Helical vs Conventional CT in Routine Head Imaging. A Comparison of Dose and Image Quality using VGC Analysis

Abstract

Citation: Dousi M, Fatsi A, Sotirakou K, Gkatzia N, Patelarou M, Theodosiou A. Helical vs Conventional CT in Routine Head Imaging. A Comparison of Dose and Image Quality using VGC Analysis. Journal of Radiology and Clinical Imaging 4 (2021): 036-049. Abstract Purpose: To compare and evaluate the sequencial and helical head CT imaging acquisition nodes in terms of patient dose and image quality. Material and Methods: Sixty patients were studied in total for one week from July 2018 to July 2019 and all underwent two head CT exams. The first time a conventional technique was used and the other one the helical technique. Scan parameters and dose indices were recorded on a checklist at the end of each examination. The images were rated by three radiologists according to the criteria of the European Guidelines on Quality Criteria for Computed Tomography. Results: Mann-Whitney U test showed that both dose indicators CTDI vol and DLP were statistically higher (p<0.05) in helical (Mean CTDI vol =34.15, Mean DLP=532.47) than in conventional scanning mode (Mean CTDI vol =31.73, Mean DLP=464.91). According to our