Radiological Society of North America (RSNA) 3D printing Special Interest Group (SIG): guidelines for medical 3D printing and appropriateness for clinical scenarios oleh Leonid Chepelev, Nicole Wake, Justin Ryan, Waleed Althobaity, Ashish Gupta, Elsa Arribas, Lumarie Santiago, David H Ballard, Kenneth C Wang, William Weadock, Ciprian N Ionita, Dimitrios Mitsouras, Jonathan Morris, Jane Matsumoto, Andy Christensen, Peter Liacouras, Frank J Rybicki, Adnan Sheikh, RSNA Special Interest Group for 3D Printing