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- W2335962079 abstract "BACKGROUND AND PURPOSE: The American College of Radiology–American Society of Neuroradiology–Society for Pediatric Radiology Practice Parameter for a neck CT suggests that coverage should be from the sella to the aortic arch. It also recommends using CT scans judiciously to achieve the clinical objective. Our purpose was to analyze the potential dose reduction by decreasing the scan length of a neck CT and to assess for any clinically relevant information that might be missed from this modified approach. MATERIALS AND METHODS: This retrospective study included 126 children who underwent a neck CT between August 1, 2013, and September 30, 2014. Alteration of the scan length for the modified CT was suggested on the topographic image on the basis of the indication of the study, with the reader blinded to the images and the report. The CT dose index volume of the original scan was multiplied by the new scan length to calculate the dose-length product of the modified study. The effective dose was calculated for the original and modified studies by using age-based conversion factors from the American Association of Physicists in Medicine Report No. 96. RESULTS: Decreasing the scan length resulted in an average estimated dose reduction of 47%. The average reduction in scan length was 10.4 cm, decreasing the overall coverage by 48%. The change in scan length did not result in any missed findings that altered management. Of the 27 abscesses in this study, none extended to the mediastinum. All of the lesions in question were completely covered. CONCLUSIONS: Decreasing the scan length of a neck CT according to the indication provides a significant savings in radiation dose, while not altering diagnostic ability or management." @default.
- W2335962079 created "2016-06-24" @default.
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- W2335962079 date "2016-02-11" @default.
- W2335962079 modified "2023-09-23" @default.
- W2335962079 title "Radiation Dose Reduction by Indication-Directed Focused z-Direction Coverage for Neck CT" @default.
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- W2335962079 doi "https://doi.org/10.3174/ajnr.a4672" @default.
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