Quantification of thin-section CT lung attenuation in acute pulmonary embolism: correlations with arterial blood gas levels and CT angiography

AJR. American Journal of Roentgenology
Shin MatsuokaYasuo Nakajima

Abstract

The purposes of this study were to investigate the frequency histogram of lung attenuation on CT angiography (CTA) in patients with and without acute pulmonary embolism (PE) and to evaluate the relation of the frequency histogram of lung attenuation and hypoxemia. Twenty-six patients with PE and 11 patients without PE who underwent CTA were evaluated with frequency histograms. We obtained quantitative parameters such as mean lung attenuation, median lung attenuation, SD, skewness, kurtosis, and the proportion of lung attenuation except for the median +/- 50 H (P +/- 50 H). Lung attenuation was also assessed visually and scored. The relationship between those histogram parameters, or visual score, and Pa(O2) was evaluated. CTA scores for evaluation of the degree of pulmonary artery obstruction were obtained, and the relation with Pa(O2) was assessed. No significant differences were found in mean lung attenuation and median lung attenuation between patients with and without PE. Meanwhile, SD, skewness, kurtosis, and P +/- 50 H were significantly different between patients with and without PE (p = 0.0003, 0.0071, 0.0047, and 0.0028, respectively) and significantly correlated with Pa(O2) (r = -0.770, 0.797, 0.786, -0.871, respectiv...Continue Reading

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Citations

May 25, 2011·Journal of Intensive Care Medicine·Peter S MarshallMark D Siegel
Oct 13, 2009·Journal of Computer Assisted Tomography·Hiromitsu SumikawaHironobu Nakamura
Jul 13, 2019·AJNR. American Journal of Neuroradiology·A EllerM M May
Dec 11, 2019·Journal of the American Heart Association·Ashley Knight-GreenfieldAjay Gupta
Jan 12, 2010·Canadian Association of Radiologists Journal = Journal L'Association Canadienne Des Radiologistes·Peter HowardR I Aviv
Jun 1, 2016·Canadian Association of Radiologists Journal = Journal L'Association Canadienne Des Radiologistes·Nick LougheedRavi Menezes

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