PunctVR: VR Training for Image-Guided Needle Puncture with a Scaffolded, Self-Directed Framework. - Wenqing Liu; Chen Liu; Jiaqi Wang; Yan Zhang 101; Hangyu Zhou; Zixuan Guo 003; Aixi Guo; Ziang Qi; Jiannan Ye; Yu Zhang; Qishan Tong; Xubo Yang (IEEE Trans. Vis. Comput. Graph., 2026)