Radiation Dose Optimization in Pediatric Chest CT: Major Indicators of Dose Exposure in 1695 CT Scans over Seven Years.
Rofo
; 190(12): 1131-1140, 2018 Dec.
Article
em En
| MEDLINE
| ID: mdl-30308691
ABSTRACT
PURPOSE:
To analyze possible influencing factors on radiation exposure in pediatric chest CT using different approaches for radiation dose optimization and to determine major indicators for dose development. MATERIALS ANDMETHODS:
In this retrospective study at a clinic with maximum care facilities including pediatric radiology, 1695 chest CT examinations in 768 patients (median age 10 years; range 2 days to 17.9 years) were analyzed. Volume CT dose indices, effective dose, size-specific dose estimate, automatic dose modulation (AEC), and high-pitch protocols (pitch ≥â3.0) were evaluated by univariate analysis. The image quality of low-dose examinations was compared to higher dose protocols by non-inferiority testing.RESULTS:
Median dose-specific values annually decreased by an average of 12â%. High-pitch mode (nâ=â414) resulted in lower dose parameters (pâ<â0.001). In unenhanced CT, AEC delivered higher dose values compared to scans with fixed parameters (pâ<â0.001). In contrast-enhanced CT, the use of AEC yielded a significantly lower radiation dose only in patients older than 16 years (pâ=â0.04). In the age group 6 to 15 years, the values were higher (pâ<â0.001). The diagnostic image quality of low-dose scans was non-inferior to high-dose scans (2.18 vs. 2.14).CONCLUSION:
Radiation dose of chest CT was reduced without loss of image quality in the last decade. High-pitch scanning was an independent factor in this context. Dose reduction by AEC was limited and only relevant for patients over 16 years. KEY POINTS · The radiation dose of pediatric chest CT was reduced in the last decade.. · High-pitch scanning is an independent factor of dose optimization.. · Dose reduction by AEC is limited and only relevant for older children.. CITATION FORMAT · Esser M, Hess S, Teufel M etâal. Radiation Dose Optimization in Pediatric Chest CT Major Indicators of Dose Exposure in 1695 CT Scans over Seven Years. Fortschr Röntgenstr 2018; 190 1131â-â1140.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Doses de Radiação
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Radiografia Torácica
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Tomografia Computadorizada por Raios X
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Exposição à Radiação
Tipo de estudo:
Guideline
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Observational_studies
Limite:
Adolescent
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Child
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Child, preschool
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Female
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Humans
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Infant
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Male
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Newborn
País como assunto:
Europa
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article