Front load pressure jacket system with syringe holder

Fluid injection apparatus comprising:

• an injector head having a housing and a front opening in said housing for connection to a rear end of a syringe, drive means extendible through said opening and an opening in said rear end of the syringe for imparting motive force to a plunger disposed in the syringe;
• and
• a pressure jacket including first and second jacket halves having interior surfaces conformable to portions of an exterior surface of said syringe, a hinge pin extending from a front face of said injector head, at least one of said first and second jacket halves rotatably mounted on said hinge pin and articulable between an open position allowing insertion and removal of said syringe, and a closed position wherein said jacket substantially surrounds said syringe.