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Computed Tomography (CT or CAT Scan)

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Brain metastasis: A cross-section through a patient's brain after administration of intravenous contrast shows the contrast accumulating in the periphery of a cancerous deposit that has traveled to the brain, giving a characteristic ring-enhancing appearance.


Brain metastasis: A cross-section through a patient's brain after administration of intravenous contrast shows the contrast accumulating in the periphery of a cancerous deposit that has traveled to the brain, giving a characteristic ring-enhancing appearance.

A CT cross-section through a patient's brain shows an intraparenchymal hemorrhage (arrow), meaning blood within the substance of the brain. Also shown is a subarachnoid hemorrhage (arrowhead), or blood surrounding the surface of the brain; and edema (asterisk), or swelling of the brain.


A CT cross-section through a patient's brain shows an intraparenchymal hemorrhage (arrow), meaning blood within the substance of the brain. Also shown is a subarachnoid hemorrhage (arrowhead), or blood surrounding the surface of the brain; and edema (asterisk), or swelling of the brain.

Appendicitis: A CT cross-section through the patient's lower abdomen has also cut through the swollen, inflamed appendix in two places (arrows). Inflammation has spread to the nearby intra-abdominal fat (arrowhead).


Appendicitis: A CT cross-section through the patient's lower abdomen has also cut through the swollen, inflamed appendix in two places (arrows). Inflammation has spread to the nearby intra-abdominal fat (arrowhead).

A child being prepared for a CT scan.


A child being prepared for a CT scan.

A child being prepared for a CT scan.


A child being prepared for a CT scan.

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