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Sawada Y, Kaneko A, Morimoto M, Suzuki J, Pai C, Nakayama S, Ageyama N, Koie H, Miyabe-Nishiwaki T. The effect of different body positions on the cardiothoracic ratios obtained by chest radiography in Japanese macaques (Macaca fuscata) AND RHESUS MACAQUES (Macaca mulatta). J Med Primatol 2022; 51:345-354. [PMID: 35808827 DOI: 10.1111/jmp.12603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 06/16/2022] [Accepted: 06/22/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Although some studies have reported cardiac diseases in macaques, an adequate screening method for cardiac enlargement has not yet been established. This study aimed to evaluate the positioning of macaques for radiographs and establish reference intervals for the cardiothoracic ratio (CTR). MATERIALS AND METHODS We developed a device for chest radiography in the sitting position and performed chest radiography in 50 Japanese and 48 rhesus macaques to evaluate the CTR and chest cavity size. RESULTS In Japanese and rhesus macaques, the thorax height was significantly larger, the heart width was significantly smaller, and the mean CTR was significantly smaller in the sitting position than in the prone position. The reference intervals for CTR in the sitting position were 51.6 ± 4.6% and 52.2 ± 5.1% in Japanese and rhesus macaques, respectively. CONCLUSION Thoracic radiographic images obtained in a sitting position resulted in a smaller CTR and a larger thorax height, which could be useful for detecting pulmonary and cardiac abnormalities.
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Affiliation(s)
- Yuto Sawada
- Center of Human Evolution Modelling Research, Primate Research Institute, Kyoto University, Inuyama, Japan.,Laboratory of Laboratory Animal Science, Azabu University, School of Veterinary Medicine, Sagamihara, Japan
| | - Akihisa Kaneko
- Center of Human Evolution Modelling Research, Primate Research Institute, Kyoto University, Inuyama, Japan.,Center for the Evolutionary Origins of Human Behavior (EHUB), Kyoto University, Inuyama, Japan
| | - Mayumi Morimoto
- Center of Human Evolution Modelling Research, Primate Research Institute, Kyoto University, Inuyama, Japan.,Center for the Evolutionary Origins of Human Behavior (EHUB), Kyoto University, Inuyama, Japan
| | - Juri Suzuki
- Center of Human Evolution Modelling Research, Primate Research Institute, Kyoto University, Inuyama, Japan
| | - Chungyu Pai
- College of Bioresource Science, Nihon University, Fujisawa, Japan
| | - Shunya Nakayama
- College of Bioresource Science, Nihon University, Fujisawa, Japan
| | - Naohide Ageyama
- Tsukuba Primate Research Center, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Japan
| | - Hiroshi Koie
- College of Bioresource Science, Nihon University, Fujisawa, Japan
| | - Takako Miyabe-Nishiwaki
- Center of Human Evolution Modelling Research, Primate Research Institute, Kyoto University, Inuyama, Japan.,Center for the Evolutionary Origins of Human Behavior (EHUB), Kyoto University, Inuyama, Japan
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