On October 8, 2009, the US Food and Drug Administration (FDA) issued an initial notification regarding a safety investigation of facilities performing brain perfusion CT (PCT) scans. This alert indicated that the FDA had become aware of radiation overexposures during PCT imaging performed to
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Wintermark et al. (2009) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: