Impact of New Scatter Correction Strategies on High-Resolution Research Tomograph Brain PET Studies.

Abstract:

PURPOSE:The aim of this study is to evaluate the impact of different scatter correction strategies on quantification of high-resolution research tomograph (HRRT) data for three tracers covering a wide range in kinetic profiles. PROCEDURES:Healthy subjects received dynamic HRRT scans using either (R)-[(11)C]verapamil (n = 5), [(11)C]raclopride (n = 5) or [(11)C]flumazenil (n = 5). To reduce the effects of patient motion on scatter scaling factors, a margin in the attenuation correction factor (ACF) sinogram was applied prior to 2D or 3D single scatter simulation (SSS). RESULTS:Some (R)-[(11)C]verapamil studies showed prominent artefacts that disappeared with an ACF-margin of 10 mm or more. Use of 3D SSS for (R)-[(11)C]verapamil showed a statistically significant increase in volume of distribution compared with 2D SSS (p < 0.05), but not for [(11)C]raclopride and [(11)C]flumazenil studies (p > 0.05). CONCLUSIONS:When there is a patient motion-induced mismatch between transmission and emission scans, applying an ACF-margin resulted in more reliable scatter scaling factors but did not change (and/or deteriorate) quantification.

journal_name

Mol Imaging Biol

authors

Mansor S,Boellaard R,Huisman MC,van Berckel BN,Schuit RC,Windhorst AD,Lammertsma AA,van Velden FH

doi

10.1007/s11307-015-0921-x

subject

Has Abstract

pub_date

2016-08-01 00:00:00

pages

627-35

issue

4

eissn

1536-1632

issn

1860-2002

pii

10.1007/s11307-015-0921-x

journal_volume

18

pub_type

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