Conclusion：Digital subtraction dacryocystography is a rapid，effective and noninvasive imaging technique，and it is helpful in the diagnosis，treatment and study of lacrimal duct obstruction.
Conclusion：Digital subtraction dacryocystography is a rapid，effective and noninvasive imaging technique，and it is helpful in the diagnosis，treatment and study of lacrimal duct obstruction.
结论：数字减影泪道造影术是一种快速、有效和无损伤的检查方法，在泪道阻塞的诊断和治疗中将起重要作用。