Radiological apparatus for medical purposes; nuclear medicine diagnostic imaging apparatus; radiological apparatus for use in calibration and quality control of nuclear medicine imaging instruments, namely, gamma cameras, dose calibrators, well counters; medical apparatus and instruments for use in positron emission tomography (PET) imaging; medical apparatus and instruments for use in positron emission tomography (PET) imaging used to monitor brain, heart and metabolic functions; medical equipment, namely, computed tomography (CT) apparatus; computer controlled automatic injection system for injecting medical fluids during the process of diagnosis of a condition in an individual or during computed tomography (CT) procedures; radiological apparatus for medical purposes, namely, flood sources, dose calibrator sources, rod sources, spot makers, pen point markers; radiological apparatus for medical purposes, namely, reference radiation sources for use in calibration of medical imaging instruments; radiological apparatus for medical purposes, namely, radiation sources for use in assessment of the quality and homogeneity of imagine in nuclear medical imaging instruments; radiological apparatus for medical purposes, namely, radiation sources for use in calibration and assessment of image quality and homogeneity of nuclear medicine imaging instruments, including gamma cameras; radiological apparatus for medical purposes, namely, radiation sources used in the testing of response uniformity of medical imaging instruments