[Imaging of secondary pulmonary changes in central bronchial carcinomas by F-18-FDG PET].

Aim: The presented study was performed in order to evaluate the potential interference of secondary pulmonary changes (dystelectasis, retention pneumonia) with bronchial carcinomas in F-18-FDG-PET.

Method: A retrospective analysis of F-18-FDG-findings in 33 patients with bronchial carcinoma (staging) was performed. Seven out of fourteen patients with central tumor localisation had secondary pulmonary changes (thorax-x-ray, CT), which were classified as dystelectasis or atelectasis in five cases and as retention pneumonia in two cases.

Non-131I-scintigraphy in the treatment and follow-up of thyroid cancer. Single-photon-emitters or FDG-PET?

With respect to further therapeutic options, whole-body 131I scintigraphy (WBS) is the most important functional imaging technique during treatment and follow-up of differentiated thyroid cancer. But in many patients, thyroid cancer tissue does not concentrate 131I and can therefore not be localized using WBS. In addition to morphologic techniques, which have a low specificity in many cases, other methods are necessary to localize tumor tissue in these patients.