In vivo imaging is a scientific technique that involves visualizing biological processes within living organisms using various imaging methods. This field of research allows researchers to study the internal workings of living organisms in real-time, providing insights into organ function, disease progression, and treatment effectiveness. In vivo imaging techniques include but are not limited to magnetic resonance imaging (MRI), positron emission tomography (PET), computed tomography (CT), and fluorescence imaging. These techniques have revolutionized the study of biology and medicine by allowing scientists to observe processes within living organisms without the need for invasive procedures.