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Value of monoenergetic low-kV dual energy CT datasets for improved image quality of CT pulmonary angiography
- Source :
- European Journal of Radiology. 83:322-328
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- High vessel attenuation and high contrast-to-noise ratio (CNR) are prerequisites for high diagnostic confidence in CT pulmonary angiography (CTPA). This study evaluated the impact of calculated monoenergetic dual-energy (DE) CTPA datasets on vessel attenuation and CNR.50 Patients (24 men, mean age 68 ± 14 years) who underwent DE-CTPA were retrospectively included in this study. The 80 and 140-kV DE polyenergetic image data were used to calculate virtual monoenergetic image datasets in 10 kiloelectron volt (keV) increments from 40 to 120 keV. Vessel and soft tissue attenuation and image noise were measured in various regions of interest and the CNR was subsequently calculated. Differences in vessel attenuation and CNR were compared between the different monoenergetic datasets. The best monoenergetic dataset was then compared to the standard 120-kV polyenergetic dataset.Vessel attenuation and CNR of 70-keV CTPA datasets were superior to all other monoenergetic image datasets (all p0.05). 70-keV monoenergetic datasets provided a statistically significant 12% increase in mean vessel attenuation compared to standard 120-kV polyenergetic datasets (384 ± 117 HU vs. 342 ± 106 HU, respectively; p0.0001) and a statistically significant 18% increase in mean CNR (29 ± 13 vs. 24 ± 11 respectively; p0.0001).Virtual 70-keV monoenergetic CTPA image datasets significantly increase vessel attenuation and CNR of DE-CTPA studies, suggesting that clinical application of low-keV monoenergetic reconstructions may allow a decrease in the amount of iodinated contrast required for adequate image quality in DE-CTPA examinations.
- Subjects :
- Male
medicine.medical_specialty
Image quality
Dual source ct
Pulmonary Artery
Radiation Dosage
Sensitivity and Specificity
Iodinated contrast
Image noise
Humans
Medicine
Radiology, Nuclear Medicine and imaging
Aged
Ct pulmonary angiography
business.industry
Attenuation
Angiography
Reproducibility of Results
Dose-Response Relationship, Radiation
Mean age
General Medicine
Radiographic Image Enhancement
cardiovascular system
Feasibility Studies
Female
Radiology
Dual energy ct
Pulmonary Embolism
Tomography, X-Ray Computed
business
Nuclear medicine
Subjects
Details
- ISSN :
- 0720048X
- Volume :
- 83
- Database :
- OpenAIRE
- Journal :
- European Journal of Radiology
- Accession number :
- edsair.doi.dedup.....5ee803686c4e95c51745a461c79dbbdc