NeuroVault List Collection Images

List all statistical map images in a specific NeuroVault collection. Returns image metadata including name, map type (T map, Z map, F map, etc.), cognitive paradigm/contrast annotations, and file download URLs. Use this to explore what brain maps are available in a study collection before downloading. Example: collection 457 (Human Connectome Project) has 48 images covering emotion, gambling, language, motor, relational, social, and working memory tasks.