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Author: John Lu

Displaying records 1 to 10 of 14 records.
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1. Comparison of 1D, 2D and 3D nodule sizing methods by radiologists for spherical and complex nodules on thoracic CT phantom images
Published: 1/11/2014
Authors: John Lu, Charles D. Fenimore
Abstract: Purpose: To estimate the bias and variance of radiologists measuring the size of spherical and complex synthetic nodules. Methods: This study did not require IRB approval. Six radiologists estimated the size of 10 synthetic nodules embedded within ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912057

2. Phase-coded volume holographic gratings for spatial-spectral imaging filters
Published: 2/15/2013
Author: John Lu
Abstract: We present a design of phase contrast filters embedded in a three-dimensional (3D) pupil to form phase-coded volume holographic gratings (VHG) for spatial-spectral imaging. The phase-coded VHG improves image contrast and results in strong filtering p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913186

3. Statistical Analysis of Reader Measurement Variability in Nodule Sizing with CT Phantom Imaging Data
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7879
Published: 11/23/2012
Authors: John Lu, Charles D. Fenimore, Nicholas Petrick, Rongping Zeng, Marios A Gavrielides, David Clunie, Kristin Borradaile, Robert Ford, Hyun J. Grace Kim, Michael McNitt-Gray, Binsheng Zhao, Andrew Buckler
Abstract: RSNA has conducted a phantom quantitative imaging biomarker (QIBA) study to assess reader measurement variability of both spherical and non-spherical nodules using CT imaging. Statistical analysis of intra-reader and inter-reader variability of v ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911246

4. An Empirical Bayes Approach to Robust Variance Estimation: A Statistical Proposal for Quantitative Medical Image Testing
Published: 10/23/2012
Authors: John Lu, Charles D. Fenimore
Abstract: The current standard for measuring tumor response using X-ray, CT and MRI is based on the response evaluation crite- rion in solid tumors (RECIST) which, while providing simplifications over previous (WHO) 2-D methods, stipulate four response categor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912176

5. Big Data Issues in Quantitative Imaging
Series: OTHER
Published: 8/29/2012
Authors: Mary C Brady, Alden A Dima, Charles D. Fenimore, James J Filliben, John Lu, Adele P Peskin, Mala Ramaiah, Ganesh Saiprasad, Ram D Sriram
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911670

6. Development of a Seebeck Coefficient Standard Reference Material (SRM),
Published: 8/1/2011
Authors: Nathan Lowhorn, Winnie K Wong-Ng, John Lu, Joshua Brooks Martin, Martin L Green, John E Bonevich, Evan L. Thomas, Neil Dilley, Jeff Sharp
Abstract: We have successfully developed a Seebeck coefficient Standard Reference Material (SRM,), Bi2Te3, that is essential for interlaboratory data comparison and for instrument calibration. Certification measurements were performed using a differential stea ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907792

7. Comparison of Confidence Intervals for Large Operational Biometric Data by Parametric and Non-parametric Methods
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7740
Published: 11/23/2010
Authors: Su Lan Cheng, Ross J Micheals, John Lu
Abstract: Receiver operating characteristic (ROC) or Detection Error Trade-off (DET) curves are used to measure the performance of a biometric verification or identification system. To go beyond the ROC/DET and to enhance evaluation of a verification system w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906844

8. Development of a Seebeck Coefficient Standard Reference Material
Published: 8/7/2009
Authors: Nathan Lowhorn, Winnie K Wong-Ng, John Lu, Evan L. Thomas, Makoto Otani, Martin L Green, Neil Dilley, Jeffrey Sharp, Thanh N. Tran
Abstract: We have successfully developed a Seebeck coefficient Standard Reference Material (SRM ), Bi2Te3, that is crucial for interlaboratory data comparison and for instrument calibration. Certification measurements were performed using two different techniq ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854458

9. Statistical analysis of a round-robin measurement survey of two candidate materials for a Seebeck coefficient Standard Reference Material
Published: 2/2/2009
Authors: John Lu, Nathan Lowhorn, Winnie K Wong-Ng, Weiping Zhang, Evan L. Thomas, Makoto Otani, Martin L Green, Thanh N. Tran, Chris Caylor, Neil Dilley, Adams Downey, B Edwards, Norbert Elsner, S Ghamaty, Timothy Hogan, Qing Jie, Qiang Li, Joshua Brooks Martin, George S. Nolas, H Obara, Jeffrey Sharp, Rama Venkatasubramanian, Rhonda Willigan, Jihui Yang, Terry Tritt
Abstract: In an effort to develop a Standard Reference Material (SRM ) for Seebeck coefficient, we have conducted a round-robin measurement survey of two candidate materials undoped Bi2Te3 and constantan (55% Cu and 45% Ni alloy). Measurements were performe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854434

10. Round-Robin Studies of Two Potential Seebeck Coefficient Standard Reference Materials
Published: 1/14/2009
Authors: Nathan Lowhorn, Winnie K Wong-Ng, Weiping Zhang, John Lu, Makoto Otani, Evan L. Thomas, Martin L Green, Thanh Tran
Abstract: The scientific activities of NIST include the development and distribution of standard reference materials (SRM) for instrument calibration and inter-laboratory data comparison. Full characterization of a thermoelectric material requires measurement ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851059



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