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A fast intracerebral hemorrhage volume estimation tool based on the ABC/2 formula to assist clinical decision-making.
Enter CT measurement data to calculate volume.
Tada Formula: V = 0.5 × L × S × H. Where L is the longest diameter, S is the widest diameter, and H is the height (number of slices × slice thickness). This formula is widely used clinically to estimate intracerebral hemorrhage volume.
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When a patient presents with an intracerebral hemorrhage (ICH), quickly and accurately estimating the hemorrhage volume is crucial for clinical decision-making. This tool uses the ABC/2 formula (length × width × height ÷ 2). By entering three perpendicular diameter values measured from a CT or MRI scan, it automatically calculates the hemorrhage volume in milliliters (mL). This method is particularly suitable for the rapid assessment of supratentorial intraparenchymal hemorrhages.
What types of brain hemorrhages is the ABC/2 formula suitable for?
It is primarily used for supratentorial intraparenchymal hemorrhages. It should be used with caution for intraventricular hemorrhages and subarachnoid hemorrhages.
What is the acceptable range for measurement error?
Clinical guidelines suggest keeping it within ±5%. The key is to ensure the three diameters are perpendicular to each other and represent the maximum values.
The input range is limited to 0.1-50 cm; exceeding this will trigger an error prompt. The results are for clinical reference only, and actual treatment decisions must incorporate other clinical assessments. For multifocal hemorrhages, it is recommended to calculate the volume for each area separately.
Typical example: Length 4 cm × Width 3 cm × Height 5 cm = 30 mL (4 × 3 × 5 ÷ 2). For irregularly shaped hematomas, consider using the Tada formula as a supplementary calculation. It is recommended to use the caliper tool on your imaging workstation for measurements.
