Yukiko Honda MD, Presenter: Nothing to Disclose

Toru Higaki PhD, Abstract Co-Author: Nothing to Disclose

Yoko Kaichi, Abstract Co-Author: Nothing to Disclose

Chihiro Tani MD, Abstract Co-Author: Nothing to Disclose

Akira Taniguchi RT, Abstract Co-Author: Employee, Toshiba Corporation

Kazuo Awai MD, Abstract Co-Author: Research Grant, Toshiba Corporation Research Grant, Hitachi Ltd Research Grant, Bayer AG Research Consultant, DAIICHI SANKYO Group Research Grant, Eisai Co, Ltd

Daisuke Komoto MD, Abstract Co-Author: Nothing to Disclose

We focus on a new CTU method that uses split bolus injection and dual-energy CT (DECT) technology. It facilitates the simultaneous acquisition of nephrographic- and excretory-phase scans and helps to reduce radiation exposure. Applying DECT techniques to split bolus injection allows a further radiation dose reduction at CTU by generating virtual non-enhanced images and save actual non-enhanced scan. Virtual monochromatic CT images generated from DECT can reduce beam hardening artifacts induced by iodinated urine and may help to identify subtle enhancements or small tumors in the ureter wall.

1. Current scan- and contrast injection protocol for CTU 2. New technologies for CTU a) Dual energy CT (DECT) - Principles of DECT - Utility and limitations of DECT for diagnosing ureter calculi and tumors b) Iterative reconstruction (IR) - Principles of IR - Improvement of CTU image quality by IR - Radiation dose reduction at CTU by IR 3. Proposed CTU protocol using new technologies -CTU using split bolus injection and DE technology 4. Future perspective of CTU  

http://abstract.rsna.org/uploads/2014/14006660/14006660_kyzb.pdf

Honda, Y, Higaki, T, Kaichi, Y, Tani, C, Taniguchi, A, Awai, K, Komoto, D, CT Urography (CTU) Using New CT Technologies: Clinical Advantages of a Proposed Scan and Contrast Injection Protocol.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14006660.html