Table 2. MR safety information of commonly used metallic stents. Information is summarized from http://www.mrisafety.com (reproduced from Dr. Frank G. Shellock with permission) and the official websites of stent companies.

Manufacturer	Object	Material	MRI Status	Field strength
Johnson & Johnson Interventional (USA)	Palmaz stent	Stainless steel	Undetermined	–
Cook Medical (USA)	Cook-Z stent, Gianturco-Rosch, Tracheobronchial Design	Stainless steel	Conditional 5	1.5
Huaian Sigma Medical (China)	Sigma stent	Silicone, stainless steel	Undetermined	–
Boston Scientific (USA)	Dynamic (Y) stent, Bifurcated Tracheobronchial stent	Stainless steel	Unsafe	–
Merit Medical (USA)	AERO Tracheobronchial stent	Nitinol	Conditional 6	3
Schneider (USA)	Tracheobronchial Wallstent, Endoprosthesis, 14×80	Elgiloy	Safe	1.5
	Tracheobronchial Wallstent, Endoprosthesis, 24×70
Boston Scientific (USA)	Ultraflex Tracheobronchial stent	Nitinol	Conditional 5	1.5, 3
Novatech (France)	SILMET stent	Nitinol	Undetermined	–
Leufen Medical (Germany)	Leufen stent	Nitinol	Undetermined	–
MICRO-TECH (China)	MICRO-TECH Tracheal stents/Bronchial stents	Nitinol	Conditional 8	1.5, 3
	MICRO-TECH Y-Tracheal stents
	MICRO-TECH J-Tracheal stents
	MICRO-TECH Bronchial Stump Fistula-occluding stents