Low-dose computed tomography of the chest using iterative reconstruction versus filtered back projection: comparison of image quality.
J Comput Assist Tomogr
; 36(5): 512-7, 2012.
Article
en En
| MEDLINE
| ID: mdl-22992598
OBJECTIVE: The purpose of this study was to compare image quality of iterative reconstruction (IR) to filtered back projection (FBP) in low-dose computed tomography of the chest. METHODS: Forty-three consecutive patients were retrospectively enrolled. Eight series of images were reconstructed using FBP and 7 levels of IR in each subject. Image noise, signal-to-noise ratio (SNR), and SNR improvement were measured. Two radiologists evaluated subjective artifact, image artificiality, and subjective overall image quality with 4- or 5-point scales. RESULTS: Iterative reconstruction showed significantly lower image noise (135.5 ± 36.6 vs 219.9 ± 40.9) and higher SNR (0.36 ± 0.12 vs 0.21 ± 0.05) than FBP (P < 0.001). Signal-to-noise ratio improvement was 72.4% ± 44.9%. Subjective artifact of FBP was significantly higher than IR images (P < 0.001). Image artificiality of IR was significantly higher than that of FBP (P < 0.001). Overall, subjective image quality was poor in FBP and acceptable or good in IR. CONCLUSIONS: With the use of IR, low-dose computed tomography of the chest would achieve less image noise and better image quality compared to the FBP.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Radiografía Torácica
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Interpretación de Imagen Radiográfica Asistida por Computador
/
Tomografía Computarizada por Rayos X
Tipo de estudio:
Observational_studies
Límite:
Adolescent
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Adult
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Aged
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Child
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
J Comput Assist Tomogr
Año:
2012
Tipo del documento:
Article
Pais de publicación:
Estados Unidos