U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Brian E. Zimmerman (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 26 - 50 of 75

Dose calibrator manufacturer-dependent bias in assays of 123I

March 26, 2014
Author(s)
Denis E. Bergeron, Jeffrey T. Cessna, Daniel B. Golas, Rheannan K. Young, Brian E. Zimmerman
Calibration factors for commercial ionization chambers (i.e. dose calibrators) were determined for a solution of 123I; the activity was based on the 1976 NBS standard. A link between the NIST standard and the International Reference System (SIR) was

A New NIST Primary Standardization of 18F

February 1, 2014
Author(s)
Ryan P. Fitzgerald, Brian E. Zimmerman, Denis E. Bergeron, Jeffrey T. Cessna, Leticia S. Pibida, Denise S. Moreira
A new primary standardization of 18F by NIST is reported. The standard is based on live-timed beta- gamma anticoincidence counting with confirmatory measurements by three other methods: (i) liquid scintillation (LS) counting using CIEMAT/NIST 3H efficiency

Results of an international comparison for the activity measurement of 177Lu

March 6, 2012
Author(s)
Brian E. Zimmerman, Denis E. Bergeron, Jeffrey T. Cessna
An international Key Comparison of 177Lu has recently been carried out. Twelve laboratories performed assays for radioactivity content on aliquots of a common master solution of 177Lu, leading to eleven results submitted for entry into the Key Comparison

A Collaborative Enterprise for Multi-Stakeholder Participation in the Advancement of Quantitative Imaging

March 1, 2011
Author(s)
Lisa R. Karam, Andrew Buckler, Hugo J. Aerts, Bernard Bendriem, Claus Bendtsen, Ronald Boellaard, John M. Boone, Linda Bresolin, Deborah Burstein, William Bushnell, Patricia E. Cole, James J. Conklin, Gary S. Dorfman, Pamela S. Douglas, N. R. Dunnick, Willy Eidsaunet, Cathy Elsinger, Richard F. Frank, Constantine Gatsonis, Maryellen L. Giger, David Gustafson, Sandeep N. Gupta, Otto S. Hoekstra, Edward F. Jackson, Gary J. Kelloff, Paul E. Kinahan, Geoffrey McLennan, Colin G. Miller, P D. Mozley, Keith E. Muller, Kevin O'Donnell, Rick Patt, Divid Raunig, Mark Rosen, Heren Rupani, Lawrence H. Schwartz, Barry A. Siegel, A. G. Sorensen, Richard L. Wahl, John C. Waterton, Walter Wolf, Gudrun Zahlmann, Brian E. Zimmerman, Daniel C. Sullivan
Medical imaging has seen significant and rapid technical advances over the last decade, including image acquisition devices, processing and analysis software, and agents to enhance specificity. Traditionally medical imaging has defined anatomy, but

TDCR Measurements on Pu-241 at NIST

December 21, 2010
Author(s)
Denis E. Bergeron, Brian E. Zimmerman
We have performed a series of measurements on a Pu-241 solution using the triple-to-double coincidence ratio (TDCR) liquid scintillation technique. A similar series of measurements in 2007 revealed significant discord between activity values determined via

Investigation into the Standardization of Tc-99

July 30, 2010
Author(s)
Lizbeth Laureano-Perez, Ronald Colle, Ryan P. Fitzgerald, Brian E. Zimmerman, Lonnie T. Cumberland
The standardization of 99Tc by several primary methods was investigated. This was performed to support a new 99Tc transfer standard that has been developed and will be disseminated by the National Institute of Standards and Technology (NIST) as Standard

A New Primary Standardization of Th-229

January 7, 2010
Author(s)
Ryan P. Fitzgerald, Lizbeth Laureano-Perez, Michelle M. Hammond, Leticia S. Pibida, Svetlana Nour, Brian E. Zimmerman
The National Institute of Standards and Technology (NIST) has certified a high-purity Th-229 Standard Reference Material as SRM 4328C, based on live-timed 4-pi alpha,beta-gamma anticoincidence counting (LTAC) of the equilibrium solution. The LTAC system

Development of secondary standards for radium-223

November 5, 2009
Author(s)
Denis E. Bergeron, Brian E. Zimmerman, Jeffrey T. Cessna
223Ra is a bone-seeking alpha emitter, and as such is currently being evaluated as a radiopharmaceutical for the treatment of skeletal metastases. In the clinical setting, dosage measurements are typically achieved with reentrant ionization chambers

Standardization of 68Ge/68Ga using three liquid scintillation counting-based methods

October 31, 2008
Author(s)
Brian E. Zimmerman, Jeffrey T. Cessna, Ryan P. Fitzgerald
A solution containing 68Ge in equilibrium with its daughter, 68Ga, has been standardized for the first time at the National Institute of Standards and Technology using 3 liquid scintillation- based techniques: live-timed 4pb-g anticoincidence (LTAC)

Traceability in Nuclear Medicine

October 16, 2008
Author(s)
Brian E. Zimmerman, Steven Judge
Accurate, reproducible measurement of radioactivity in nuclear medicine applications is vital to ensuring the safety and effectiveness of disease diagnosis and treatment using unsealed radioactive sources. The need to maintain a high degree of confidence