visualization rate of lymphatic vessels significantly increased by 18.5% （to 70.4%，P=0.016）， and the visualization range expanded by 196.8%，138.2%， and 84.4% immediately，5 minutes， and 15 minutes after contrast injection， respectively （all P<0.001）， suggesting improved structural integrity and active drainage capacity of lymphatic vessels. Meanwhile， the circumference difference rate and water difference rate of the affected limb decreased by 69.1% and 66.6%， respectively （all P<0.001）， showing a biphasic pattern： "rapid reduction of fluid accumulation in the early stage （Weeks 1-2） and a platform period of lymphatic function remodeling in the later stage （Weeks 3-4）". This confirms the sequential effect of CDT， which first relieves tissue edema and then promotes the reconstruction of lymphatic circulation homeostasis. Conclusion CDT improves stage Ⅲ BCRL through a dual mechanism： on the one hand， it accelerates the clearance of interstitial fluid to reduce edema load； on the other hand， it promotes the repair of lymphatic vessel structure and enhancement of function （e.g.，increased visualization rate and expanded drainage range）， presenting compensatory drainage pathways. Ultimately， it achieves the synergistic improvement of the structure and function of the lymphatic system. ICG lymphography can dynamically capture this remodeling process， providing visual evidence for clarifying the therapeutic mechanism of CDT， and guiding the implementation of precision CDT， highlighting its important value in studying lymphatic circulation regulation.