The artifact is usually nonanatomic, poorly defined, and radiating. This type of artifact can occur in bony regions of the body in scans where contrast medium has been used and from lines, devices, and surgical clips. They occur because the portion of the beam that passes through one of the objects at certain tube positions is hardened less than when it passes through both objects at other tube positions. Similar artifacts arise from pacemaker leads, surgical clips, or similar structures.Ībstract = 'Imaging description In very heterogeneous cross sections, dark (low-attenuation) bands or streaks can appear between two dense objects in an image. These areas of decreased attenuation can be mistaken for intraluminal filling defects (Figure 84.1), or they could obscure the vessels for accurate assessment for pulmonary embolism. Importance Streak artifacts from dense contrast in the superior vena cava (SVC) are common, and can be seen overlying the right main and right upper lobe pulmonary arteries.

Imaging description In very heterogeneous cross sections, dark (low-attenuation) bands or streaks can appear between two dense objects in an image.

Streak artifact meaning