Dosimetric Characteristics on Penumbra Regions of the multileaf Collimator as Compared with the Lead Alloy Block / 대한치료방사선과학회지
Journal of the Korean Society for Therapeutic Radiology
;
: 391-396, 1995.
Artículo
en Coreano
| WPRIM
| ID: wpr-139771
ABSTRACT
PURPOSE:
The Conformal Radiation Therapy has been widely used under favour of development of computer technologies. The delivery of a large number of static radiation fields are being necessary for the conformal irradiation. In this paper, we investigate dosimetric characteristics on penumbra regions of a multileaf collimator(MLC), and compare to those of lead alloy block for he optimal use of the system in 3-D conformal radiotherapy. MATERIALS ANDMETHODS:
The measurement of penumbra by MLC or lead alloy block was performed with 6 or 10 MV X-rays. The film was positioned at a dmax depth and 10 cm depth, and its optical density was determined using a scanning videodensitometer. The effective penumbra, the distance from 80% to 20% isodose lines and 90 to 10 were analyzed as a function of the angle between the direction of leaf motion and the edge defined by leaves.RESULTS:
Increasing MLC angle (0-75degree) was observed with increasing the penumbra widths and the scalloping effect. There was no definite differences of penumbra width from 80% to 20% isodose lines, while being the small increase of penumbra width of lead alloy block are agree reasonably with those of MLC within 4.8mm.CONCLUSION:
The comparative qualitative study of the penumbra between MLC and lead alloy block demonstrate the clinical acceptability and suitability of the multileaf collimator for 3-D conformal radiotherapy.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Radioterapia Conformacional
/
Aleaciones
/
Pectinidae
/
Dosimetría por Película
Tipo de estudio:
Investigación cualitativa
Idioma:
Coreano
Revista:
Journal of the Korean Society for Therapeutic Radiology
Año:
1995
Tipo del documento:
Artículo
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