ArticleEuropean radiology2014
Comparison of image quality between 70 kVp and 80 kVp: application to paediatric cardiac CT.
Article in European radiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Image quality, radiation dose and diagnostic accuracy of 70 kVp whole brain volumetric CT perfusion imaging: a preliminary study.European radiology · 2016Trial
- Chest CTA in children younger than two years - a retrospective comparison of three contrast injection protocols.Scientific reports · 2019Article
- Radiation Dose and Image Quality in Pediatric Cardiac Computed Tomography: A Comparison Between Sequential and Third-Generation Dual-Source High-Pitch Spiral Techniques.Pediatric cardiology · 2016Article
- Pediatric thoracic CT angiography at 70 kV: a phantom study to investigate the effects on image quality and radiation dose.Pediatric radiology · 2016Article
- Image quality and dose optimisation for infant CT using a paediatric phantom.European radiology · 2016Article
- Radiation dose reduction based on CNR index with low-tube voltage scan for pediatric CT scan: experimental study using anthropomorphic phantoms.SpringerPlus · 2016Article
Corrections and comments
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Authors and funding
2 authors.
Funding
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Abstract
purposeTo evaluate noise level and contrast-to-noise ratio (CNR) with various kVp-mAs pairs producing the same computed tomography dose index (CTDI) value. The 80 kVp and new 70-kVp settings were compared. MATERIALS AND
methodsThe noise was measured in 10 ovoid water phantoms with different diameters from 10 cm to 28 cm. Contrast was obtained from CTs of iodine-filled tubes. Spiral acquisition protocols at 70 kVp and 80 kVp, with the same CTDI, were applied. In the clinical study, two matched groups, each of 21 paediatric patients, underwent 70-kVp or 80-kVp ECG-gated iodinated-enhanced sequential CT.
resultsNoise was significantly higher with 70 kVp than 80-kVp settings for all phantom sizes. Estimated CNR with phantoms was higher at 70 kVp than 80 kVp, and the difference decreased from 17% to 3% as phantom size increased. The mean CNR in paediatric patients was 15.2 at 70 kVp and 14.3 at 80 kVp (ns). The CNR difference was significantly larger in the small-child subgroup.
conclusionNoise level is slightly higher at the 70-kVp than the 80-kVp setting, but the CNR is higher, particularly for small children. Therefore, 70 kVp may be appropriate for contrast-enhanced CT examinations and 80 kVp for non-enhanced CT in small children. KEY POINTS: 70-kVp settings provide a slightly higher noise level compared to 80-kVp settings. The CNR is higher with 70-kVp than with 80-kVp settings. Without contrast, 80-kVp settings may be preferable over 70-kVp settings.
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