Weight Based CT Dose Planning Guide
Computed tomography contrast planning depends on patient size, scan purpose, injector settings, and local radiology policy. A weight based calculator helps teams prepare a starting volume before the order is checked. It does not replace the protocol book. It supports cleaner documentation and faster review.
Why Weight Matters
A small patient usually needs less contrast than a large patient. A simple mL per kilogram factor gives a practical estimate. The calculator first converts pounds to kilograms when needed. It then multiplies weight by the chosen factor. This keeps the method clear and repeatable.
Dose Caps and Rounding
Most protocols use a maximum volume. A cap helps prevent unnecessary contrast load. The tool applies the cap after the first estimate. It can also apply a minimum volume when your local protocol requires it. Rounding helps match available syringe marks, injector presets, and pharmacy preparation steps.
Iodine Load Review
CT contrast products often list iodine concentration in milligrams per milliliter. Multiplying final volume by concentration gives total iodine load. Dividing iodine load by weight gives iodine per kilogram. These values help compare protocol choices. They also help staff explain why one setting creates a larger exposure than another.
Safety Notes
Kidney function, hydration, allergy history, pregnancy status, metformin use, and prior reactions can change the plan. This page highlights some risk signals. It cannot decide whether contrast is appropriate. That decision belongs to licensed imaging staff and the ordering clinician.
Better Workflow
The export buttons save the calculation. CSV is useful for spreadsheets. PDF is useful for chart review or protocol checking. The example table shows typical entries. Replace those examples with local approved values before using the page in a real department.
Validation and Records
Before deployment, compare this output with sample cases from your radiology protocol. Test light, average, and heavy weights. Test low and high caps. Confirm rounding rules with technologists. Keep a version note whenever formulas change. Store exports only according to privacy rules. Remove patient identifiers when they are not required. Regular review keeps the calculator useful, consistent, and safer for everyday CT planning. It also reduces avoidable transcription mistakes later.