Detecting thin bones and modeling cod skeleton

Fish bones in fillets can be serious problem both to the consumer and to the processing company. Filets with bones are likely to reduce the consumption especially in traditionally weak fish consumption areas. Fish bones can be dangerous leading to wounds in the human digestion tract. Fish, such as cod, have fine structured skeleton and the bone density is lower than that of man. Five cods where scanned with a normal hospital computer tomography (CT) scanner. Their skeletons were segmented out of the data set and a model reconstructed. The model is evaluated by visual inspection and compared to the cod to see what is missing from the skeleton. The density of the bones and otoliths is measured. The results show an almost complete skeleton with thin bones compared to the pixel size of image and with bones that are considerably lower in density than trabecular human bones.