PET/CT calibration for post-treatment standard body scan acquisition with yttrium-90 resin micro-SPHERES.

Introduction: Among the objectives in treatments with yttrium-90 spheres, is to demonstrate that the tumoricidal dose is achieved and that hepatotoxic doses are avoided, as well as that there is no extrahepatic deposition.

Material And Methods: We use different amounts of yttrium-90 resin micro-spheres and a NEMA NU2-2007 phantom to check if the scanner maintains a response that allows real dosimetric calculations.

Results: The Gemini tomograph responds linearly in a wide range of activities with R = 0.

Bone marrow trephine biopsy in Hodgkin's lymphoma. Comparison with PET-CT scan in 65 patients.

Background And Objectives: To compare bone marrow biopsy (BMB) and PET/CT in detecting bone marrow involvement in Hodgkin's lymphoma MATERIAL AND METHODS: Retrospective analysis of 65 patients with both tests in the initial staging or in relapse with special attention to the PET/CT uptake pattern.

Results: In 3 patients (4.6%), the BMB showed bone marrow involvement with the PET/CT being positive in them all: 2 with diffuse+multifocal pattern and one diffuse only.

Unsuspected uterine metastasis of breast carcinoma diagnosed by 18F-FDG PET/CT.

A 50-year-old woman with a history of bilateral lobular carcinoma of the breast in 1995 and 2001 was treated with mastectomy, axillary lymphadenectomy, chemotherapy, and hormone therapy which achieved a complete response. In 2009, the patient developed a progressive elevation of tumor markers. A CT scan was performed showing no suspicious malignant lesions.