Cover image supplied by Farhad Pashakhanloo and Natalia Trayanova (Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA), David Bluemke (National Institutes of Health Clinical Center, Bethesda, Maryland, USA), and Elliot McVeigh (University of California San Diego, La Jolla, California, USA). The picture shows detailed fibre tractography of the whole heart from a patient with atrial fibrillation. The image is reconstructed from in-vitro high-resolution diffusion tensor MRI obtained over 60 h of scan time. The tracts follow the local fibre orientation and reveal the myofibre architecture in both the atria and the ventricles.

Cover image supplied by Farhad Pashakhanloo and Natalia Trayanova (Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA), David Bluemke (National Institutes of Health Clinical Center, Bethesda, Maryland, USA), and Elliot McVeigh (University of California San Diego, La Jolla, California, USA). The picture shows detailed fibre tractography of the whole heart from a patient with atrial fibrillation. The image is reconstructed from in-vitro high-resolution diffusion tensor MRI obtained over 60 h of scan time. The tracts follow the local fibre orientation and reveal the myofibre architecture in both the atria and the ventricles.

Cover image supplied by Farhad Pashakhanloo and Natalia Trayanova (Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA), David Bluemke (National Institutes of Health Clinical Center, Bethesda, Maryland, USA), and Elliot McVeigh (University of California San Diego, La Jolla, California, USA). The picture shows detailed fibre tractography of the whole heart from a patient with atrial fibrillation. The image is reconstructed from in-vitro high-resolution diffusion tensor MRI obtained over 60 h of scan time. The tracts follow the local fibre orientation and reveal the myofibre architecture in both the atria and the ventricles.

Cover image supplied by Farhad Pashakhanloo and Natalia Trayanova (Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA), David Bluemke (National Institutes of Health Clinical Center, Bethesda, Maryland, USA), and Elliot McVeigh (University of California San Diego, La Jolla, California, USA). The picture shows detailed fibre tractography of the whole heart from a patient with atrial fibrillation. The image is reconstructed from in-vitro high-resolution diffusion tensor MRI obtained over 60 h of scan time. The tracts follow the local fibre orientation and reveal the myofibre architecture in both the atria and the ventricles.

Cover image supplied by Farhad Pashakhanloo and Natalia Trayanova (Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA), David Bluemke (National Institutes of Health Clinical Center, Bethesda, Maryland, USA), and Elliot McVeigh (University of California San Diego, La Jolla, California, USA). The picture shows detailed fibre tractography of the whole heart from a patient with atrial fibrillation. The image is reconstructed from in-vitro high-resolution diffusion tensor MRI obtained over 60 h of scan time. The tracts follow the local fibre orientation and reveal the myofibre architecture in both the atria and the ventricles.

Cover image supplied by Farhad Pashakhanloo and Natalia Trayanova (Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA), David Bluemke (National Institutes of Health Clinical Center, Bethesda, Maryland, USA), and Elliot McVeigh (University of California San Diego, La Jolla, California, USA). The picture shows detailed fibre tractography of the whole heart from a patient with atrial fibrillation. The image is reconstructed from in-vitro high-resolution diffusion tensor MRI obtained over 60 h of scan time. The tracts follow the local fibre orientation and reveal the myofibre architecture in both the atria and the ventricles.

Cover image supplied by Farhad Pashakhanloo and Natalia Trayanova (Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA), David Bluemke (National Institutes of Health Clinical Center, Bethesda, Maryland, USA), and Elliot McVeigh (University of California San Diego, La Jolla, California, USA). The picture shows detailed fibre tractography of the whole heart from a patient with atrial fibrillation. The image is reconstructed from in-vitro high-resolution diffusion tensor MRI obtained over 60 h of scan time. The tracts follow the local fibre orientation and reveal the myofibre architecture in both the atria and the ventricles.

Cover image supplied by Farhad Pashakhanloo and Natalia Trayanova (Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA), David Bluemke (National Institutes of Health Clinical Center, Bethesda, Maryland, USA), and Elliot McVeigh (University of California San Diego, La Jolla, California, USA). The picture shows detailed fibre tractography of the whole heart from a patient with atrial fibrillation. The image is reconstructed from in-vitro high-resolution diffusion tensor MRI obtained over 60 h of scan time. The tracts follow the local fibre orientation and reveal the myofibre architecture in both the atria and the ventricles.

Cover image supplied by Farhad Pashakhanloo and Natalia Trayanova (Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA), David Bluemke (National Institutes of Health Clinical Center, Bethesda, Maryland, USA), and Elliot McVeigh (University of California San Diego, La Jolla, California, USA). The picture shows detailed fibre tractography of the whole heart from a patient with atrial fibrillation. The image is reconstructed from in-vitro high-resolution diffusion tensor MRI obtained over 60 h of scan time. The tracts follow the local fibre orientation and reveal the myofibre architecture in both the atria and the ventricles.

Cover image supplied by Farhad Pashakhanloo and Natalia Trayanova (Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA), David Bluemke (National Institutes of Health Clinical Center, Bethesda, Maryland, USA), and Elliot McVeigh (University of California San Diego, La Jolla, California, USA). The picture shows detailed fibre tractography of the whole heart from a patient with atrial fibrillation. The image is reconstructed from in-vitro high-resolution diffusion tensor MRI obtained over 60 h of scan time. The tracts follow the local fibre orientation and reveal the myofibre architecture in both the atria and the ventricles.

Cover image supplied by Farhad Pashakhanloo and Natalia Trayanova (Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA), David Bluemke (National Institutes of Health Clinical Center, Bethesda, Maryland, USA), and Elliot McVeigh (University of California San Diego, La Jolla, California, USA). The picture shows detailed fibre tractography of the whole heart from a patient with atrial fibrillation. The image is reconstructed from in-vitro high-resolution diffusion tensor MRI obtained over 60 h of scan time. The tracts follow the local fibre orientation and reveal the myofibre architecture in both the atria and the ventricles.