PMC9612951_01
Chest computed tomography (CT) showing bilateral consolidating and infiltrative, peripheral ground-glass opacities, characteristic of coronavirus disease 2019 (COVID-19).
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CT of the aorta was performed from the thoracic region to the lower branches, with both noncontrast and contrast imaging. Chest CT showed multiple peripheral ground-glass lung opacities with bilateral infiltration, characteristic of COVID-19 pneumonia. (Fig. 1).
(a) Conventional CT images did not identify areas of high intensity within the arteries in the imaged area; however, electron density imaging clearly identified areas of high intensity (b). The electron density of the right external iliac artery, which showed a high intensity area (yellow arrowheads), was 106.2% of the electron density of water (EDW), while the electron density of the normal left femoral artery was 104.9% of the EDW. Spectral CT number in the right external iliac artery and left external iliac artery were 66.3 HU and 54.2 HU, respectively. Contrast CT showing no contrast effect in the areas of high intensity seen on electron density images (c).
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There were no abnormal findings within the aorta or its branches on conventional CT images (Fig. 2a).