PMID: 9169831Mar 15, 1997Paper

Dynamics of pear-shaped dimensions and volume of intracavitary brachytherapy in cancer of the cervix: a desirable pear shape in the era of three-dimensional treatment planning

International Journal of Radiation Oncology, Biology, Physics
R Y KimL J Virostek

Abstract

To evaluate the dynamics of pear-shaped dimensions and volume of the intracavitary brachytherapy, and to define a desirable pear-shape in the era of three-dimensional (3D) treatment planning. Since Point A has been used for the dose specification, the pear shape defined the surface enclosed by Point A. This study utilized a new method of evaluating pear-shaped dimensions and its configuration. The pear shape was artificially divided into tandem and colpostat portions for evaluation of its changes. Width, height, and thickness at the tandem portion (Wt, Ht, and Tt) and at the colpostat portion (Wc, Hc, and Tc) were defined, respectively, on the frontal and sagittal plane. To evaluate the dynamics of the pear-shape configuration, 12 variations of applicator geometry and source loading were applied to generate the pear-shape isodose line and dose-volume histogram. When the source strengths in the colpostats were reduced for optimization with the same dose to Point A dose, Wc, Hc, and Tc were decreased, whereas Wt, Ht, and Tt were increased without a change in the overall pear-shaped volume. When the separation of the colpostats was increased without a change in the source strength, Wc was increased, whereas Hc and Tc were reduced ...Continue Reading

References

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Citations

Apr 6, 2004·Brachytherapy·Beth A Erickson
Feb 13, 2001·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·R CetingözM Kinay
Mar 2, 2002·International Journal of Radiation Oncology, Biology, Physics·I-Chow J HsuJean Pouliot
Jan 31, 2009·Journal of Medical Imaging and Radiation Oncology·S van DykD Bernshaw
Apr 1, 2008·Journal of Medical Imaging and Radiation Oncology·S van Dyk, D Bernshaw
Mar 4, 1998·Current Opinion in Obstetrics & Gynecology·P M DesRosiersM E Randall
Aug 5, 2021·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Robert Y KimSui Shen

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