Improved determination of the position and activity of a radioactive point source inside a bulky medium using several detectors. The special case of a lung counter—A general view
| Autor: | Flavia Groppi, U. German, Zeev B. Alfassi, O. Pelled, Mauro Bonardi |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Physics
Mathematical optimization Radiation Phantoms Imaging Point source business.industry Physics::Medical Physics Detector equipment and supplies Lung counter Imaging phantom Particle detector Semiconductor detector Optics Position (vector) Calibration Animals Humans Uranium Radiometry business Lung Radioactive Pollutants |
| Zdroj: | Applied Radiation and Isotopes. 65:234-238 |
| ISSN: | 0969-8043 |
| DOI: | 10.1016/j.apradiso.2006.07.006 |
| Popis: | A method is described to locate a radioactive point source in a lung using a commercial array of lung detectors. The method takes advantage of the fact that modern commercial systems consist of several Ge detectors, each connected to a multi-channel analyzer, and the information from each detector can be analyzed separately. The system is calibrated with point sources placed in various locations in the lungs of a phantom. A vector method is presented for determining which of the calibration locations in the phantom is closest to the location of the unknown point source. It has been shown that the accuracy of the method increases with increasing number of the vector dimensions. A higher dimensionality can be achieved by analyzing counts of several gamma lines or by using more detectors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect