Fig. 2

Head dual-energy computed tomography scan shows focal hyperattenuation in the pons, classified as indeterminate at standard grayscale series (a). This 58-year-old patient had a history of hypertension and diabetes and presented to the emergency department with right arm tremor, blurry vision, and increased systolic blood pressure. On the calcium-overlay image, the focal hyperattenuation in the pons was not apparent (b). On the virtual non-calcium image (c), the focal hyperattenuation in the pons manifests as a focal area of high attenuation, compatible with hemorrhage. From Hu et al. [17]