The usefulness of calculated attenuation correction in the evaluation of metallic artifacts on brain PET/CT Imaging

被引：1

作者：

Almodovar, Samuel ^{[1
]}

White, Sharon L. ^{[1
]}

Modarresifar, Homayoun ^{[1
]}

Ojha, Buddhiwardhan C. ^{[1
]}

机构：

[1] Univ Alabama Birmingham, Birmingham Med Ctr, Dept Radiol, Div Nucl Med, Birmingham, AL 35249 USA

来源：

CLINICAL NUCLEAR MEDICINE | 2006年 / 31卷 / 09期

关键词：

attenuation correction; brain; PET; PET/CT; artifact;

D O I：

10.1097/01.rlu.0000233348.84473.4c

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

A known limitation of CT-based attenuation correction (CTAC) is the creation of artifacts that mimic increased FDG uptake in the location of metallic prostheses. Calculated attenuation correction (CAC) uses a constant value for the attenuation coefficient of brain tissue at 511 keV and corrects the reconstructed data for attenuation effects. Comparison of CTAC and NAC PET images should always be the first step when evaluating possible metallic artifacts on CTAC PET brain images. If the etiology responsible for the increased FDG uptake remains unclear, reprocessing using CAC is an additional useful tool to differentiate between artifactual and true FDG uptake. Copyright © 2006 by Lippincott Williams & Wilkins.

引用

页码：554 / 555

页数：2

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