Multi-detector row CT scanning in Paleoanthropology at various tube current settings and scanning mode

摘要: The purpose of this study was to determine the optimal tube current setting and scanning mode for hominid fossil skull scanning, using multi-detector row computed tomography (CT). Four skulls (La Ferrassie 1, Abri Pataud CroMagnon 2 Cro-Magnon 3) were examined by CT scanner LightSpeed 16 (General Electric Medical Systems) with varying dose per section (160, 250, 300 mAs) (helical conventional). Image quality two-dimensional (2D) multiplanar reconstructions, three-dimensional (3D) reconstructions native images assessed four reviewers a four-point grading scale. An ANOVA (analysis variance) model used compare mean score each sequence overall according levels parameters. Compared helical (mean score=12.03), conventional technique showed sustained poor image score=4.17). With mode, we observed better at mAs than 160 in 3D sequences (P=0.03). Whereas images, reduction effective induced no degradation (P=0.05). Our suggests standardized protocol 16×0.625 detector configuration, 10 mm beam collimation, 0.562:1 acquisition 0.625/0.4 slice thickness/reconstruction interval, pitch 5.62, 120 kV especially when is required.