Multi-Energy CT in the Emergency Department (2026)-M7-CER1622-2026

Video Transcription

Video Summary

The transcript is a series of talks on dual-energy/multi-energy CT and its clinical uses across emergency radiology.<br /><br />The first speaker explains the physics behind dual-energy CT: different materials such as iodine and calcium attenuate x-rays differently at varying energy levels. This allows scanners to separate materials and create useful reconstructions like iodine maps, virtual non-contrast images, calcium/uric acid maps, and virtual monoenergetic images. He reviews scanner types including dual-source, rapid kV switching, dual-layer spectral detectors, rotate-rotate systems, and photon-counting CT.<br /><br />He then focuses on cancer patients in the emergency department, showing how dual-energy CT can better reveal metastatic disease, distinguish tumor from blood, identify active bleeding, clarify bowel obstruction causes, detect pancreatic masses, and reduce the need for follow-up imaging or additional CTA scans.<br /><br />The second talk discusses thoracic applications, especially pulmonary embolism. Dual-energy CT improves pulmonary artery visualization, adds perfusion imaging, helps assess PE severity, and can reveal mimics such as pulmonary artery sarcoma. It also aids in aortic imaging, endoleak detection, intramural hematoma, and some lung mass/nodule characterization.<br /><br />The third talk covers musculoskeletal uses: detecting bone marrow edema in occult fractures, evaluating ligaments and tendons, reducing metal artifact around orthopedic hardware, and identifying gout through uric acid mapping.<br /><br />The session ends with audience cases demonstrating dual-energy CT for stone composition, appendicitis perforation, GI bleeding, aortic hematoma, and dropped gallstones.

Keywords

dual-energy CT

multi-energy CT

emergency radiology

iodine maps

virtual non-contrast

pulmonary embolism

bone marrow edema

metal artifact reduction

gout uric acid mapping