In vivo quantification of T1, T2, and apparent diffusion coefficient in the mouse retina at 11.74T. |
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Authors: | Junjie Chen Qing Wang Huiying Zhang Xiaoxia Yang Jian Wang Bruce A Berkowitz Samuel A Wickline Sheng-Kwei Song |
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Affiliation: | Department of Medicine, Washington University, St. Louis, Missouri, USA. |
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Abstract: | MRI has recently been used for noninvasive examination of retinal structure and function in rats and cats. However, the advantages of quantitative high-resolution MRI of retina from mice have not yet been explored. In the present study, T(1) and T(2) relaxation time constants and the directional apparent diffusion coefficient (ADC) in the retina of C57/BL6 mice were measured. Three MR-detected retina layers and a MR-detected choroid layer were observed on both T(1)- and T(2)-weighted images at an image resolution of 47 x 47 x 400 microm(3). The significantly higher ADC parallel to than that perpendicular to the optic nerve in the MR-detected outer retina layer at the central retina reflects the known cellular organization of the photoreceptor cells. This study establishes, for the first time, normative metrics of T(1), T(2), and ADC of the mouse retina. These MR parameters are expected to be useful in future evaluation of developmental and pathological alterations of retinal cell layers in mice. |
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Keywords: | retina mice T1 relaxation time constant T2 relaxation time constant apparent diffusion coefficient MRI |
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