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Hounsfield unit

1 byte removed, 16:43, 12 August 2021
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<math>HU = \frac{(μ_{{material}} - μ_{{water}})} {μ_{{water}}} \cdot 1000</math>
 
where μ is the effective linear attenuation coefficient of the measured material relative to water for the x-ray beam used. The scale is defined so that under standard conditions water has a value of 0 HU and air has a value of -1000 HU.