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Medical Imaging by Kris Iniewski, Troy Farncombe

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7Four-Dimensional Computed Tomography

Tinsu Pan

CONTENTS

7.1 Introduction

7.2 4DCT Data Acquisition

7.2.1 Data Sufficiency Condition (DSC)

7.2.2 Data Acquisition Modes

7.2.3 Image Location, Slice Thickness, and Scan Time

7.2.4 Work Flow and Phase Selection Accuracy

7.2.5 Commercial Helical 4DCT Systems

7.2.6 Respiratory Monitoring Devices

7.2.7 Image Artifacts

7.2.8 Average CT (ACT) and Maximum Intensity Projection (MIP) CT

7.2.9 Conclusions and Future Directions

References

7.1 Introduction

Respiratory motion imposes a significant challenge in radiation therapy of the lung tumor. Because most of the patients are treated in free-breathing, the information of tumor motion is critical for the radiation oncologist to delineate the target tumor. ...

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