Radiology In computed tomography (CT), the attenuation value are measured in Hounsefield units (HU). An attenuation value of ‘0’ (zero) HV corresponds to: A Water B Very dense bone structure C AIR D Fat 💡 Explanation In computed tomography (CT), the attenuation value are measured in Hounsefield units (HU). An attenuation value of '0' (zero) HV corresponds to: ✓ Correct Answer: A. Water