Feasibility Study of the Real-Time IMRT Dosimetry Using a Scintillation Screen / 대한방사선종양학회지
The Journal of the Korean Society for Therapeutic Radiology and Oncology
;
: 64-68, 2004.
Artigo
em Coreano
| WPRIM
| ID: wpr-55467
ABSTRACT
PURPOSE:
To study the feasibility of verifying real-time 2-D dose distribution measurement system with the scintillation screen for the quality assurance. MATERIALS ANDMETHODS:
The water phantom consisted of a scintillation screen (LANEX fast screen, Kodak, USA) that was axially located in the middle of an acrylic cylinder with a diameter of 25 cm. The charge-coupled device (CCD) camera was attached to the phantom in order to capture the visible light from the scintillation screen. To observe the dose distribution in real time, the intensity of the light from the scintillator was converted to a dosage. The isodose contours of the calculations from RTP and those of the measurements using the scintillation screen were compared for the arc therapy and the intensity modulated radiation therapy (IMRT).RESULTS:
The kernel, expressed as a multiplication of two error functions, was obtained in order to correct the sensitivity of the CCD of the camera and the scintillation screen. When comparing the calculated isodose and measured isodose, a discrepancy of less than 8 mm in the high dose region was observed.CONCLUSIONS:
Using the 2-D dosimetry system, the relationship between the light and the dosage could be found, and real-time verification of the dose distribution was feasible.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Água
/
Estudos de Viabilidade
/
Luz
Idioma:
Coreano
Revista:
The Journal of the Korean Society for Therapeutic Radiology and Oncology
Ano de publicação:
2004
Tipo de documento:
Artigo
Similares
MEDLINE
...
LILACS
LIS