Radiographic evaluation of cardiac silhouette using vertebral heart size method in squirrel monkey (Saimiri sciureus)

Area of Science:

• Veterinary Radiology
• Primate Research
• Comparative Cardiology

Background:

• The squirrel monkey (Saimiri sciureus) is a significant model in biomedical research due to its availability and physiological similarities to humans.
• Understanding normal anatomical parameters is crucial for accurate health assessments in research subjects.

Purpose of the Study:

• To establish the average vertebral heart size (VHS) in healthy squirrel monkeys (Saimiri sciureus).
• To validate and apply the Buchanan & Bücheler method for VHS measurement in this primate species.
• To provide a species-specific reference value for cardiac evaluation in Saimiri sciureus.

Main Methods:

• Radiographic examinations were performed on healthy Saimiri sciureus.
• Standard radiographic projections including laterolateral left (LLL), laterolateral right (LLR), ventrodorsal (VD), and dorsoventral (DV) were utilized.
• The vertebral heart size (VHS) was measured using the method proposed by Buchanan & Bücheler.

Main Results:

• No statistically significant differences were found between LLL and LLR projections.
• No statistically significant differences were observed between VD and DV projections.
• No statistically significant differences in VHS were detected between male and female subjects, allowing combined analysis.

Conclusions:

• The study successfully determined species-specific vertebral heart size (VHS) values for Saimiri sciureus.
• The established VHS values serve as a critical reference for assessing cardiac health in squirrel monkeys.
• This research contributes to the standardization of diagnostic imaging in non-human primate research.