Background. The aim of the study was to evaluate the clinical characteristics, the radiological findings, and the treatment effect on the patients with bone metastases from malignant melanoma. Patients and methods. Retrospective review of 293 stage IV melanoma patients during a 15-year period was made. Results. Twenty-eight patients (9.5%) with bone metastases were identified; all patients had ...

A male patient in his 20s presented at our clinic with pain caused by bone metastases of the primitive neuroectodermal tumor, and Sr-89 was administrated to palliate the pain. After receiving the injection, the patient complained of a slight burning pain at the catheterized area. Slight reddening and small circular swelling (diameter, 0.5 cm) were observed at the catheterized area. Sr-89 extrav...

Radionuclide therapy has been an integral part of systemic treatment of patients with advanced and disseminated cancer for 50 years. Specific radioisotopes (b- or a-emitters) with selective concentration at sites of bone cancer damage are used in the treatment. Radioisotopes are an important addition to the armamentarium of clinicians who take care of patients with advanced cancer and painful c...

Bone metastases radionuclide therapy (bmrt) plays a major role in the treatment of malignant bone pain. However multicentre studies with large number of patients need to be done in order to define optimal disease settings and modalities to maximise the effects of bmrt. At present, an Italian observational study on bmrt involves 72 nuclear medicine centres. In order to facilitate data collection...

Integrated systems combining functional (single-photon emission computed tomography; SPECT) imaging with anatomic (computed tomography; CT) imaging have the potential to greatly improve the accuracy of dose estimation in radionuclide therapy. In this article, we present the methodology for highly patient-specific tumor dosimetry by utilizing such a system and apply it to a pilot study of 4 foll...

UNLABELLED This study is a retrospective analysis of 124 differentiated thyroid cancer patients who underwent dosimetric evaluation using MIRD methodology over a period of 15 y. The objectives of the study were to demonstrate the clinical use of dosimetry-guided radioactive iodine ([RAI] (131)I) treatment and the safe and effective application of a 3-Gy bone marrow (BM) dose in patients with di...

In this work isodose curves are obtained by the use of a new dosimetric algorithm using numerical data from percentage depth dose (PDD) and the maximum absorbed dose profile, calculated by Monte Carlo in a 18 MV LINAC. The software allows reproducing the absorbed dose percentage in the whole irradiated volume quickly and with a good approximation. To validate results an 18 MV LINAC with a whole...

RATIONALE Choline (CH) positron emission tomography (PET)/computed tomography (CT) with fluorine 18 (F) CH is increasingly used not only to evaluate patients with biochemically recurrent prostate cancer but also to assess metastatic lesions that are difficult or impossible to identify using more conventional modalities. Our experience with CH PET/CT has shown that it can also be used for many o...

Peptide receptor radionuclide therapy (PRRT) is an effective MRT (molecular radiotherapy) treatment, which consists of multiple administrations of a radiopharmaceutical labelled with 177Lu or 90Y. Through sequential functional imaging a patient specific 3D dosimetry can be derived. Multiple scans should be previously co-registered to allow accurate absorbed dose calculations. The purpose of thi...