把阳性切缘从标本映射回术野Map positive margins from the specimen back to the surgical bed

头颈肿瘤切除后，标本进入病理流程，患者的创面则留在手术台上。如果病理发现某处切缘阳性，医生需要把标本上的这个位置准确找回到创面，决定从哪里追加切除。问题在于，标本离体后会旋转、收缩和变形，它已无法像一块拼图一样直接放回原位。After a head and neck tumor is removed, the specimen enters the pathology workflow while the wound remains on the operating table. If a margin is positive, the surgeon must find its counterpart on the wound and decide where to re-resect. Rotation, shrinkage, and deformation mean the specimen no longer fits back like an unchanged puzzle piece.

“靠近上缘”或“某个方向的一角”这样的口头描述，仍需要医生结合记忆、解剖特征和标本方向进行判断。头颈区域的神经、血管和重要外观结构相邻，追加切除既要对准可疑位置，也要谨慎保留周围组织。A verbal description such as “near the upper edge” still depends on the surgeon’s memory of anatomy and specimen orientation. In the head and neck, nerves, vessels, and structures important to appearance sit close together, so additional resection must target the suspected site while carefully preserving surrounding tissue.

系统保留三维标本及其切缘标注，通过轮廓约束形变和创面配准，将目标映射回患者一侧，并锚定在 AR 视野中。病理负责判断切缘，导航负责把这一判断所对应的空间位置传递回医生眼前。The system preserves a 3D specimen with margin annotations, then uses contour-constrained deformation and wound-bed registration to map targets back to the patient and anchor them in AR. Pathology determines margin status; navigation communicates the corresponding spatial location back to the surgeon.