Automated tube voltage selection in pediatric non-contrast chest CT

Modern CT scanners provide automatic dose adjustment systems, which are promising options for reducing radiation dose in pediatric CT scans. Their impact on patient dose, however, has not been investigated sufficiently thus far. To evaluate automated tube voltage selection (ATVS) in combination with...

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Bibliographic Details
Published in:PloS one 2018-10, Vol.13 (10), p.e0204794-e0204794
Main Authors: Hojreh, Azadeh, Homolka, Peter, Gamper, Jutta, Unterhumer, Sylvia, Kienzl-Palma, Daniela, Balassy, Csilla, Wrba, Thomas, Prosch, Helmut
Format: Article
Language:English
Subjects:
Algorithms
Analysis
Aorta
Automation
Biology and Life Sciences
Bronchus
Care and treatment
CAT scans
Chest
Child
Children
Computed tomography
Contrast Media - metabolism
Correlation
Current modulation
Cystic fibrosis
Cysts
Diagnostic systems
Drug dosages
Electric potential
Female
Health aspects
Humans
Image contrast
Image quality
Male
Medical diagnosis
Medical imaging
Medicine and Health Sciences
Patients
Pediatrics
People and Places
Physical Sciences
Quality
Quality assessment
Radiation
Radiation Dosage
Radiation effects
Radiographic Image Interpretation, Computer-Assisted - methods
Readers
Research and Analysis Methods
Retrospective Studies
Scanners
Signal-To-Noise Ratio
Thorax - diagnostic imaging
Tomography, X-Ray Computed - methods
Transformation
Voltage
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Summary:Modern CT scanners provide automatic dose adjustment systems, which are promising options for reducing radiation dose in pediatric CT scans. Their impact on patient dose, however, has not been investigated sufficiently thus far. To evaluate automated tube voltage selection (ATVS) in combination with automated tube current modulation (ATCM) in non-contrast pediatric chest CT, with regard to the diagnostic image quality. There were 160 non-contrast pediatric chest CT scans (8.7±5.4 years) analyzed retrospectively without and with ATVS. Correlations of volume CT Dose Index (CTDIvol) and effective diameter, with and without ATVS, were compared using Fisher's z-transformation. Image quality was assessed by mean signal-difference-to-noise ratios (SDNR) in the aorta and in the left main bronchus using the independent samples t-test. Two pediatric radiologists and a general radiologist rated overall subjective Image quality. Readers' agreement was assessed using weighted kappa coefficients. A p value
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0204794