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Advances and Applications of Dual Energy CT and CBCT for Radiation Therapy

X Li1*, C Hua2*, S Swerdloff3*, (1) Medical College of Wisconsin, Milwaukee, WI, (2) St. Jude Childrens Research Hospital, Memphis, TN, (3) Elekta, Pty, Dunedin, Otago


(Monday, 7/30/2018) 7:30 AM - 8:25 AM

Room: Davidson Ballroom A

The concept of dual energy computed tomography (CT) was described by Hounsfield in 1973. However, the technology was not mature for commercialization until 2006. Since then, many radiology departments have embraced this technology and showed clinical values in a variety of diagnostic applications. Dual energy CT has several exciting potentials for radiation therapy, including contrast material quantification, reduction of iodine contrast load, virtual non-contrast scans, metal artifact reduction, tumor and normal tissue characterization, therapy response assessment, and improvement of dose calculation by direct calculation of electron density and effective atomic number. Several radiation oncology departments have started to utilize dual energy CT scanners in the last 5 years and many promising results were reported. On a related topic, dual energy cone beam CT (CBCT) has been shown in research to excel in metal artifact reduction, soft tissue contrast enhancement, and estimation of proton stopping power. These applications address challenges faced by current clinical CBCT systems. This course will provide therapy physicists fresh update about technological advancements, clinical implementation, clinical applications of dual energy CT and CBCT systems, and challenges and opportunities.

Learning Objectives:
1. Be updated on the latest innovations of dual energy CT and dual energy CBCT systems.
2. Understand the potentials and challenges of dual energy CT and dual energy CBCT for radiation therapy.
3. Learn about clinical implementation and research opportunities for medical physicists.

Funding Support, Disclosures, and Conflict of Interest: CH receives research support from Philips Healthcare. SS is an employee of Elekta AB. Medical College of Wisconsin receives research support from Siemens Medical and Elekta AB.



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