Table C.7.
Representative cases for identified failure mode in LiVU dataset. All images are displayed using window [−150, 150] HU. FOV=Field-of-view. BC=Body Composition. SAT=Subcutaneous Adipose Tissue.
| Failure Mode | Explanation | Input | FOV Extended | BC Segmentation |
|---|---|---|---|---|
| Body Positioning | Non-standard body positioning with arms in FOV, resulting in addition area measured comparing to normal positioning. |
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| Cupping Artifact | The increased intensity at the FOV border causing shift from standard HU. The method cannot mitigate this artifact, resulting in inaccurate BC segmentation. |
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| Intravenous Contrast | Typical observed failure pattern associated with contrasted scans. Parts of muscle and SAT are missing in the segmentation mask. |
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| Pleural Effusion | The segmentation module failed to distinguish the high intensity region in the lung (pleural effusion) from the muscle tissue. |
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| Beam Hardening Artifact | Severe imaging noise and beam hardening artifact associated with metal implant, resulting in inaccurate BC segmentation. |
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