Peristaltic Contrast Media Injection Improved Image Quality and Decreased Radiation and Contrast Dose When Compared With Direct Drive Injection During Liver Computed Tomography.
J Comput Assist Tomogr
; 44(2): 209-216, 2020.
Article
em En
| MEDLINE
| ID: mdl-32195799
ABSTRACT
PURPOSE:
The aim of this study was to compare hepatic vascular and parenchymal image quality between direct and peristaltic contrast injectors during hepatic computed tomography (HCT).METHODS:
Patients (n = 171) who underwent enhanced HCT and had both contrast media protocols and injector systems were included; group A direct-drive injector with fixed 100 mL contrast volume (CV), and group B peristaltic injector with weight-based CV. Opacification, contrast-to-noise ratio, signal-to-noise ratio, radiation dose, and CV for liver parenchyma and vessels in both groups were compared by paired t test and Pearson correlation. Receiver operating characteristic curve, visual grading characteristics, and Cohen κ were used.RESULTS:
Contrast-to-noise ratio compared with hepatic vein for functional liver, contrast-to-noise ratio was higher in group B (2.17 ± 0.83) than group A (1.82 ± 0.63); portal vein higher in group B (2.281 ± 0.96) than group A (2.00 ± 0.66). Signal-to-noise ratio for functional liver was higher in group B (5.79 ± 1.58 Hounsfield units) than group A (4.81 ± 1.53 Hounsfield units). Radiation dose and contrast media were lower in group B (1.98 ± 0.92 mSv) (89.51 ± 15.49 mL) compared with group A (2.77 ± 1.03 mSv) (100 ± 1.00 mL). Receiver operating characteristic curve demonstrated increased reader in group B (95% confidence interval, 0.524-1.0) than group A (95% confidence interval, 0.545-1.0). Group B had increased revenue up to 58% compared with group A.CONCLUSIONS:
Image quality improvement is achieved with lower CV and radiation dose when using peristaltic injector with weight-based CV in HCT.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doses de Radiação
/
Intensificação de Imagem Radiográfica
/
Tomografia Computadorizada por Raios X
/
Meios de Contraste
/
Fígado
Tipo de estudo:
Observational_studies
Limite:
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article