PET in cancer screening: a controversial imaging

Malignancy has been one of the most dangerous threats to human health. Early diagnosis and treatment are key factors for improving prognosis. Cancer screening is an important way to detect early-stage cancer and precancerous lesion. PET has been used increasingly in cancer screening in accordance with the requirement of the public. Though a great number of data show that PET can find some subclinical malignancy, yet as a cancer screening modality, PET is still controversial in contemporary medical practice. The aim of this article is to review the application status and existing problem of PET in cancer screening, and to offer some recognition and view about cancer srceening.