Improved assessment of mediastinal and pulmonary pathologies in combined staging CT examinations using a fast-speed acquisition dual-source CT protocol.
Eur Radiol
; 27(12): 4931-4940, 2017 Dec.
Article
em En
| MEDLINE
| ID: mdl-28677055
ABSTRACT
OBJECTIVES:
To demonstrate the feasibility of fast Dual-Source CT (DSCT) and to evaluate the clinical utility in chest/abdomen/pelvis staging CT studies.METHODS:
45 cancer patients with two follow-up combined chest/abdomen/pelvis staging CT examinations (maximally ±10 kV difference in tube potential) were included. The first scan had to be performed with our standard protocol (fixed pitch 0.6), the second one using a novel fast-speed DSCT protocol (fixed pitch 1.55). Effective doses (ED) were calculated, noise measurements performed. Scan times were compared, motion artefacts and the diagnostic confidence rated in consensus reading.RESULTS:
ED for the standard and fast-speed scans was 9.1 (7.0-11.1) mSv and 9.2 (7.4-12.8) mSv, respectively (P = 0.075). Image noise was comparable (abdomen; all P > 0.05) or reduced for fast-speed CTs (trachea, P = 0.001; ascending aorta, P < 0.001). Motion artefacts of the heart/the ascending aorta (all P < 0.001) and breathing artefacts (P < 0.031) were reduced in fast DSCT. The diagnostic confidence for the evaluation of mediastinal (P < 0.001) and pulmonary (P = 0.008) pathologies was improved for fast DSCT.CONCLUSIONS:
Fast DSCT for chest/abdomen/pelvis staging CT examinations is performed within 2 seconds scan time and eliminates relevant intrathoracic motion/breathing artefacts. Mediastinal/pulmonary pathologies can thus be assessed with high diagnostic confidence. Abdominal image quality remains excellent. KEY POINTS ⢠Fast dual-source CT provides chest/abdomen/pelvis staging examinations within 2 seconds scan time. ⢠The sevenfold scan time reduction eliminates relevant intrathoracic motion/breathing artefacts. ⢠Mediastinal/pulmonary pathologies can now be assessed with high diagnostic confidence. ⢠The coverage of the peripheral soft tissues is comparable to single-source CT. ⢠Fast and large-volume oncologic DSCT can be performed with 9 mSv effective dose.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias Torácicas
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Radiografia Abdominal
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Radiografia Torácica
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Tomografia Computadorizada por Raios X
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Neoplasias Pulmonares
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Mediastino
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Neoplasias
Tipo de estudo:
Guideline
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Observational_studies
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Risk_factors_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:
2017
Tipo de documento:
Article