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This study aimed to evaluate the effect of pulmonary arteriovenous computed tomography (CT) value and CT value difference on the pulmonary arteriovenous automatic extraction ability of a medical workstation. We classified patients who previously underwent contrast-enhanced CT as those with a pulmonary arteriovenous CT value difference of &lt;50 Hounsfield unit (HU) and ≥100 HU. The groups were further divided into four subgroups each, with a total of eight groups, based on low pulmonary arteriovenous CT values of 200 or more and &lt;250 HU, 250 or more and &lt;300 HU, 300 or more and &lt;350 HU, and 350 HU or more. A radiographer conducted a visual evaluation, and we judged whether it could extract pulmonary arteries A1-A10 and pulmonary veins V1-V10 without errors. When the CT value difference was &lt;50 HU, the low pulmonary arteriovenous CT value of 200 or more and &lt;250 HU significantly decreased the extraction ability compared with the ≥350 HU group (p&lt;0.05), but when the CT value difference was ≥100 HU, no difference in the CT value was found. The pulmonary arteriovenous CT value and CT value difference affect the pulmonary arteriovenous automatic extraction ability of the medical workstation, but revision by the creator is necessary because misrecognition is included even if a CT value and CT value difference is high.

Effect of CT Value and CT Value Difference on the Pulmonary Arteriovenous Automatic Extraction Function of the Medical Workstation