This research involves the use of a terahertz imaging and spectroscopy system to conduct spectrometry on excised breast tissue. Breast cancer lumpectomy is the process of removing a malignant tumor from breast tissue. During the procedure, a portion of the surrounding tissue, known as the margins, is also removed. The margin tissue undergoes examination by a pathologist in order to determine whether there are any cancerous cells remaining in the healthy tissue. Should any additional cancerous tissue be found in the margin, it is considered a positive margin and an additional surgery is required to remove the remaining cancerous tissue.