In plain language
In head phantom measurements on one biplane system, a filtered region-of-interest mode (Spot ROI) lowered patient dose indicators, especially during digital subtraction angiography (DSA), compared with spot fluoroscopy and conventional collimation. Staff dose was not measured.
At a glance
- Type of study
- Original research, Phantom or simulation study
- Who was studied
- Phantom or simulation (no people)
- Summary based on
- the full text
What it found
For fluoroscopy plus DSA combined, Spot ROI gave the lowest air kerma, dose-area product (DAP) and peak skin dose at every field of view.
Key figures: FOV 20 cm total DAP 614.87 vs 2631.06 (Spot F) vs 2690.84 cGycm2 (CC); PSD 158 vs 195 vs 214 mGy
During DSA, Spot ROI DAP was a quarter or less of that for Spot F and conventional collimation.
Key figures: 26.4% (11 cm), 24.9% (15 cm), 16.5% (20 cm) of Spot F/CC DAP
During DSA, Spot ROI peak skin dose was about half to three-quarters of that with Spot F and CC.
Key figures: 51.5% (11 cm), 66.7% (15 cm), 75.6% (20 cm)
In fluoroscopy, Spot ROI air kerma was lower than Spot F and CC at all fields of view, though DAP was higher than Spot F at 15 and 20 cm FOV because a larger area was exposed.
Key figures: Air kerma (AK) at 20 cm FOV: 25.1% of Spot F, 16.9% of CC
In fluoroscopy, peak skin dose was similar for Spot F and Spot ROI and lower than for conventional collimation.
Key figures: FOV 11 cm: 56 mGy (Spot F), 59 mGy (Spot ROI), 70 mGy (CC)
Limits to keep in mind
Single phantom measurement per condition on one vendor system with no statistics, no clinical cases and no staff dosimetry; one author is a Canon employee and the site is a Canon reference site.
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How this summary was made
ORSIF prepared this summary with AI assistance from the full text of the paper. A program then checked that the passage supporting each finding appears word for word in that source. A person has not yet reviewed each summary, so read the original before relying on a number. ORSIF summarizes research and does not endorse any product or company. Report a problem with this summary.
Prepared November 3, 2026.