Applied Radiobiology and Bioeffect Planning

  • David R. Wigg
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Beschrijving
The purpose of this book is to encourage the development of bioeffect planning as an experimental tool so that bioeffect plans may be compared with standard isodose plans. The limitations of isodose planning become apparent in many common clinical circumstances when such comparisons can be made. The fundamental problems of the derivation of useful biological models for clinical application and the description of tumor and normal tissue parameter values and their variability are addressed. Particular emphasis is placed on comparing the predictive value of the models and parameters against clinical results of fractionated and continuous irradiation either alone or combined. Most of the models and graphs are ""live"" and interactive, permitting instant recalculations and redisplay of the graphs as the variables are redefined. The author acknowledges that bioeffect planning is strictly an experimental tool to compare with conventional isodose plans which, for the foreseeable future, remain the standard against which all plans must be judged. However, he believes this work will be helpful in advancing the application of modern and rapidly evolving radiobiology to clinical practice.
Inhoudsopgave
CHAPTER 1 EARLY MODELS OF CLINICAL IMPORTANCE """"WRONG BUTUSEFUL MODELS"""" 1.1 Introduction 1.2 Derivation Of Power Law Models And Time Dose Fractionation Models 1.3 Dose Per Fraction Planning 1.4 The Cell Population Kinetic Model (CPK) 1.5 Basic Theory And Limitations Of Linear-Quadratic Formalisms 1.6 Summary CHAPTER 2 THE VOLUME EFFECT 2.1 Introduction 2.2 Volume Effect Models And Adaptations For Bioeffect Planning 2.3 The Clinical Significance Of The Volume Effect 2.4 Clinical Applications Of The Volume Effect 2.5 Three Dimensional Computer Plans And Dose-Volume Histograms 2.6 Summary CHAPTER 3 ADAPTATIONS OF THE L-Q MODEL FOR BIOEFFECT PLANNINGOF FRACTIONATED AND CONTINUOUS IRRADIATION 3.1 Introduction 3.2 Fractionated Radiotherapy 3.3 Continuous Irradiation 3.4 Repair Rates And The Relationship Between Repair Rates And RadiosensitivityParameters In Continuous Irradiation 3.5 Modification Of L-Q Formalisms For Bioeffect Planning Of Combined Continuous And Fractionated Treatment 3.6 Summation Of Different Schedules Of Continuous Irradiation 3.7 The Determination Of Tumor Control Probability Following Fractionated Radiotherapy 3.8 Summary CHAPTER 4 HYPERFRACTIONATION AND INCOMPLETE REPAIR 4.1 Introduction 4.2 The Incomplete Repair Factor 4.3 Biological Equivalence of Hyperfractionated and Daily Treatment 4.4 Limitations Of Predictive Models 4.5 Prediction Of Tumor Control Probability 4.6 Summary CHAPTER 5 COMBINED CHEMO/RADIOTHERAPY 5.1 Introduction 5.2 Combined Chemo/Radiotherapy Effects On Normal Tissues 5.3 Combined Chemotherapy And Fractionated Irradiation 5.4 Combined Chemotherapy And Low Dose Rate Irradiation 5.5 Summary CHAPTER 6 THE EFFECTS OF TIME AND REPOPULATION DURING THETREATMENT PERIOD ON TISSUE RESPONSES, TUMOR CONTROLPROBABILITY AND OPTIMUM FRACTIONATION 6.1 Introduction 6.2 Fractionated Treatment And Tumor Repopulation 6.3 Continuous Irradiation And Tumor Repopulation 6.4 Summary CHAPTER 7 A RADIOBIOLOGICAL BASIS FOR THE TREATMENT OF ARTERIOVENOUS MALFORMATIONS 7.1 Introduction 7.2 The Radiobiology Of Brain Tissue Treated With Stereotactic Techniques 7.3 The Radiobiology Of Arteriovenous MalformationsObliteration 7.4 Discussion And Summary Appendix To Chapter 7 CHAPTER 8 PLAUSIBLE PARAMETER VALUES OF NORMAL TISSUES ANDTUMORS THAT MAY BE USED FOR PREDICTIVE MODELS AND BIOEFFECTPLANNING 8.1 Introduction 8.2 Tumor Radiosensitivity Parameters Of Predictive Value 8.3 Values 8.4 Intrinsic Radiosensitivity Defined By Values And Their Relevance For Predictive Assays Radiosensitivity Parameters Of Human Tumors 8.6 Radiosensitivity Of Normal Late Reacting Tissues 8.7 The Tissue Specific Volume Exponent Of Normal Late Reacting Tissue 8.8 The Normalized Dose-Response Gradient 8.9 Proliferation Rates Of Human Tumors 8.10 The Number Of Clonogens In Human Tumors 8.11 Dose Per Fraction 8.12 Plausible Radiosensitivity, Tumor And Treatment Variables 8.13 Summary CHAPTER 9 TUMOR CONTROL AND LATE EFFECT PREDICTIVE MODELS ANDTHEIR CLINICAL APPLICATIONS 9.1 Introduction 9.2 Derivation Of Tumor Control Dose/Effect Curves Using A.Linear- Quadratic Based Model For Fractionated Treatment 9.3 Means Of Quantifying Inhomogeneity Effects 9.4 Derivation Of Tumor Control Dose/Effect Curves Using A Survival Fraction At 2.0 Gy (S2) Model 9.5 Derivation Of Normal Tissue Dose/Effect Curves (The Effect Model) 9.6 Applications Of The Effect Model To Compare Tumor Control Probability And Late Reacting Normal Tissue Effects 9.7 Steepness Of Dose Response Curves 9.8 Optimum Fractionation For Fractionated Treatments (The Optimum Model) 9.9 Some Applications Of The Effect Model 9.10 Optimum Fractionation 9.11 Derivation Of Dose Enhancement Factors Of Cytotoxic Drugs On Normal Tissues And Tumors Using The Effect Model With Bioeffect Planning 9.12 Estimates Of Statistical Power And Sample Size Required For Clincal Trials Using The Effect Or Optimum Models 9.13 Tumor Control Probability Prediction Models For Continuous Irradiation (The Confract Model) 9.14 The Use Of The Confract Model To Examine The Interaction Between Normal Late Reacting Tissue And Tumor Variables When Treating With Continuous Irradiation 9.15 The Use Of The Confract Model To Evaluate Predicted Tumor Control Probabilities Following Continuous And Continuous Combined With Fractionated Treatment For Comparison With Clinical Results 9.16 Summary CHAPTER 10 EXAMPLES OF CLINICAL APPLICATIONS OF BIOEFFECTPLANNING 10.1 Introduction 10.2 Impediments To The Development Of Bioeffect Planning 10.3 A Teaching Tool. Display Of """"Live"""" Interactive Models 10.4 The First Step To Bioeffect Planning In The Clinic. Dose Per Fraction Display Plots 10.5 Examples Of Bioeffect Plans 10.6 Published Papers On Bioeffect Planning By The Author 10.7 Summary APPENDICES A, B, C In appendices A, B, C are more examples of bioeffect plans, basic theory and descriptions of thelimitations of isodose planning. GLOSSARY BIBLIOGRAPHY INDEX
Productdetails
Uitgavejaar 2001
ISBN 9781930524057
Verschijningsdatum 30 okt. 2001
Omvang 486
Auteur(s) David R. Wigg
Bindwijze Paperback
Taal Engels
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