Fig. 2
From: Integrating image fusion with nanoparticle contrast agents for diagnosis: a review
a MRI imaging system. b Alignment of protons without magnetic field. c Alignment of protons with magnetic field [7, 8]. d Shows the image acquisition of the SPECT system, where the gamma camera rotates about the patient to acquire a projection image at each angle. e With the PET imaging system, the patient is located within a ring of detectors and the positron annihilation emits two gamma photons in opposite direction which are picked up by two detectors [9]. f CT imaging system [10]. g Ultrasound imaging system [11]