The field of neurovisualization has been significantly reshaped by cutting-edge imaging technologies, notably high-field magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI). These innovations have made it possible to generate detailed connectomes through noninvasive, high-resolution mapping of neural connections. This chapter reviews key advancements in neurovisualization, focusing on MRI and DTI technologies and their applications in mapping neural architecture. A case study of the koala brain demonstrates how ultrahigh-field MRI and tractography can reveal conserved mammalian connectivity patterns, highlighting the evolutionary, biomedical, and translational relevance of these tools. We discuss methodological insights, limitations, and future directions in the context of both comparative neuroanatomy and human neuroscience.