MDCT arthrography of the hip: value of the adaptive statistical iterative reconstruction technique and potential for radiation dose reduction.

Détails

ID Serval
serval:BIB_B7B00D1A9B80
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
MDCT arthrography of the hip: value of the adaptive statistical iterative reconstruction technique and potential for radiation dose reduction.
Périodique
AJR. American journal of roentgenology
Auteur(s)
Tobalem F., Dugert E., Verdun F.R., Dunet V., Ott J.G., Rudiger H.A., Cherix S., Meuli R., Becce F.
ISSN
1546-3141 (Electronic)
ISSN-L
0361-803X
Statut éditorial
Publié
Date de publication
12/2014
Peer-reviewed
Oui
Volume
203
Numéro
6
Pages
W665-73
Langue
anglais
Notes
Publication types: Journal Article ; Randomized Controlled Trial
Publication Status: ppublish
Résumé
The purpose of this article is to assess the effect of the adaptive statistical iterative reconstruction (ASIR) technique on image quality in hip MDCT arthrography and to evaluate its potential for reducing radiation dose.
Thirty-seven patients examined with hip MDCT arthrography were prospectively randomized into three different protocols: one with a regular dose (volume CT dose index [CTDIvol], 38.4 mGy) and two with a reduced dose (CTDIvol, 24.6 or 15.4 mGy). Images were reconstructed using filtered back projection (FBP) and four increasing percentages of ASIR (30%, 50%, 70%, and 90%). Image noise and contrast-to-noise ratio (CNR) were measured. Two musculoskeletal radiologists independently evaluated several anatomic structures and image quality parameters using a 4-point scale. They also jointly assessed acetabular labrum tears and articular cartilage lesions.
With decreasing radiation dose level, image noise statistically significantly increased (p=0.0009) and CNR statistically significantly decreased (p=0.001). We also found a statistically significant reduction in noise (p=0.0001) and increase in CNR (p≤0.003) with increasing percentage of ASIR; in addition, we noted statistically significant increases in image quality scores for the labrum and cartilage, subchondral bone, overall diagnostic quality (up to 50% ASIR), and subjective noise (p≤0.04), and statistically significant reductions for the trabecular bone and muscles (p≤0.03). Regardless of the radiation dose level, there were no statistically significant differences in the detection and characterization of labral tears (n=24; p=1) and cartilage lesions (n=40; p≥0.89) depending on the ASIR percentage.
The use of up to 50% ASIR in hip MDCT arthrography helps to reduce radiation dose by approximately 35-60%, while maintaining diagnostic image quality comparable to that of a regular-dose protocol using FBP.

Mots-clé
Adult, Aged, Algorithms, Arthrography/methods, Data Interpretation, Statistical, Feasibility Studies, Hip Joint/diagnostic imaging, Humans, Joint Diseases/diagnostic imaging, Middle Aged, Multidetector Computed Tomography/methods, Radiation Dosage, Radiation Protection/methods, Radiographic Image Enhancement, Radiographic Image Interpretation, Computer-Assisted, Reproducibility of Results, Sensitivity and Specificity, CT arthrography, hip, image quality, iterative reconstruction, radiation dose
Pubmed
Web of science
Création de la notice
25/11/2014 11:45
Dernière modification de la notice
20/08/2019 15:25
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