The effect of metallic tracheal stents on radiation dose in the airway and surrounding tissues
| Autor: | Syed S. Razi, David Y. Lee, Koji Park, F.Y. Bhora, Anudh K. Jain, Jason Ostenson, Gary S. Schwartz, Jordan R. Sasson, F. Trichter, Andrew Evans |
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| Rok vydání: | 2014 |
| Předmět: |
medicine.medical_specialty
Dosimeter Phantoms Imaging Swine business.industry medicine.medical_treatment Stent Dose-Response Relationship Radiation Airway obstruction Radiation Dosage equipment and supplies medicine.disease Imaging phantom Planned Dose Tracheal Neoplasm Alloys medicine Animals Stents Tracheal Neoplasms Surgery Radiology Radiation treatment planning Airway business |
| Zdroj: | Journal of Surgical Research. 189:1-6 |
| ISSN: | 0022-4804 |
| DOI: | 10.1016/j.jss.2014.01.013 |
| Popis: | Background Metallic airway stents are often used in the management of central airway malignancies. The presence of a metallic foreign body may affect radiation dose in tissue. We studied the effect of a metallic airway stent on radiation dose delivery in a phantom and an in vivo porcine model. Methods A metallic tracheal stent was fitted onto a support in a water phantom. Point dosimeters were positioned in the phantom around the support and the stent. Irradiation was then performed on a linear accelerator with and without the stent. Metallic tracheal stents were deployed in the trachea of three pigs. Dosimeters were implanted in the tissues near (Group 1) and away (Group 2) from the stent. The pigs were then irradiated, and the dose perturbation factor was calculated by comparing the actual dose detected by the dosimeters versus the planned dose. Results The difference in the dose detected by the dosimeters and the planned dose ranged from 1.8% to 6.1% for the phantom with the stent and 0%–5.3% for the phantom without the stent. These values were largely within the manufacturer's specified error of 5%. No significant difference was observed in the dose perturbation factor for Group 1 and Group 2 dosimeters (0.836 ± 0.058 versus 0.877 ± 0.088, P = 0.220) in all the three pigs. Conclusions Metallic airway stents do not significantly affect radiation dose in the airway and surrounding tissues in a phantom and porcine model. Radiation treatment planning systems can account for the presence of the stent. External beam radiation can be delivered without concern for significant dose perturbation. |
| Databáze: | OpenAIRE |
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