[Dose-volume histograms and 3-D planning in breast-saving therapy of breast carcinoma]. / Dosis-Volumen-Histogramme und 3D-Planung bei der brusterhaltenden Therapie des Mammakarzinoms.
Strahlenther Onkol
; 174(6): 329-32, 1998 Jun.
Article
en De
| MEDLINE
| ID: mdl-9645215
ABSTRACT
AIM:
Improvement of the dose homogeneity in radiation treatment of the intact breast using 3D-planning and dose volume histograms. PATIENTS ANDMETHOD:
3D-planning, including the calculation of dose volume histograms of the planning target volume, was performed on 15 patients, who underwent radiation therapy with tangential photon beams. A standard plan and 2 modified or optimized plans were evaluated. Different dosimetric parameters like maximum dose, mean dose, standard deviation and the fractional volume which receives doses from 95 to 105% of the reference dose were compared and correlated with breast size.RESULTS:
With increasing breast size standard planning leads to increased overdosage, both in magnitude and volume. Individual optimization by modifying weights and wedges gives no improvement in dose homogeneity, whereas a photon energy of 10 MV results in a more homogeneous dose distribution. The drawback of the higher energy is the increased underdosage of the skin.CONCLUSION:
Using the standard geometry of tangential fields the dose homogeneity cannot be improved significantly by 3D-planning, compared to our standard technique.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Procesamiento de Imagen Asistido por Computador
/
Planificación de la Radioterapia Asistida por Computador
/
Neoplasias de la Mama
/
Tomografía Computarizada por Rayos X
Límite:
Female
/
Humans
Idioma:
De
Revista:
Strahlenther Onkol
Asunto de la revista:
NEOPLASIAS
/
RADIOTERAPIA
Año:
1998
Tipo del documento:
Article