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Cross‐Sectional Anatomy, Computed Tomography and Magnetic Resonance Imaging of the Thoracic Region of Common Dolphin (Delphinus delphis) and Striped Dolphin (Stenella coeruleoalba)

The aim of this study was to provide a detailed anatomical description of the thoracic region features in normal common (Delphinus delphis) and striped dolphins (Stenella coeruleoalba) and to compare anatomical cross‐sections with computed tomography (CT) and magnetic resonance imaging (MRI) scans. CT and MRI were used to scan 7 very fresh by‐caught dolphin cadavers: four common and three striped dolphins. Diagnostic images were obtained from dolphins in ventral recumbency, and after the examinations, six dolphins were frozen (−20°C) and sliced in the same position. As well as CT and MRI scans, cross‐sections were obtained in the three body planes: transverse (slices of 1 cm thickness), sagittal (5 cm thickness) and dorsal (5 cm thickness). Relevant anatomical features of the thoracic region were identified and labelled on each section, obtaining a complete bi‐dimensional atlas. Furthermore, we compared CT and MRI scans with anatomical cross‐sections, and results provided a complete reference guide for the interpretation of imaging studies of common and striped dolphin's thoracic structures.