Emerging spectroscopic techniques for prostate cancer diagnosis

Over the past several decades, large efforts have been made to diagnose and overcome prostate cancer. Among all screening methods, the measurement of prostate-specific antigen (PSA) threshold has been stood out and contributed to diagnose prostate cancer (PCa) in a large number of men. Nevertheless, the early detection of prostate carcinoma and its focal imaging is remaining crucial to diminish the elevated number of PCa-related deaths. Because of the multifocal behavior of PCa development, a whole gland ablation has been practiced during previous years. Furthermore, there is an evidence of the likelihood of high-risk PCa that proves once again the importance of early diagnosis and accurate staging of the disease. So far, numerous advanced spectroscopic methods with different approaches have been reported as the alternative tools to conventional techniques of PCa diagnosis and imaging. In this review, we introduce innovative emerging techniques utilizing spectroscopic methods such as photoluminescence, surface-enhanced Raman spectroscopy, and surface plasmon resonance to measure the ultralow level of PSA. In addition, we review novel and alternative approaches of diagnosis such as imaging methods through photoluminescence, magnetic resonance imaging, and positron emission tomography.

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