<International Circulation>: MDCT has a high radiation dose. Also， radiation dose during PCI for CTO is quite high. Therefore， we would like to know how to avoid radiation injuries for patients with CTO?
Prof. Kyo: After MDCT became available we usually use MDCT before conducting a CTO procedure. It can give us more information on the characteristics of the CTO lesion such as hardness or the course of the vessel. As a result， it can help the operator to shorten the procedure. Thus， if you can shorten the procedure time you can lessen the radiation exposure.
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