CT head without contrast is typically performed as an initial quick screening test to rule out acute findings, such as fracture, bleeding, or swelling. It can show tumors if large or causing mass effect on adjacent structures but may miss smaller or more subtle tumors. If high clinical concern for tumor, consider MRI brain with and without contrast. However, different clinical scenarios may require tailored approaches. For more info: https://acsearch.acr.org/docs/69486/Narrative/