P. E. Kinahan, D. W. Byrd, B. Helba, K. A. Wangerin, X. Liu, J. R. Levy, K. C. Allberg, K. Krishnan, R. S. Avila, “Simultaneous estimation of bias and resolution in PET images with a long-lived pocket phantom system”, Tomography, 4(1), pp 33-41, Mar 2018. PDF, CITE
C. Henschke, D. Yankelevitz, R. Yip, V. Archer, G. Zahlmann, K. Krishnan, B. Helba, R. Avila, “Tumor volume measurement error using computed tomography imaging in a phase II clinical trial in lung cancer”, Journal of Medical Imaging, 3(3), Jul 2016. PDF, CITE
R. Varadhan, G. Karangelis, K. Krishnan, S. Hui, “A framework for Deformable Image Registration validation in Radiotherapy clinical applications”, Journal of Applied Clinical Medical Physics, 14(1), Jan, 2013. CITE
MR Cheung, K Krishnan, “Using manual prostate contours to enhance Deformable Registration of EndoRectal MRI”, Computer methods and programs in Biomedicine, 2012. CITE
K. Krishnan, L. Ibanez, W. D. Turner, J. Jomier, R. S. Avila, “An open-source toolkit for the volumetric measurement of CT Lung Lesions”, Optics Express, 18(14), Jul 2010. CITE
M.R.Cheung, K.Krishnan, “Quantifying the Accuracy of Deformable Registration of Endorectal Prostate MRI: Implication for Treatment Margin for Intraprostatic Boost”, International Journal of Radiation Oncology Biology Physics, 75(3), Nov 2009. CITE
M.R. Cheung, K. Krishnan, “Interactive deformable registration of endorectal prostate MRI using Thin Plate Splines”, Academic Radiology, 16(3), pp 351-57, Mar 2009. CITE
K. Krishnan, M. W. Marcellin, A. Bilgin, M. S. Nadar, “Efficient Transmission of Compressed Data for Remote Volume Visualization”, IEEE Transactions on Medical Imaging, 25(9), pp 1189-99, Sep 2006. PDF, CITE
K. Krishnan, W. Schroeder, D. DeMarle, “Interaction, Widgets and Selection”, Book Chapter in The VTK Users Guide, 11th Ed, Kitware Inc, 2010. BUY
B. Ajani, A. Bharadwaj, K. Krishnan, “Volumetric Clipping Surface: Un-occluded visualization of structures preserving depth cues into surrounding organs”, Medical Image Computing and Computer Assisted Intervention (MICCAI), Sep 2018. [podium presentation] CITE
A. Raj, S. Vishwanathan, B. Ajani, K. Krishnan, H. K. Agarwal, “Automatic Knee Cartilage Segmentation using Fully Volumetric Convolutional Neural Networks for evaluation of Osteoarthritis”, Intl. Symposium on BioMedical Imaging (ISBI), Apr 2018. CITE
B. Ajani, A. Bharadwaj, K. Krishnan, “Automatic and Fast CT Liver Segmentation using Sparse Ensemble with Machine Learned contexts”, Proc. SPIE Medical Imaging, Houston, Feb 2018. [podium presentation] CITE
B. Ajani, K. Krishnan, “Automatic and Interactive Prostate Segmentation in MRI using learned contexts on a sparse graph template”, Proc. IEEE Intl. Symposium on BioMedical Imaging (ISBI), Melbourne, Apr 2017. [podium presentation, acceptance rate 19%] CITE
K. Krishnan, K. Reddy, B. Ajani, P. Yelavarthy, “Rapid perfusion quantification using Welch-Satterthwaite approximation and analytical spectral filtering”, Proc. SPIE Medical Imaging, Orlando, Feb 2017. [podium presentation, acceptance rate 13%] CITE
K. Krishnan, N. Desai, “A Markov Random Field Orienation prior for Electronic Cleansing in CT Colonography”, Proc. IEEE Engineering in Medicine and Biology Society (EMBC), pp 2018-21, Milan, Aug 2015. [podium presentation] CITE
K. Krishnan, A. Madrosiya, N. Desai, “Colon centerline extraction in fragmented segmentations”, Proc. IEEE Engineering in Medicine and Biology Society (EMBC), pp 3017-20, Milan, Aug 2015. CITE
K. Krishnan, Y. Soniwal, A. Madrosiya, N. Desai, “Colorectal Polyp Segmentation using Front Propagation on Surfaces Guided by Shape”, Proc. IEEE Engineering in Medicine and Biology Society (EMBC), pp 3093-6, Milan, Aug 2015. CITE
R. Avila, K. Krishnan, B. Helba, D. Yankelevitz, E. Hanson, “A new platform for Quantitative CT Imaging Dose Optimization”, Imaging and Applied Optics, Optical Society of America, Jun 2013. [podium presentation] CITE
E. Wilson, J Ding, C Carignan, K. Krishnan, R Avila, W Turner, D. Stoianovici, D Yankelevitz, F Banovac, K Cleary, “Evaluation of nonholonomic needle steering using a robotic needle driver”, SPIE Medical Imaging, San Diego, Feb, 2010. CITE
H.E. Cline, K. Krishnan, S. Napel, G. D. Rubin, W. D. Turner, R.S. Avila, “Automated coronary CT angiography plaque-lumen segmentation”, SPIE Medical Imaging, Orlando, Feb 2009. [podium presentation, acceptance rate 13%] CITE
K. Krishnan, M. R. Cheung, “Evaluation of the accuracy of Deformable Registration of Prostate MRI for targeted prostate cancer radiotherapy”, Proc. SPIE Medical Imaging, Orlando, Feb 2009. CITE
A. Tabesh, A. Bilgin, K. Krishnan, M. W. Marcellin, “JPEG2000 and motion JPEG2000 content analysis using codestream length information”, Proc. IEEE Data Compression Conference, pp. 329-337, Utah, Mar 2005. CITE
B Odry, K. Krishnan, J Johnson, DP Naidich, CL Novak, MW Marcellin, “Effects of 3D region based compression on the performance of an automatic lung nodule detection system”, Proc. SPIE Medical Imaging, pp 883-94, San Diego, Feb 2005. CITE
K. Krishnan, M. W. Marcellin, A. Bilgin, M. S. Nadar, “Prioritization of Compressed Data by Tissue Type Using JPEG2000”, Proc. SPIE Medical Imaging, vol. 5748, pp. 181-189, San Diego, Feb 2005. [podium presentation] PDF, CITE
K. Krishnan, M. W. Marcellin, A. Bilgin, M. S. Nadar, “Compression / Decompression strategies for large volume Medical Imagery”, Proc. SPIE Medical Imaging, vol. 5371, pp. 152-159, San Diego, Feb 2004. [podium presentation] CITE
A. Raj, B. Ajani, K. Krishnan, S. Viswanathan, H. K. Agarwal, “3D Deep Learning Based Cartilage Segmentation for Visualization and Analysis of Quantitative MRI for Osteoarthritis”, ISMRM Workshop on Osteoarthritis Imaging, Sydney, Apr 2017. PDF, CITE
K. Krishnan, Y. Soniwal, A. Madrosiya, N. Desai, “Shape-Aware Segmentation of Colorectal Polyps in CT Colonography using Surface-Based Front Propagation”, MICCAI, Interactive Medical Image Computing (IMIC) workshop, Munich, Oct 2015. [podium presentation] PDF, CITE
R. Avila, D. Yankelevitz, C. Henschke, K. Krishnan, A. Voss, G. Zahlmann, “The evaluation of a new Pocket-Sized CT Calibration Phantom”, RSNA, Chicago, Dec 2010. [podium presentation]
K. Krishnan, L.Ibanez, W.D.Turner, R.S. Avila, “Architecture, Algorithms and Validation of an open source toolkit for CT Lung Lesion Segmentation”, Medical Image Computing and Computer Assisted Intervention (MICCAI), Pulmonary Image Analysis workshop, London, Sep 2009. [podium presentation] PDF, CITE
B. Ajani, K. Krishnan, “Automatic and Prostate Segmentation in MRI using learned contexts on a sparse graph template”, MICCAI Prostate Segmentation Challenge (PROMISE), 2016. PDF
B. Ajani, K. Krishnan, “Prostate segmentation in MR using 3D Convolutional Neural Networks with mean surface distance minimization loss”, MICCAI Prostate Segmentation Challenge (PROMISE), 2016. PDF
K. Krishnan, A. Madrosiya, “Introducing GPU Accelerated Volumetric Isosurface Rendering and dual isosurface rendering into VTK”, VTK Journal, Contribution, May 2016. PDF
K. Krishnan, A. Madrosiya, “Introducing GPU Accelerated Volumetric co-rendering into VTK”, VTK Journal, Contribution, May 2016. PDF
K. Krishnan, “Geodesic Computations on Surfaces - Introducing a Fast Marching library on Meshes”, VTK Journal, Jun 2013. PDF, CITE
X. Liu, B Helba, K. Krishnan, P. Reynolds, M. McCormick, W. Turner, L. Ibanez, D. Yankelevitz, R. Avila, “Fostering Open Science in Lung Cancer Lesion Sizing with ITK module LSTK”, Insight Journal, Jul 2012. PDF, CITE
R.S. Avila, K. Krishnan, L. Ibanez, J. Jomier, W. D. Turner, “An open source toolkit for Quantitative Lesion Sizing”, RSNA Reading Room of the Future Showcase, Chicago, Dec 2009. PDF, CITE
K. Krishnan, L. Ibanez, R. S. Avila, W. D. Turner, H. E. Cline, “An open source toolkit for CT lung lesion sizing”, CAD Workshop, SPIE Medical Imaging, Orlando FL, Feb 2009. CITE
J. Melonakos, K. Krishnan, A. Tannenbaum, “An ITK filter for bayesian segmentation”, Insight Journal 2006. PDF
N Kaushal, K Raja, A A Kothawala, K Krishnan, S Seth, P Vajinepalli, E M. Canfield, Defining preset parameter values for an ultrasound imaging system, Koninklijke Philips N.V., WO2023036778A1, EP4145458A1
S Bhowmick, S Seth, K Krishnan, C Firtion, P Vajinepalli, Method and system for automatically detecting anatomical structures in a medical image, Koninklijke Philips NV, US20230038364A1, WO2021144230A1, EP3852054A1
K Krishnan, C Firtion, P Vajinepalli, G. Rajagopalaiah, S Chatterjee, R. Trahms, E. M. Canfield, M. Rielly, D. N. Roundhill, Guided acquisition of a 3d representation of an anatomical structure, Koninklijke Philips N.V., WO2022112068A1
K Krishnan, C Firtion, P Vajinepalli, S Chatterjee, G. Rajagopalaiah, M. Rielly, Rendering and displaying a 3d representation of an anatomical structure, Koninklijke Philips N.V., WO2022096404A1
S Bhowmick, K Krishnan, K R Katipally, G Narasapura, C Firtion, S Seth, P Vajinepalli, D N Roundhill, M Rielly, Generation of m-mode data for detecting fetal cardiac activity, Koninklijke Philips N.V., WO2022268844A1, EP4108178A1
Pallavi Vajinepalli, Ravindranath Radhakrishnan, Hansjoerg Geywitz, Karthik Krishnan, Nitesh Kaushal, Celine Firtion, Hoa Pham, An apparatus for monitoring a heartbeat of a fetus, Koninklijke Philips N.V., WO2022152633A1
Karthik Krishnan, Celine Firtion, Subhendu Seth, Pallavi Vajinepalli, David Nigel Roundhill, Computer-implemented method for visualization of an elongated anatomical structure, Koninklijke Philips N.V., WO2021197948A1, EP4125610A1
Karthik Krishnan, Karan Kumar, Celine Firtion, Saunak Chatterjee, Pallavi Vajinepalli, Robert Trahms, Earl Canfield, Matthew Rielly, Methods and systems for fetal heart assessment, Koninklijke Philips N.V., WO2021165037A1, EP3888558A1
Mala Sivakumar, Thomas Brown, Karthik Krishnan, Methods and Systems for Generating Three-Dimensional Images that Enable Improved Visualization and Interaction with Objects in the Three-Dimensional Images, Rapiscan Systems Inc, US20210225088A1
Bhavya Ajani, Karthik Krishnan, Hyunhee Jo, Sejin Yoo, Un-occluded visualization of focus with depth continuity with context in Volume Rendering, Samsung Electronics Co Ltd, US20210335030A1
Ricardo Avila, Karthik Krishnan, Calibration phantom device and analysis methods, WO2011143143A2
Karthik Krishnan, Michael Marcellin, Mariappan S. Nadar, Arun Krishnan, Prioritized image visualization from scalable compressed data, Siemens Medical Solutions USA, US20060031372A1, DE102005007530B4