Fluid injection system with illuminated fluid reservoir

A fluid injection system comprising:

• an injector housing;
• a sleeve coupled to the injector housing, wherein the sleeve is configured to receive and secure a fluid reservoir, wherein the fluid reservoir further comprises a wiper that is proximally and distally movable within the interior of the fluid reservoir;
• a ram extending from the injector housing into the sleeve, the ram being configured to engage the wiper when the fluid reservoir is secured in the sleeve and to drive the wiper proximally and distally in accordance with instructions received from an injection controller coupled to the injector housing;
• a light source disposed on the injector housing proximate a distal end of the fluid reservoir relative to the wiper when the fluid reservoir is secured in the sleeve and the wiper is not extended, the light source configured to emit light into an interior of the fluid reservoir in a direction substantially parallel to a long axis of the fluid reservoir;
• and
• a diffusion element located between the light source and the fluid reservoir, wherein the light emitted by the light source passes through the diffusion element, and wherein the diffusion element is configured to diffuse the light emitted by the light source in order to illuminate the fluid reservoir, wherein the diffusion element comprises a substantially translucent material having a pattern of raised or lowered portions.