Haruhiko Machida MD, Presenter: Nothing to Disclose

Isao Tanaka, Abstract Co-Author: Nothing to Disclose

Rika Fukui, Abstract Co-Author: Nothing to Disclose

Yun Shen PhD, Abstract Co-Author: Employee, General Electric Company Researcher, General Electric Company

Takuya Ishikawa, Abstract Co-Author: Nothing to Disclose

Eiko Ueno MD, Abstract Co-Author: Nothing to Disclose

Etsuko Tate, Abstract Co-Author: Nothing to Disclose

He Qing Wang MSc, Abstract Co-Author: Nothing to Disclose

To review limitations of conventional CT angiography (CTA) To describe basic principles and various techniques in single-source dual-energy CT (DECT) with fast kVp switching to overcome these limitations To illustrate various clinical applications and advantages using these techniques by presenting clinical images  

Limitations of conventional CTA Iodine contrast medium (CM)/radiation dose Insufficient vessel contrast enhancement (CE) Severe calcification Limited tissue characterization/perfusion assessment Metallic/beam-hardening (BH) artifacts Basic principles & various techniques in DECT BH correction Monochromatic imaging (MI) Material density imaging (MDI) Energy level (keV)-CT value (HU) curve Effective atomic number (Z) histogram Iterative reconstruction (IR) Various clinical applications & advantages CM dose reduction/improved vessel CE: low-keV MI/iodine (water) MDI with IR Radiation dose reduction: water (iodine) MDI replacing non-CE CT/IR Calcium reduction: iodine (calcium/hydroxyapatite) MDI Lipid-rich plaque detection: fat (water) MDI/keV-HU curve/effective Z histogram Differentiation among CM, calcification, fresh hematoma: MDI Tissue perfusion assessment: iodine (water) MDI  

http://abstract.rsna.org/uploads/2014/14018626/14018626_xq9t.pdf

Machida, H, Tanaka, I, Fukui, R, Shen, Y, Ishikawa, T, Ueno, E, Tate, E, Wang, H, Clinical Applications of Single-source Dual-energy CT with Fast kVp Switching in CT Angiography: What the Radiologist Needs to Know.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14018626.html