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Title of Journal: Radiol med

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Abbravation: La radiologia medica

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Springer Milan

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DOI

10.1002/hlca.201000011

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1826-6983

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Dose levels and image quality of secondgeneration

Authors: Julian L Wichmann Xiaohan Hu Alexander Engler J Matthias Kerl Martin Beeres Claudia Frellesen Wolfgang Luboldt Thomas J Vogl Ralf W Bauer Thomas Lehnert
Publish Date: 2015/05/16
Volume: 120, Issue: 12, Pages: 1112-1121
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Abstract

We retrospectively analyzed data from four groups with 25 patients each examined by one of the following DSCT cCTA protocols prospectively ECGgated highpitch group 1 or sequential group 2 acquisition retrospectively ECGgated acquisition in dualenergy DECT group 3 or dualsource group 4 mode CT dose index volume dose length product estimated radiation dose contrasttonoise and signaltonoiseratios were compared Subjective image quality was rated by two observers blinded to the protocolsHighpitch DSCT showed a mean estimated radiation dose of 127 ± 062 mSv significantly p  001 lower than sequential 204 ± 094 mSv dualenergy 397 ± 129 mSv or dualsource 811 ± 495 mSv acquisition Image noise showed no statistical difference p  091 ranging from 152 ± 44 group 2 up to 245 ± 220 group 4 Each protocol showed diagnostic image quality in at least 981  of evaluated coronary segments without significant differences p  005Prospectively ECGgated DSCT protocols enable cCTA with significant dose reduction and consistently diagnostic image quality In patients requiring retrospectively ECGgated DSCT for functional analysis or due to arrhythmia dualenergy mode should be preferred over dualsource mode as it significantly decreases estimated dose without compromising image quality

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