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Abstract #1382

Simulated 1H-1H residual dipolar couplings of collagen-associated water

Jouni Karjalainen1, Mikko J. Nissi2, Miika T. Nieminen1,3,4, and Matti Hanni1,3,4

1Research Unit of Medical Imaging, Physics and Technology, University of Oulu, Oulu, Finland, 2Department of Applied Physics, University of Eastern Finland, Kuopio, Finland, 3Medical Research Center, University of Oulu and Oulu University Hospital, Oulu, Finland, 4Department of Diagnostic Radiology, Oulu University Hospital, Oulu, Finland

Residual dipolar couplings have been suggested as the cause of the orientational dependence of relaxation times in anisotropic tissues, such as articular cartilage. We use molecular dynamics simulations to compute the residual dipolar couplings of water protons associated with a model collagen molecule. The results suggest that significant residual dipolar couplings appear without strong binding between the water and the collagen.

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