 This is a non-randomized, open-label, multi-site study to evaluate the safety and efficacy of an intraoperative imaging system, the LUM Imaging System LUM015 imaging agent in conjunction with the LUM imaging device, in identifying residual cancer in the tumor bed of female breast cancer patients. During the study, study physicians and clinical staff will complete hands-on training in anticipation of the upcoming pivotal study. Site-specific or user-specific issues related to the use of the device will be identified and addressed. Additionally, the data collected in the study will be used to continue training the tumor detection algorithm of the device. 