Intro
Foreword
Preface
Acknowledgements
Contents
About the Authors
Abbreviations
1: Introduction
References
2: Patient-Centred Communication in Imaging
2.1 Introduction
2.2 What Is Communication?
2.3 Verbal and Nonverbal Communication
2.4 Sign, Symbols, and Codes
2.5 Denotative and Connotative Meanings
2.6 Ensuring a Successful CTC Study: Suggested Communication Materials to Inform Patients of Their Responsibilities
2.7 CTC Examinations and Patient Feedback
2.8 Readability of Imaging Reports

2.9 Readability of Text of Instructions and Informed Consent for Patients
2.10 Summary
References
3: Informed Consent
3.1 Introduction
3.2 What Is Consent?
3.2.1 Valid Consent
3.3 Why Informed Consent in CTC?
3.3.1 Informed Consent in Terms of the Use of Artificial Intelligence
3.4 The Legal Aspects of Consent
3.5 Patient Information
3.6 Risks Associated with CTC Procedures
3.7 The Duty of Consent and the Role of a CTC Radiographer
3.8 Good Practice in Information Giving
3.9 Clinical Audit to Include Informed Consent and Patient Information

3.10 Summary
References
4: Principles of CT and Hybrid Imaging
4.1 Introduction
4.2 Principles of CT
4.2.1 The X-ray Tube
4.2.2 What Are We Imaging?
4.3 Tomographic Reconstruction: Backprojection
4.3.1 Backprojection: An Example
4.4 Tomographic Reconstruction: Iterative Reconstruction
4.5 CT Numbers
4.6 Multi-Slice CT
4.7 Other Considerations
4.8 Hybrid Imaging
4.9 Summary
References
5: Principles of Radiation Dose in CT and CT Colonography
5.1 Introduction
5.2 Radiation Units
5.3 CT-Specific Radiation Dose Measures

5.3.1 The CTDI Measurement
5.3.2 Limitations of CTDI
5.4 Effective Dose
5.5 Low-Dose CTC
5.6 Dosimetric Considerations of Dual-Energy CT (DECT)
5.7 Dose for Clinical Audits
5.8 Summary
References
6: Dose Optimisation in CT Colonography
6.1 Introduction
6.2 Justification
6.3 Optimisation
6.3.1 Risk
6.4 Patient Dose in CT: Controllable and Built-in Factors
6.4.1 Tube Current
6.4.2 Automatic Tube Current Modulation
6.4.3 Tube Voltage
6.4.4 Iterative Reconstruction
6.4.4.1 Use of Artificial Intelligence in CT Image Reconstruction

6.4.5 Pre-patient Beam Filter
6.4.6 Active Collimators: Over-Ranging
6.4.7 Detector Material
6.4.8 Shielding
6.4.9 Pitch
6.4.10 Slice Thickness
6.4.11 Matrix Size
6.5 Other Practical Dose Saving Approaches
6.6 Diagnostic Reference Levels as an Optimisation Tool
6.7 Ethics in Radiology Imaging
6.8 Conclusion
References
7: Overview of CTC in Imaging the Colon
7.1 Introduction
7.2 Reasons for Referral to CTC
7.3 Development of CTC
7.3.1 Scanner Technology
7.3.2 Interpretation Methods
7.4 Evolution of the Technique