Effect of a noise-optimized virtual monoenergetic reconstruction technique on dual-energy CT for image quality of inflammatory bowel disease / 中南大学学报(医学版)
Journal of Central South University(Medical Sciences)
;
(12): 875-881, 2018.
Article
Dans Chinois
| WPRIM
| ID: wpr-813181
ABSTRACT
To assess the value of noise-optimized virtual monoenergetic imaging (VMI+) reconstruction technique on objective and subjective image quality in patients with inflammatory bowel disease (IBD) undergoing abdominal dual-energy computed tomography (DECT).
Methods:
Datasets from 32 patients (22 men, 10 women) with IBD, who underwent abdominal DECT, were reconstructed by using the standard linearly blended (M_0.6), traditional monoenergetic (VMI) and VMI+ algorithms in 10-keV intervals from 40-100 keV. Attenuation in IBD lesions was measured to perform objective evaluation using signal-to-noise (SNR) and contrast-to-noise ratios (CNR). Subjective evaluation was performed by 3 independent blinded radiologists using 5-point Likert scales. The overall image quality, image sharpness, lesion delineation, and image noise were analyzed.Results:
Mean SNR and CNR peaked at 40 keV VMI+ series (SNR 8.28±2.34, CNR 5.10±2.10) and they were significantly higher than those in linearly blended (SNR 5.82±1.44, CNR 1.53±0.86) and all VMI series (all P<0.01). Subjective image parameter was the highest for the 50 keV VMI+ series regarding overall image quality (mean 4.80, all P<0.01). The highest image sharpness scores were observed at 40 and 50 keV VMI+ reconstructions (mean 4.14 and 4.25, respectively; P=0.415). VMI+ series at 40 keV provided the highest lesion delineation (mean 4.52, all P<0.01). Image noise was low at the 100 keV VMI+ and VMI series (mean 4.58 and 4.40, respectively; P≥0.11).Conclusion:
Low-keV VMI+ reconstructions improves SNR, CNR, and subjective image quality significantly in patients with IBD.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Imagerie diagnostique
/
Interprétation d'images radiographiques assistée par ordinateur
/
Maladies inflammatoires intestinales
/
Tomodensitométrie
/
Radiographie digitale par projection en double énergie
/
Reproductibilité des résultats
/
Études rétrospectives
/
Rapport signal-bruit
/
Méthodes
Type d'étude:
Etude diagnostique
/
Étude observationnelle
Limites du sujet:
Femelle
/
Humains
/
Mâle
langue:
Chinois
Texte intégral:
Journal of Central South University(Medical Sciences)
Année:
2018
Type:
Article
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