Multi-detector row CT scanning in Paleoanthropology at various tube current settings and scanning mode.
J. Badawi-Fayad
(1, 2)
,
Chadi Yazbeck
(3)
,
Antoine Balzeau
(4, 2)
,
T. Nguyen
(1)
,
A. Istoc
(1)
,
D. Grimaud-Hervé
(4, 2)
,
E. A. Cabanis
(1)
J. Badawi-Fayad
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- Fonction : Auteur correspondant
- PersonId : 838403
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Antoine Balzeau
- Fonction : Auteur
- PersonId : 174475
- IdHAL : antoine-balzeau
- ORCID : 0000-0002-4226-611X
- IdRef : 096255757
Résumé
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 fossil skulls (La Ferrassie 1, Abri Pataud 1, CroMagnon 2 and Cro-Magnon 3) were examined by using the CT scanner LightSpeed 16 (General Electric Medical Systems) with varying dose per section (160, 250, and 300 mAs) and scanning mode (helical and conventional). Image quality of two-dimensional (2D) multiplanar reconstructions, three-dimensional (3D) reconstructions and native images was assessed by four reviewers using a four-point grading scale. An ANOVA (analysis of variance) model was used to compare the mean score for each sequence and the overall mean score according to the levels of the scanning parameters. Compared with helical CT (mean score=12.03), the conventional technique showed sustained poor image quality (mean score=4.17). With the helical mode, we observed a better image quality at 300 mAs than at 160 in the 3D sequences (P=0.03). Whereas in native images, a reduction in the effective tube current induced no degradation in image quality (P=0.05). Our study suggests a standardized protocol for fossil scanning with a 16 x 0.625 detector configuration, a 10 mm beam collimation, a 0.562:1 acquisition mode, a 0.625/0.4 mm slice thickness/reconstruction interval, a pitch of 5.62, 120 kV and 300 mAs especially when a 3D study is required.
Format du dépôt | Notice |
---|---|
Type de dépôt | Article dans une revue |
Titre |
en
Multi-detector row CT scanning in Paleoanthropology at various tube current settings and scanning mode.
|
Résumé |
en
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 fossil skulls (La Ferrassie 1, Abri Pataud 1, CroMagnon 2 and Cro-Magnon 3) were examined by using the CT scanner LightSpeed 16 (General Electric Medical Systems) with varying dose per section (160, 250, and 300 mAs) and scanning mode (helical and conventional). Image quality of two-dimensional (2D) multiplanar reconstructions, three-dimensional (3D) reconstructions and native images was assessed by four reviewers using a four-point grading scale. An ANOVA (analysis of variance) model was used to compare the mean score for each sequence and the overall mean score according to the levels of the scanning parameters. Compared with helical CT (mean score=12.03), the conventional technique showed sustained poor image quality (mean score=4.17). With the helical mode, we observed a better image quality at 300 mAs than at 160 in the 3D sequences (P=0.03). Whereas in native images, a reduction in the effective tube current induced no degradation in image quality (P=0.05). Our study suggests a standardized protocol for fossil scanning with a 16 x 0.625 detector configuration, a 10 mm beam collimation, a 0.562:1 acquisition mode, a 0.625/0.4 mm slice thickness/reconstruction interval, a pitch of 5.62, 120 kV and 300 mAs especially when a 3D study is required.
|
Auteur(s) |
J. Badawi-Fayad
1, 2
, Chadi Yazbeck
3
, Antoine Balzeau
4, 2
, T. Nguyen
1
, A. Istoc
1
, D. Grimaud-Hervé
4, 2
, E. A. Cabanis
1
1
Departement de neuro-radiologie
( 30545 )
- 28 rue de Charenton, 75572 Paris cedex 12
- France
2
Département de Préhistoire
( 399940 )
- Institut de Paléontologie Humaine - 1 rue René Panhard - 75013 Paris
- France
3
Epidémiologie et Biostatistique
( 17148 )
- Hôpital Paul Brousse 16 av Paul Vaillant Couturier 94807 VILLEJUIF CEDEX
- France
4
HNHP -
Histoire naturelle de l'Homme préhistorique
( 121947 )
- Institut de Paléontologie Humaine - 1, rue René Panhard - 75013 Paris
- France
|
Comité de lecture |
Oui
|
Vulgarisation |
Non
|
Langue du document |
Anglais
|
Nom de la revue |
|
Audience |
Internationale
|
Date de publication |
2005-12
|
Date de publication électronique |
2005-10-07
|
Volume |
27
|
Numéro |
6
|
Page/Identifiant |
536-43
|
Domaine(s) |
|
Mots-clés (Mesh) |
|
Mots-clés |
en
Computed tomography, Multi-detectorrow, Fossil skulls, Paleoanthropology
|
DOI | 10.1007/s00276-005-0041-4 |
Pubmed Id | 16211320 |
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