Cancer imaging plays a pivotal role in the diagnosis, staging, and treatment monitoring of various malignancies. Imaging techniques such as X-ray, Computed Tomography (CT), Magnetic Resonance Imaging (MRI), Positron Emission Tomography (PET), and ultrasound are commonly used in this field. X-ray imaging offers a quick and cost-effective method for detecting tumors in certain anatomical locations. CT scans provide detailed cross-sectional images useful for tumor localization and assessment of metastasis. MRI due to its superior soft tissue contrast, aids in delineating tumor boundaries and evaluating surrounding structures. PET imaging, often combined with CT or MRI, enables functional assessment of tumors through the detection of metabolic activity using radiotracers. Emerging technologies like optical imaging and nanoparticle-based approaches have enhanced cancer detection and improved therapeutic outcomes. This book explores all the important aspects of cancer imaging in the present day scenario. It aims to shed light on some of the unexplored aspects of cancer imaging and the recent researches in this field. Those with an interest in cancer imaging would find this book helpful.