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Systematic reviews on diagnostic test accuracy studies provide an overview of the current literature in a systematic and transparent manner. They are the highest level of evidence in clinical research, therefore they are critical to decision-making in the healthcare setting. Cancer is the primary source of mortality in Canada, however early detection of tumors can improve the survival rates and long-term health outcomes of patients. The primary method of cancer diagnosis is histopathological assessment, however, its use remains controversial. It is an invasive procedure and requires resources and clinical expertise not readily available. Noninvasive clinical imaging has been studied as a clinically desirable method for cancer diagnosis, however its diagnostic accuracy has yet to be established in the medical setting. With the increased role of DTA research in medicine, the current literature needs to be summarized in an effective way to properly educate and influence clinical decision-making. The objective of this thesis is to address the current evidence gaps in DTA research by conducting several systematic reviews to evaluate the accuracy of diagnostic methods in cancer-related imaging. The last chapter of the thesis will provide a critical reflection on the current landscape of DTA studies in cancer-related imaging, based on the findings of the reviews in the thesis.