 To the investigators knowledge, no prospective studies comparing octreodite analogue based PETCT imaging with standard diagnostic procedures have been published until now. PETCT offers a clear advantage over scintigraphy in terms of sensitivity and resolution which should be helpful in determining the SST status of various histologic forms of lymphomas The investigators hypothesize that a positive 68Ga-DOTANOC PETCT scan correlates with the overexpression of all or some SST subtypes in lymphomas, which is possibly linked to a more indolent behavior of the disease. Furthermore, it is hypothesized that 68Ga-DOTANOC PETCT imaging provides a valid method to select patients with lymphoma for radionuclide therapy with 177Lu-DOTATATE. Third, differential diagnosis with NETs may also improve after receiving information on SST status in lymphomas. Thus findings in this study may be useful not only for biologic characterization but also for diagnosis and management of these heterogenous diseases originating in the lymphatic system 