Abstract: Some adjustable radiography template devices include a base member including one or more first radiopaque (RO) markers; an arm pivotally coupled to the base member; and a marker member slidably coupled to the arm and including a second RO marker. Some methods of using adjustable radiography template devices include locating a base member on a skin of a patient; locating a marker member of on the skin of the patient; and while a second RO marker is aligned with a puncture site of the blood vessel, marking a location of the second RO marker on the skin of the patient.