Myocardial T1ρ-mapping in small animal studies is still a challenging procedure. Commonly, T1ρ-mapping requires long measurement times or only provides insufficient image quality due to a low signal-to-noise-ratio. Using a novel approach based on an optimized radial sampling pattern and high flip angles, we were able to overcome both restrictions. By a special sorting of golden angles based on Bloch simulations the image quality of the method could be significantly increased, and a high quantification accuracy could be realized. Thus, the new approach is a reliable method for fast T1ρ-mapping in future studies on small animals.