Contents 1. Introduction
The detection and resection of brain tumors is one of the main challenges in brain surgery. The brain tumors do not exhibit a clear boundary separating them from the adjacent normal brain tissues [1]. Conventional imaging techniques such as CT and MRI are typically employed to locate the cancer regions prior to the surgery. However, in operation, surgeons experience difficulty to locate the cancerous regions because of the discrepancies between the MRI/CT images and visual inspection. [2] Therefore, in situ imaging techniques that can provide a clear visualization of cancerous tissues during the operation would significantly help the current brain diagnosis and surgery.
