Examination of Formula for Enhanced Dynamic Wedge Factors in Half Fields
نویسندگان
چکیده
منابع مشابه
Enhanced dynamic wedge factors at off‐axis points in asymmetric fields
Several recent reports have described methods for calculating enhanced dynamic wedge factors (EDWFs). Many of these reports use the monitor-unit (MU) fraction method to predict EDWFs as a function of field size. Although simple in approach, MU fraction methods do not produce accurate EDWFs in large or asymmetric fields. A recently described technique, based on the MU fraction method works well ...
متن کاملComparison of Beam Profiles and Wedge Factors for Physical and Enhanced Dynamic Wedge
The linear accelerator (linac) is a device that uses highfrequency electromagnetic waves to accelerate charged particles such as electrons to high energies through a linear tube. The high-energy electron beam can be used for treating superficial tumours, or it can be made to strike a target to produce x-rays for treating deep-seated tumours. In the majority of instances, the collimated beam eme...
متن کاملComparison of Beam Profiles and Wedge Factors for Physical and Enhanced Dynamic Wedge
The linear accelerator (linac) is a device that uses highfrequency electromagnetic waves to accelerate charged particles such as electrons to high energies through a linear tube. The high-energy electron beam can be used for treating superficial tumours, or it can be made to strike a target to produce x-rays for treating deep-seated tumours. In the majority of instances, the collimated beam eme...
متن کاملComparison of Beam Profiles and Wedge Factors for Physical and Enhanced Dynamic Wedge
The linear accelerator (linac) is a device that uses highfrequency electromagnetic waves to accelerate charged particles such as electrons to high energies through a linear tube. The high-energy electron beam can be used for treating superficial tumours, or it can be made to strike a target to produce x-rays for treating deep-seated tumours. In the majority of instances, the collimated beam eme...
متن کاملElimination of field size dependence of enhanced dynamic wedge factors.
Enhanced dynamic wedge factors (EDWF) are characterized by a strong field size dependence. In contrast to physical wedge factors, the EDWF decrease as the field size is increased: for 6 MV 60 degrees wedge, the EDWF decreases by 50% when the field size is increased from 4 x 4 cm2 to 20 x 20 cm2. A method that eliminates the field size dependence of EDWF was developed and investigated in this wo...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 2006
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.62.409