Volume 11, Issue 1
Featured Article

The Centiloid Project: Standardizing quantitative amyloid plaque estimation by PET

William E. Klunk

Corresponding Author

E-mail address: klunkwe@upmc.edu

Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA

Department of Neurology, University of Pittsburgh, Pittsburgh, PA, USA

Corresponding author. Tel.: +1‐412‐246‐6460; Fax: +1‐412‐246‐6465. E-mail address: klunkwe@upmc.eduSearch for more papers by this author
Robert A. Koeppe

Department of Radiology, University of Michigan, Ann Arbor, MI, USA

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Julie C. Price

Department of Radiology, University of Pittsburgh, Pittsburgh, PA, USA

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Tammie L. Benzinger

Department of Radiology, Massachusetts General Hospital, Boston, MA, USA

Department of Neurosurgery, Washington University, Saint Louis, MO, USA

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Michael D. Devous Sr.

Department of Neurology, UT Southwestern Medical Center, Dallas, TX, USA

Department of Radiology, UT Southwestern Medical Center, Dallas, TX, USA

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William J. Jagust

Helen Wills Neuroscience Institute, University of California Berkeley, Berkeley, CA, USA

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Keith A. Johnson

Department of Radiology, Massachusetts General Hospital, Boston, MA, USA

Department of Neurology, Massachusetts General Hospital, Boston, MA, USA

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Chester A. Mathis

Departments of Radiology, Pharmacology and Biological Chemistry, and Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, PA, USA

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Davneet Minhas

Department of Radiology, University of Pittsburgh, Pittsburgh, PA, USA

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Michael J. Pontecorvo

Avid Radiopharmaceuticals, Philadelphia, PA, USA

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Christopher C. Rowe

Department of Nuclear Medicine and Centre for PET, Austin Health, Melbourne, VIC, Australia

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Daniel M. Skovronsky

Avid Radiopharmaceuticals, Philadelphia, PA, USA

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Mark A. Mintun

Avid Radiopharmaceuticals, Philadelphia, PA, USA

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First published: 28 October 2014
Citations: 20

Abstract

Although amyloid imaging with PiB‐PET ([C‐11]Pittsburgh Compound‐B positron emission tomography), and now with F‐18‐labeled tracers, has produced remarkably consistent qualitative findings across a large number of centers, there has been considerable variability in the exact numbers reported as quantitative outcome measures of tracer retention. In some cases this is as trivial as the choice of units, in some cases it is scanner dependent, and of course, different tracers yield different numbers. Our working group was formed to standardize quantitative amyloid imaging measures by scaling the outcome of each particular analysis method or tracer to a 0 to 100 scale, anchored by young controls (≤45 years) and typical Alzheimer's disease patients. The units of this scale have been named “Centiloids.” Basically, we describe a “standard” method of analyzing PiB PET data and then a method for scaling any “nonstandard” method of PiB PET analysis (or any other tracer) to the Centiloid scale.

Number of times cited according to CrossRef: 20

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