Overall target definition has been changed in an estimated range of 30 to 60percentt of patients[15].
Furthermore, these changes will likely affect PET avidity and degree of heterogeneity, which can impact biological target definition.
Specific issues that will be addressed will include normal tissue tolerance, target definition, treatment field design in regard to isodose curves and dose-volume histograms, and immobilization.
Without DSA as the primary image, target definition may be less than optimal, in some cases precluding the ability to treat with a frameless system.
These toxicities, plus the advent of increasingly conformal radiation therapy, have prioritized target definition and the use of involved-field radiation therapy (IFRT).
The 4 stages of Patent design around include design around target definition, design around problem identification, problem solving, and solution evaluation.
Following target definition under PET/CT guidance and motion management, the target prescription can be defined in a variety of ways.
If PET/CT treatment simulation becomes standardized, clinical translation of research advances in biological target definition and imaging uncertainty mitigation will follow.
(c) Finally, data from literature research regarding values established and achieved, at the international level, were used as references for target definition.
To investigate the dosimetric impact of using 4D CT and multiphase (helical) CT images for treatment planning target definition and the daily target coverage in hypofractionated stereotactic body radiotherapy (SBRT) of lung cancer.
