A thermal inkjet cartridge for an organic solvent-based ink includes a cartridge housing, a printhead attached to the housing, and a collapsible ink reservoir disposed in the housing. A tracer that is detectable, for example, by magnetic resonance imaging andor by X-ray computed tomography is co-infulsed with the therapeutic agent and used to monitor the distribution of the therapeutic agent as it moves through the target tissue. Then, a second end of the net is passed over the understructure of the bleachers and then operatively connected to a cable proximate an attachment point proximate the bottom of the bleachers.