Comparison of image quality of shoulder CT arthrography conducted using 120 kVp and 140 kVp protocols.
Korean J Radiol
; 15(6): 739-45, 2014.
Article
em En
| MEDLINE
| ID: mdl-25469085
ABSTRACT
OBJECTIVE:
To compare the image quality of shoulder CT arthrography performed using 120 kVp and 140 kVp protocols. MATERIALS ANDMETHODS:
Fifty-four CT examinations were prospectively included. CT scans were performed on each patient at 120 kVp and 140 kVp; other scanning parameters were kept constant. Image qualities were qualitatively and quantitatively compared with respect to noise, contrast, and diagnostic acceptability. Diagnostic acceptabilities were graded using a one to five scale as follows 1, suboptimal; 2, below average; 3, acceptable; 4, above average; and 5, superior. Radiation doses were also compared.RESULTS:
Contrast was better at 120 kVp, but noise was greater. No significant differences were observed between the 120 kVp and 140 kVp protocols in terms of diagnostic acceptability, signal-to-noise ratio, or contrast-to-noise ratio. Lowering tube voltage from 140 kVp to 120 kVp reduced the radiation dose by 33%.CONCLUSION:
The use of 120 kVp during shoulder CT arthrography reduces radiation dose versus 140 kVp without significant loss of image quality.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Ombro
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Tomografia Computadorizada por Raios X
Tipo de estudo:
Guideline
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Observational_studies
Limite:
Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article