CT protocol

No- for some studies we do a single phase acquisition and in some two or more phases. The different phases can potentially give more information than a single phase as well as to optimize lesion detectability. The phase usually refers to the time we acquire the scan data relative to IV contrast injection.

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Common phases of data acquisition

• Arterial phase- 25-30 sec after injection
• Venous phase- 55-60 sec after injection
• Delayed phase- 240-300 sec after injection