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Different intensity extension methods and their impact on entrance dose in breast radiotherapy: A study.

Sankar A, Velmurugan J - J Med Phys (2009)

Bottom Line: The impact of these two different intensity extension methods on skin dose was studied by measuring the entrance dose of the treatment fields using semiconductor diode detectors.We found no significant difference in entrance dose due to different methods used for intensity extension.However, in the skin flash tool method, selection of appropriate parameters is important to get optimum fluence extension.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiation Therapy, Salmaniya Medical Complex, Salmaniya, Kingdom of Bahrain.

ABSTRACT
In breast radiotherapy, skin flashing of treatment fields is important to account for intrafraction movements and setup errors. This study compares the two different intensity extension methods, namely, Virtual Bolus method and skin flash tool method, to provide skin flashing in intensity modulated treatment fields. The impact of these two different intensity extension methods on skin dose was studied by measuring the entrance dose of the treatment fields using semiconductor diode detectors. We found no significant difference in entrance dose due to different methods used for intensity extension. However, in the skin flash tool method, selection of appropriate parameters is important to get optimum fluence extension.

No MeSH data available.


Related in: MedlinePlus

A hypothetical target volume and OAR drawn on a phantom image set for the study
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Related In: Results  -  Collection

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Figure 0001: A hypothetical target volume and OAR drawn on a phantom image set for the study

Mentions: A hypothetical target volume which resembles the shape of a breast in the axial plane is drawn on a PTW cylindrical phantom CT data set. This is used to generate all the plans in our study. A dose limiting structure (OAR) is also drawn adjacent to the target volume to restrict the prescription dose to target volume [figure 1]. A prescription dose of 100 cGy to target volume has been used in all plans.


Different intensity extension methods and their impact on entrance dose in breast radiotherapy: A study.

Sankar A, Velmurugan J - J Med Phys (2009)

A hypothetical target volume and OAR drawn on a phantom image set for the study
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2807141&req=5

Figure 0001: A hypothetical target volume and OAR drawn on a phantom image set for the study
Mentions: A hypothetical target volume which resembles the shape of a breast in the axial plane is drawn on a PTW cylindrical phantom CT data set. This is used to generate all the plans in our study. A dose limiting structure (OAR) is also drawn adjacent to the target volume to restrict the prescription dose to target volume [figure 1]. A prescription dose of 100 cGy to target volume has been used in all plans.

Bottom Line: The impact of these two different intensity extension methods on skin dose was studied by measuring the entrance dose of the treatment fields using semiconductor diode detectors.We found no significant difference in entrance dose due to different methods used for intensity extension.However, in the skin flash tool method, selection of appropriate parameters is important to get optimum fluence extension.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiation Therapy, Salmaniya Medical Complex, Salmaniya, Kingdom of Bahrain.

ABSTRACT
In breast radiotherapy, skin flashing of treatment fields is important to account for intrafraction movements and setup errors. This study compares the two different intensity extension methods, namely, Virtual Bolus method and skin flash tool method, to provide skin flashing in intensity modulated treatment fields. The impact of these two different intensity extension methods on skin dose was studied by measuring the entrance dose of the treatment fields using semiconductor diode detectors. We found no significant difference in entrance dose due to different methods used for intensity extension. However, in the skin flash tool method, selection of appropriate parameters is important to get optimum fluence extension.

No MeSH data available.


Related in: MedlinePlus