A prospective trial of short-fractionation radiotherapy for the palliation of liver metastases

The purpose of this study was to prospectively examine the effectiveness and tolerability of a simple radiotherapy technique for the palliation of symptomatic liver metastases. Twenty-eight patients with symptomatic liver metastases were enrolled from seven centres, and received targeted (partial or whole) liver irradiation consisting of 10 Gy in two fractions over 2 days. Symptoms at baseline were hepatic pain (27 patients), abdominal distension (19), night sweats (12), nausea (18) and vomiting (eight). Twenty-two patients (76%) had failed previous treatment with chemotherapy, hormonal therapy and/or high-dose steroids. Symptoms and potential toxicities were prospectively assessed at the time of treatment, then 2, 6 and 10 weeks later. Individual symptom response rates were 53−66% at 2 weeks. Partial or complete global symptomatic responses were noted in 15 patients (54%) overall. The treatment was well tolerated with two patients (7%) experiencing grade 3 toxicity (one vomiting and one diarrhoea); however, four patients reported temporary worsening of pain shortly after treatment. This simple and well-tolerated treatment achieves useful palliation.

Quality assurance experience with the randomized neuropathic bone pain trial (Trans-Tasman Radiation Oncology Group, 96.05)

Background and purpose: Trans-Tasman Radiation Oncology Group 96.05 is a prospective randomized controlled trial comparing a single 8 Gy with 20 Gy in five fractions of radiotherapy (RT) for neuropathic pain due to bone metastases. This paper summarizes the quality assurance (QA) activities for the first 234 patients (accrual target 270). Materials and methods: Independent audits to assess compliance with eligibility/exclusion criteria and appropriateness of treatment of the index site were conducted after each cohort of approximately 45 consecutive patients. Reported serious adverse events (SAEs) in the form of cord/cauda equina compression or pathological fracture developing at the index site were investigated and presented in batches to the Independent Data Monitoring Committee. Finally, source data verification of the RT prescription page and treatment records was undertaken for each of the first 234 patients to assess compliance with the protocol. Results: Only one patient was found conclusively not to have genuine neuropathic pain, and there were no detected 'geographical misses' with RT fields. The overall rate of detected infringements for other eligibility criteria over five audits (225 patients) was 8% with a dramatic improvement after the first audit. There has at no stage been a statistically significant difference in SAEs by randomization arm. There was a 22% rate of RT protocol variations involving ten of the 14 contributing centres, although the rate of major dose violations (more than +/- 10% from protocol dose) was only 6% with no statistically significant difference by randomization arm (P = 0.44). Conclusions: QA auditing is an essential but time-consuming component of RT trials, including those assessing palliative endpoints. Our experience confirms that all aspects should commence soon after study activation. Crown Copyright (C) 2003 Published by Elsevier Science Ltd. All rights reserved.

Audit of postoperative chemoradiotherapy as adjuvant therapy for resected gastroesophageal adenocarcinoma: An Australian multicentre experience

Background: Improved disease free and overall survivals were seen in curatively resected patients with gastric and gastroesophageal adenocarcinoma treated with the Intergroup 0116 (INT 0116) protocol of postoperative adjuvant chemoradiotherapy compared to surgery alone. This protocol has not been widely adopted in Australian centres because of perceived risks of toxicity. Methods: We reviewed the case records from 45 consecutive patients treated between May 1998 and August 2003 with the INT 0116 protocol and variations at five Australian institutions. The median age was 61.5 years (range 38-79). Twenty-nine patients had gastric and 12 had gastroesophageal junction primaries. All patients had attempted curative resection, however, seven had involved microscopic margins (R1 resection). Thirty-five had regional node involvement and none had evidence of distant metastasis. Results: The overall National Cancer Institute - Common Toxicity Criteria (NCI-CTC) version 2.0 grade 3 and grade 4 toxicity rates for all patients were 37.8% and 4.4%, respectively. There were no treatment related deaths. Gastrointestinal grade 3 toxicity was observed in 20% of patients, while haematologic grade 3 and 4 toxicity was observed in 17.8%. Toxicities experienced led to chemotherapy dose reductions in 22 patients and dose delay in 11 patients. Seven patients had a delay in radiotherapy and two did not proceed with radiotherapy. At a median follow up of 16 months (range 5-35) from surgery, 28 patients have relapsed (six with local recurrence alone) with 22 deaths occurring, all but one caused by cancer. Conclusion: The INT 0116 protocol is a safe and feasible schedule in a multicentre setting with an acceptable rate of toxicity and is an appropriate adjuvant treatment option for high-risk resected gastroesophageal adenocarcinoma.

Somatostatin receptors as targets for nuclear medicine imaging and radionuclide treatment

Radiolabeled peptides have been an important class of compounds in radiopharmaceutical sciences and nuclear medicine for more than 20 years. Despite strong research efforts, only somatostatin-based radiopeptides have a real impact on patient care, diagnostically and therapeutically. [(111)In-diethylenetriaminepentaacetic acid(0)]octreotide is commercially available for imaging. Imaging was highly improved by the introduction of PET radionuclides such as (68)Ga, (64)Cu, and (18)F. Two peptides are successfully used in targeted radionuclide therapy when bound to DOTA and labeled with (90)Y and (177)Lu.

A pilot study of nuclear medicine reporting through the Medically Oriented Data System /

Mode of access: Internet.

Workshop manual for quality control of scintillation cameras in nuclear medicine /

Mode of access: Internet.

Modelagem de um sistema de planejamento em radioterapia e medicina nuclear com o uso do código MCNP6

Tese (Doutorado em Tecnologia Nuclear)

DIAGNOSIS of REGIONAL CEREBRAL BLOOD FLOW ABNORMALITIES USING SPECT: AGREEMENT BETWEEN INDIVIDUALIZED STATISTICAL PARAMETRIC MAPS and VISUAL INSPECTION BY NUCLEAR MEDICINE PHYSICIANS WITH DIFFERENT LEVELS of EXPERTISE IN NUCLEAR NEUROLOGY

INTRODUCTION: Visual analysis is widely used to interpret regional cerebral blood flow (rCBF) SPECT images in clinical practice despite its limitations. Automated methods are employed to investigate between-group rCBF differences in research Studies but have rarely been explored in individual analyses.OBJECTIVES: To compare visual inspection by nuclear physicians with the automated statistical parametric mapping program using a SPECT dataset of patients with neurological disorders and normal control images.METHODS: Using statistical parametric mapping, 14 SPECT images from patients with various neurological disorders were compared individually with a databank of 32 normal images using a statistical threshold of p<0.05 (corrected for multiple comparisons at the level of individual voxels or clusters). Statistical parametric mapping results were compared with Visual analyses by a nuclear physician highly experienced in neurology (A) as well as a nuclear physician with a general background of experience (B) who independently classified images as normal or altered, and determined the location of changes and the severity.RESULTS: of the 32 images of the normal databank, 4 generated maps showing rCBF abnormalities (p<0.05, corrected). Among the 14 images from patients with neurological disorders, 13 showed rCBF alterations. Statistical parametric mapping and physician A completely agreed on 84.37% and 64.28% of cases from the normal databank and neurological disorders, respectively. The agreement between statistical parametric mapping and ratings of physician B were lower (71.18% and 35.71%, respectively).CONCLUSION: Statistical parametric mapping replicated the findings described by the more experienced nuclear physician. This finding suggests that automated methods for individually analyzing rCBF SPECT images may be a valuable resource to complement visual inspection in clinical practice.

Nuclear medicine : bibliography from Nuclear Science Abstracts volume 22.

"TID-4500."

Semiconductor detectors in medicine, March 8-9, 1973, presented by Nuclear Medicine Division, Department of Radiology, University of California School of Medicine and Continuing Education in Health Sciences, University of California, San Francisco, California, supported in part by KeVex Corporation, Burlingame, California [et al.

Mode of access: Internet.