CT Radiation Dose Falls 22% Over Past Decade, Nationwide Survey Shows

CT radiation dose has dropped markedly over the past decade in the U.S., according to a new nationwide survey. Overall dose fell 22% (CTDIvol) and 20% (dose-length product), with chest CT showing the largest reductions (−31% with contrast). New lower achievable dose benchmarks s…

• Updated survey of 5.2 million CT exams at 592 U.S. facilities, four times larger than the 2014 benchmark study.
• Newly established achievable dose benchmarks are in some cases up to 19% lower than 2014 targets, providing updated optimization goals.
• Head CT without contrast showed the smallest dose reduction at 3.5%, indicating an area for continued effort.

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