It provides elaborated info concerning molecular structure, dynamic processes and permits the direct observation of chemical reactions. it's conjointly a primary quantitative methodology permitting the determination of concentration of molecules even in advanced mixtures. additionally, to the well-known observation of chemical element, carbon, range and phosphoric it is often used on an oversized number of alternative components. Molecular Imaging (MI) could be a growing medical specialty analysis discipline that allows the visual image, characterization, and quantification of life processes going down at the cellular and subcellular levels at intervals intact living subjects, together with patients. MI pictures depict cellular and molecular pathways and mechanisms of malady gift within the context of the living subject. Study of life processes in their own physiologically authentic surroundings is expedited - MI transcends the wants for and limitations of in vitro or ex vivo biopsy/cell culture laboratory techniques. It conjointly encompasses 'multiple' image-capture techniques together with merging information areas from the fields of cell/molecular biology, chemistry, Materia medica, medical physics, biomathematics, and bioinformatics.