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- Image quality assessment of head CT: Control charts as an useful instrumentPublication . Guiomar, Joana Reis; Ribeiro, Luís Pedro; Ribeiro, Anabela; Abrantes, António; Pinheiro, João; Almeida, Rui; Azevedo, KevinThemain objective of this research was to determine if the diagnostic image, acquired by CT scan, meets the quality criteria previously established for head CT exams. A total of 360 Head Computed Tomography exams were analyzed, using a checklist. For data collection, quality criteria were created, organized into four criteria groups, consisting of multiple items that must appear in the images studies. After data processing, a large number of non-conformexaminations were identified in than more than 50% of the sample. We concluded the main causes of these results are: the “incorrect or incomplete positioning”, the "lack of name of the radiographer and “motion artefacts”. Therefore it is essential to implement a checklist for a systematic evaluationof procedures.