[MARMAM] Bottlenose Dolphin Thoracic CT

Marina Ivančić, DVM, DACVR marina.ivancic at nmmpfoundation.org
Tue Apr 22 23:07:16 PDT 2014

​Dear MARMAM colleagues,

We​ are pleased to announce a marine mammal diagnostic imaging publication
detailing thoracic CT in live bottlenose dolphins:

*Ivančić, M., Solano, M. and Smith, C. R. (2014), Computed Tomography and
Cross-Sectional Anatomy of the Thorax of the Live Bottlenose Dolphin
(Tursiops truncatus). Anat Rec, 297: 901–915. doi: 10.1002/ar.22900*

Pulmonary disease is one of the leading causes of cetacean morbidity and
mortality in the wild and in managed collections. The purpose of this study
was to present the computed tomographic (CT) appearance of the thorax of
the live bottlenose dolphin (*Tursiops truncatus*) out-of-water and to
describe the technical and logistical parameters involved in CT image
acquisition in this species. Six thoracic CT evaluations of four conscious
adult bottlenose dolphins were performed between April 2007 and May 2012.
Animals were trained to slide out of the water onto foam pads and were
transported in covered trucks to a human CT facility. Under light sedation,
animals were secured in sternal recumbency for acquisition of CT data.
Non-contrast helical images were obtained during an end-inspiratory breath
hold. Diagnostic, high quality images were obtained in all cases.
Respiratory motion was largely insignificant due to the species' apneustic
respiratory pattern. CT findings characteristic of this species include the
presence of a bronchus trachealis, absence of lung lobation, cranial
cervical extension of the lung, lack of conspicuity of intrathoracic lymph
nodes, and presence of retia mirabilia. Dorsoventral narrowing of the heart
relative to the thorax was seen in all animals and is suspected to be an
artifact of gravity loading. Diagnostic thoracic computed tomography of
live cetaceans is feasible and likely to prove clinically valuable. A
detailed series of cross-sectional reference images is provided. Anat Rec,
297:901–915, 2014. © 2014 Wiley Periodicals, Inc.


Best regards,

Marina Ivančić, DVM, DACVR
Veterinary Radiologist
National Marine Mammal Foundation
 Navy Marine Mammal Program
marina.ivancic at nmmf.org
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