Buscar en
Radiología (English Edition)
Toda la web
Inicio Radiología (English Edition) Comparison of image quality and radiation dose in computed tomography angiograph...
Journal Information
Vol. 56. Issue 6.
Pages 541-547 (November - December 2014)
Share
Share
Download PDF
More article options
ePub
Visits
1791
Vol. 56. Issue 6.
Pages 541-547 (November - December 2014)
Original article
DOI: 10.1016/j.rxeng.2012.06.006
Comparison of image quality and radiation dose in computed tomography angiography of the peripheral arteries using tube voltage of 80kV versus 100kV
Comparación de la calidad de imagen y dosis de radiación en angio-tomografía computarizada de arterias periféricas con 80 y 100kV
Visits
...
R. Oca Pernas
Corresponding author
, C. Delgado Sánchez-Gracián, G. Tardáguila de la Fuente, A. Fernández del Valle, N. Silva Priegue, M. González Vázquez, C. Trinidad López
Servicio de Radiodiagnóstico, Hospital POVISA, Vigo, Pontevedra, Spain
Article information
Abstract
Full Text
Bibliography
Download PDF
Statistics
Figures (2)
Tables (2)
Table 1. Characteristics of patients and parameters of acquisition.
Table 2. Measurements of vascular density, subjective quality of image and radiation dose.
Show moreShow less
Abstract
Objective

To compare the image quality and dose of radiation in two groups of patients undergoing CT angiography of the lower limbs, one with tube voltage of 80kV and the other with tube voltage of 100kV.

Materials and methods

We performed CT angiography of the lower limbs in 60 patients with suspected peripheral arterial disease. Patients were randomly assigned to one of the two groups; in one group, CT angiography was performed using a tube voltage of 80kV, whereas in the other it was performed using 100kV. The remaining acquisition parameters were the same in both groups. The images were analyzed by quantifying vascular density (VD) and noise (N) and by calculating the quotients density/noise (QVDN) and contrast/noise (QCN). Two radiologists working independently evaluated the subjective quality of the images. We calculated the estimated effective dose (EED) based on the dose-length product (DLP).

Results

In the group studied at 80kV, VD was significantly higher (462.5UH±95.6 vs 372UH±100.9; P<.001), QVDN was significantly higher (241.9±48.1 vs 194.3±49.6; P<.001), and there were trends toward higher N (21.3UH±13 vs 16.3UH±3.5; P=.098) and toward higher QCN (21.4±12.1 vs 22.9±9.1; P=.15). No significant differences were found in the subjective quality of the images. The EED was significantly lower in the group studied at 80kV (4.73mSv±1.1 vs 9.6mSv±2.2; P<.001).

Conclusion

Using 80kV instead of 100kV for CT angiography of the lower limbs reduces the dose of radiation without affecting the diagnostic efficacy of the study.

Keywords:
Peripheral arterial disease
Multidetector computed tomography
Dose of radiation
Resumen
Objetivo

Comparar la calidad de imagen y la dosis de radiación en 2 grupos de pacientes a los que se realiza angio-TC de extremidades inferiores con 80 y 100kV.

Material y métodos

Se realizó angio-TC de miembros inferiores a 60 pacientes con sospecha de enfermedad arterial periférica aleatorizados en 2 grupos, en uno la TC se realizó con 80kV y en el otro con 100kV. Los demás parámetros de adquisición se mantuvieron constantes. Se analizaron las imágenes cuantificando la densidad vascular (DV) y el ruido (R), y se calcularon los cocientes densidad vascular/ruido (CDVR) y contraste/ruido (CCR). Dos radiólogos evaluaron independientemente la calidad subjetiva de las imágenes. Se calculó la dosis efectiva estimada (DEE) basada en el producto dosis-longitud (DLP).

Resultados

El grupo de 80kV presentó valores significativamente más elevados de la DV (462,5UH±95,6 vs. 372UH±100,9; p<0,001) y del CDVR (241,9±48,1 vs. 194,3±49,6; p<0,001) y diferencias no significativas del R (21,3UH±13 vs. 16,3UH±3,5; p=0,098) y el CCR (21,4±12,1 vs. 22,9±9,1; p=0,15). No hubo diferencias significativas en la calidad subjetiva de la imagen y la dosis efectiva fue significativamente menor en el grupo de 80kV (4,73mSv±1,1 vs. 9,6mSv±2,2; p<0,001).

Conclusión

La utilización de 80kV en el estudio de angio-TC de miembros inferiores disminuye la dosis de radiación sin afectar a la eficacia diagnóstica del estudio respecto a la utilización de 100kV.

Palabras clave:
Enfermedad arterial periférica
Tomografía computarizada multidetector
Dosis de radiación

Article

These are the options to access the full texts of the publication Radiología (English Edition)
Subscriber
Subscriber

If you already have your login data, please click here .

If you have forgotten your password you can you can recover it by clicking here and selecting the option “I have forgotten my password”
Purchase
Purchase article

Purchasing article the PDF version will be downloaded

Price 19.34 €

Purchase now
Contact
Phone for subscriptions and reporting of errors
From Monday to Friday from 9 a.m. to 6 p.m. (GMT + 1) except for the months of July and August which will be from 9 a.m. to 3 p.m.
Calls from Spain
932 415 960
Calls from outside Spain
+34 932 415 960
E-mail
Article options
Tools
es en pt

¿Es usted profesional sanitario apto para prescribir o dispensar medicamentos?

Are you a health professional able to prescribe or dispense drugs?

Você é um profissional de saúde habilitado a prescrever ou dispensar medicamentos