Radiotherapy radiation dose changes due to lung inhomogeneity density changes:

Description the concept it and new writing to be different from old search.  Have to write 1 Introduction 2 Literature Review 2.1 Radiation Therapy 2.2 Stereotactic body radiation therapy (SBRT) 2.2.1 Development of SBRT 2.2.2 Rational for using Stereotactic Body Radiotherapy in Lung cancer 2.2.3 Immobilization and target motion issues 2.2.4 Image-Guided localization 2.3 Inhomogeneity of lung 2.3.1 Density Variation 2.3.2 Charge Particle Equilibrium & Lateral Electron Disequilibrium 2.3.3 Density scaling 2.4 INHOMOGENEITY CORRECTION METHODS 2.4.1 Effective Path Length 2.4.2 Equivalent tissue-air ratio (E-TAR) 2.4.3 Convolution- Superposition Treatment Planning Algorithm The pencil beam convolution (PBC), Collapsed cone (CC) and Anisotropic Analytical Algorithms (AAA) 2.4.4 Monte Carlo radiation transport 2.4.5 Dose calculation methods for lung 2.5 Quality assurance in lung cancer

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