Measurements of Setup Error and Physiological Movement of Liver by Using Electronic Portal Imaging Device in Patients with Hepatocellular Carcinoma / 대한방사선종양학회지
The Journal of the Korean Society for Therapeutic Radiology and Oncology
;
: 107-113, 2000.
Artigo
em Coreano
| WPRIM
| ID: wpr-190561
ABSTRACT
PURPOSE:
The goal of this study was to improve the accuracy of three-dimensional conformal radio therapy (3-D CRT) by measuring the treatment setup error and physiological movement of liver based on the analysis of images which were obtained by electronic portal imaging device (EPID). MATERIALS ANDMETHODS:
For 10 patients with hepatocellular carcinoma, 4-7 portal images were obtained by using EPID during the radiotherapy from each patient daily. We analyzed the setup error and physiological movement of liver based on the verification data. We also determined the safety margin of the tumor in 3-D CRT through the analysis of physiological movement.RESULTS:
The setup errors were measured as 3 mm with standard deviation 1.70 mm in x direction and 3.7 mm with standard deviation 1.88 mm in y direction respectively. Hence, deviation were smaller than 5 mm from the center of each axis. The measured range of liver movement due to the physiological motion was 8.63 mm on the average. Considering the motion of liver and setup error, the safety margin of tumor was at least 15 mm.CONCLUSION:
EPID is a very useful device for the determination of the optimal margin of the tumor, and thus enhance the accuracy and stability of the 3-D CRT in patients with hepatocellular carcinoma.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Radioterapia
/
Vértebra Cervical Áxis
/
Carcinoma Hepatocelular
/
Fígado
Limite:
Humanos
Idioma:
Coreano
Revista:
The Journal of the Korean Society for Therapeutic Radiology and Oncology
Ano de publicação:
2000
Tipo de documento:
Artigo
Similares
MEDLINE
...
LILACS
LIS