The Physics of CT Dosimetry

Robert L. Dixon, Ph.D, FACR, FAAPM is Professor Emeritus in the Department of Radiology, Wake Forest University School of Medicine, USA and holds a Ph.D. in Nuclear Physics. He has taught physics and medical physics for decades, and is a recipient of the Radiology Department’s Teaching Excellence Award. He is also a past president of the American Association of Physicists in Medicine (AAPM) as well as past Chairman of the AAPM Science Council and CT Committee; and is a past Vice President of RSNA. He has published many papers on CT dosimetry in the journal Medical Physics and is a five-time winner of the SEAAPM Best Publication Award. Prof. Dixon is a member of the IEC MT30 CT committee; is a designated US CT Expert (ANSI); and has been an invited keynote speaker at multiple International Conferences. He has also been a member of the Governing Board and the Executive Committee of the American Institute of Physics (AIP), and has received the Distinguished Service Award and the Lifetime Achievement Award of the American Board of Radiology (ABR). He was also an airshow performer (1991-2006) flying former military aircraft including an ex- Soviet Air Force jet.

Chapter 1: Introduction and History. Chapter 2: Derivation of Dose Equations for Shift-Invariant Techniques and the Physical Interpretation of the CTDI-Paradigm. Chapter 3: Experimental Validation of a Versatile System of CT Dosimetry Using a Conventional Small Ion Chamber. Chapter 4: An Improved Analytical Primary Beam Model for CT Dose Simulation. Chapter 5: Cone beam CT Dosimetry: A Unified and Self-Consistent Approach Including All Scan Modalities – With or Without Phantom Motion. Chapter 6: Analytical Equations for CT Dose Profiles Derived Using a Scatter Kernel of Monte Carlo Parentage Having Broad Applicability to CT Dosimetry Problems. Chapter 7: Dose Equations for Tube Current Modulation in CT Scanning and the Interpretation of the Associated CTDIvol. Chapter 8: Dose Equations for Shift-Variant CT Acquisition Modes Using Variable Pitch, Tube Current, and Aperture, and the Meaning of their Associated CTDIvol. Chapter 9: Stationary Table CT Dosimetry and Anomalous Scanner-Reported Values of CTDIvol. Chapter 10: Future Directions of CT Dosimetry and A Book Summary.