Abstract: The present invention refers to a Mobile Molecular Imaging System, for example a PET (positron emission tomography) or SPECT (single photon emission computerized tomography) device, comprising: at least one group of n detector modules conforming detector module sets with a rounded shape comprising m detector modules each, being m<n and said detector module sets being separable from each other, first means to carry out the movement for separating the detector module sets in the transaxial plane second means to carry out a rotation movement of the Imaging System a Vertical Actuator that allows the axial movement of the Imaging System. and also refers to an Interventional System comprising the Mobile Molecular Imaging System and use of any of them in medical procedures, such as biopsy, radiotherapy, radiofrequency or ultrasound, among others.