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Fig. 3 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 3

From: Closed versus conventional IV catheter in performing coronary CT Angiography

Fig. 3

a CCTA scan of a 44-year-old male, with atypical chest pain using conventional IV catheter 18 G. Axial image showing vessel attenuation at the region of interest (ROI) in the lumen of the left main coronary artery about 420 HU. b Comparative image of the same patient with follows up CCTA scan using the new closed IV Catheter 22 G with the same protocol. Axial image showing vessel attenuation at the ROI in the lumen of the same left main coronary artery was higher about 450 HU

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