Novel assessment of retrospective on-demand analysis of venous thromboembolism by dual-layer spectral-detector CT.

Because the prognosis of pulmonary thromboembolism (PTE) will be often poor, early diagnosis and assessing severity at the first visit is important. A 76-year-old man with suspected venous thromboembolism and a contrast deficit in the pulmonary artery (PA) was revealed by contrast-enhanced computed tomography (CT) imaging by dual-layer spectral-detector CT (IQon Spectral CT®, Philips Healthcare, Best, The Netherlands). The lung perfusion image showed decreased perfusion in the culprit lesion. The dual-energy analysis of the virtual monoenergetic imaging showed clear visualization of deep vein thrombosis (DVT). In a 64-year-old man, an IQon Spectral CT® revealed a small contrast deficit in the PA. However, no perfusion abnormality was detected in the lung perfusion analysis. The IQon Spectral CT® enables the detection of lung perfusion abnormalities in addition to PTE. The IQon Spectral CT® imaging may be useful for the "one-stop shop" evaluation of PTE and DVT. <Learning objective: The prognosis of pulmonary thromboembolism (PTE) will be often poor, so early diagnosis and assessing severity at the first visit is important. The dual-layer spectral-detector computed tomography imaging for PTE, whereby the iodine map provided information regarding lung perfusion, whereas virtual monoenergetic images enabled clear visualization of deep vein thrombosis.>.