Radiological profile of anemia on unenhanced MDCT of the thorax View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2008-04-02

AUTHORS

Ehab M. Kamel, Elena Rizzo, Michel A. Duchosal, Rafael Duran, Vasco Goncalves-Matoso, Pierre Schnyder, Salah D. Qanadli

ABSTRACT

Our aim was to investigate the diagnostic value of unenhanced MDCT in anemic patients. Fifty consecutive patients with proven anemia and 50 nonanemic matched group for age, sex and body mass index were evaluated. In either group, hemoglobin levels were assessed no more than 24 h from an unenhanced CT of the thorax. For each patient, the presence of a hyperattenuating aortic wall (aortic ring sign) and/or dense interventricular septum (subjective parameters) were identified by two radiologists who were blinded to the laboratory findings. Furthermore, the aortic CT attenuation values (objective parameter) were also obtained and correlated with the hemoglobin levels. The sensitivity and specificity in detecting anemia were calculated for each variable, and ROC analysis was generated for subjective and objective parameters. Subjective image analysis revealed that the aortic ring sign was more sensitive than the interventricular septum sign for anemia detection (84% vs. 72%), whereas this latter sign was more specific (100% vs. 92%). A good correlation (r = 0.60) was observed between the aortic CT attenuation values and the hemoglobin levels in the whole study population. Using a threshold of ≤35 HU for anemia diagnosis, the sensitivity and specificity of aortic CT attenuation value were 84% and 94%, respectively, with the largest area under the curve (0.89) among all diagnostic criteria. However, the best trade-off between sensitivity (80%) and specificity (100%) was obtained from combining both subjective and objective analysis. Interpreting anemia upon unnenhanced MDCT of the thorax is quite feasible. A diagnostic approach that considers both subjective and objective analysis offers the best trade-off between sensitivity and specificity. More... »

PAGES

1863-1868

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00330-008-0950-9

DOI

http://dx.doi.org/10.1007/s00330-008-0950-9

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1010750041

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/18386013


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