructive optical imaging modality that has high potential to perform the advanced structural characterization of intact articular cartilage. This article ... -
Automated calibration and control for polarization resolved second harmonic generation on commercial microscopes
Romijn, Elisabeth Inge; Finnøy, Andreas; Kumar, Rajesh; Lilledahl, Magnus Borstad (Journal article; Peer reviewed, 2018)Polarization-resolved second harmonic generation (P-SHG) microscopy has evolved as a promising technique to reveal subresolution information about the structure and orientation of ordered biological macromolecules. To ... -
Comparison of Compressive Stress-Relaxation Behavior in Osteoarthritic (ICRS Graded) Human Articular Cartilage
Kumar, Rajesh; Pierce, David M.; Isaksen, vidar; Davies, Catharina de Lange; Drogset, Jon Olav; Lilledahl, Magnus Borstad (Journal article; Peer reviewed, 2018)Osteoarthritis (OA) is a common joint disorder found mostly in elderly people. The role of mechanical behavior in the progression of OA is complex and remains unclear. The stress-relaxation behavior of human articular ... -
Label-free non-linear multimodal optical microscopy—basics, development, and applications
Mazumder, Nirmal; Balla, Naveen K.; Zhuo, Guan-Yu; Kistenev, Yury V.; Kumar, Rajesh; Kao, Fu-Jen; Brasselet, Sophie; Nikolaev, Viktor V.; Krivova, Natalya A. (Journal article; Peer reviewed, 2019)Non-linear optical (NLO) microscopy has proven to be a powerful tool especially for tissue imaging with sub-cellular resolution, high penetration depth, endogenous contrast specificity, pinhole-less optical sectioning ... -
Mueller matrix three-dimensional directional imaging of collagen fibers
Ellingsen, Pål Gunnar; Aas, Lars Martin Sandvik; Hagen, Vegard Stenhjem; Kumar, Rajesh; Lilledahl, Magnus Borstad; Kildemo, Morten (Journal article; Peer reviewed, 2014)A method for measuring three-dimensional (3-D) direction images of collagen fibers in biological tissue is presented. Images of the 3-D directions are derived from the measured transmission Mueller matrix images (MMIs), ... -
Nonlinear optical microscopy and Raman spectroscopy analysis of Osteoarthritis
Kumar, Rajesh (Doctoral thesis at NTNU;2015:113, Doctoral thesis, 2015)Can Osteoarthritis be diagnosed at an early stage? Osteoarthritis (OA) is a highly prevalent, disabling, complex joint disorder, and a leading cause of individual and socioeconomic burden. The tissue that contributes ... -
Nonlinear optical microscopy of early stage (ICRS Grade-I) osteoarthritic human cartilage
Kumar, Rajesh; Grønhaug, Kirsten Marie; Davies, Catharina De Lange; Drogset, Jon Olav; Lilledahl, Magnus Borstad (Journal article; Peer reviewed, 2015) -
Optical investigation of osteoarthritic human cartilage (ICRS grade) by confocal Raman spectroscopy: a pilot study
Kumar, Rajesh; Grønhaug, Kirsten Marie; Afseth, Nils Kristian; Isaksen, vidar; Davies, Catharina de Lange; Drogset, Jon Olav; Lilledahl, Magnus Borstad (Journal article; Peer reviewed, 2015)Biomolecular changes in the cartilage matrix during the early stage of osteoarthritis may be detected by Raman spectroscopy. The objective of this investigation was to determine vibrational spectral differences among ... -
QoS aware resource allocation for coexistence mechanisms between eMBB and URLLC: Issues, challenges, and future directions in 5G
Kumar, Rajesh; Sinwar, Deepak; Singh, Vijander (Peer reviewed; Journal article, 2023)5G NR enables three types of use case scenarios viz. enhance mobile broadband (eMBB), ultra-reliable low latency communication (URLLC), and massive machine type communication (mMTC). The eMBB is suitable for applications ... -
Single Cell Confocal Raman Spectroscopy of Human Osteoarthritic Chondrocytes: A Preliminary Study
Kumar, Rajesh; Singh, Gajendra Pratap; Grønhaug, Kirsten Marie; Afseth, Nils Kristian; Davies, Catharina De Lange; Drogset, Jon Olav; Lilledahl, Magnus Borstad (Journal article; Peer reviewed, 2015)A great deal of effort has been focused on exploring the underlying molecular mechanism of osteoarthritis (OA) especially at the cellular level. We report a confocal Raman spectroscopic investigation on human osteoarthritic ...