[Pitfall in the interpretation of head CT and CT angiography]

With the continuous increase in the volume of clinical imaging data continues to increase, there is an increasing demand for efficient and the capable people who can make accurate diagnosis on the basis of imaging findings. In general, errors in the interpretation of routine brain imaging, which is used as a screening tool, can be categorized as either perceptual or cognitive. Minimizing errors in the image interpretation is extremely essential for superior diagnostic and patient care. While performing head CT, it is important to consider the anatomical site and imaging aspects that may lead to false-positive and true-negative interpretation. In this manuscript, we discuss and present example of the various pitfalls of interpreting head CT images. With the knowledge of the process of image interpretation process, it is important to evaluate symmetrical findings such as brain edema, the median site such as the para-sellar region, the superior and inferior border images, and beam hardening artifact of the posterior fossa. In addition, CT angiography is being widely used as diagnostic tool for the cerebrovascular disease such as intracranial aneurysm. In this manuscript, we discuss the precaution that should be taken during the diagnosis of intracranial aneurysm with CT angiography findings.