Purpose: Computed tomography angiography (CTA) is central to vascular diagnosis, but axial imaging can be difficult for junior clinicians to interpret. This study assessed whether animated three-dimensional volume rendering improves comprehension of vascular anatomy and diagnostic accuracy compared with CTA alone. Methodology: Twenty-two junior doctors and medical students completed an online questionnaire using two vascular cases: brachial artery pseudoaneurysm and carotid body tumour. Participants first reviewed axial CTA images and selected a diagnosis, then reviewed animated volume-rendered fly-by videos of the same pathology. The animations used layered rotational transitions to emphasise vascular anatomy, pathology and spatial relationships. Diagnostic accuracy was compared between modalities. Participants also rated anatomical understanding, spatial awareness, educational value and diagnostic confidence. Results: Animated visualisation increased mean diagnostic accuracy by 59 percentage points. For brachial artery pseudoaneurysm, accuracy increased from 14% with CTA to 86% after animation. For carotid body tumour, accuracy increased from 14% with CTA to 59% after animation. Diagnostic confidence improved in 43% of participants. Ninety-five per cent agreed that animated visualisation improved anatomical understanding, and all participants agreed that it improved spatial awareness and had educational value. Conclusion: Animated three-dimensional volume rendering improved diagnostic accuracy, anatomical comprehension and confidence among junior clinicians assessing vascular pathology. Integration of short volume-rendered animations into clinical teaching, case discussion and day-to-day vascular practice may help junior doctors understand complex vascular anatomy and pathology more effectively.