ArticleEuropean radiology2021
Excessive z-axis scan coverage in body CT: frequency and causes.
Article in European radiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 14 citations in OpenAlex.
- TOPOS: target organ prediction on scout views for automated CT scan planning.European radiology · 2026Article
- Scan Range and Radiation Dose of the Ultra-High-Resolution Series in Pancreatic Photon-Counting Detector CT: A Prospective Two-Group Comparison of an Ultra-Low-Dose Planning Series.Diagnostics (Basel, Switzerland) · 2026Article
- Mapping the Landscape of Over-Scanning in CT Imaging: A Scoping Review.Journal of medical radiation sciences · 2026Review
- Additional vertebrae are imaged in 44% of pediatric patients when limited CTs are ordered: a pilot study.Spine deformity · 2026Article
- Investigating the Influence of Limited CT Scan Coverage Using an Automated Workflow with Biofidelic Sideways Fall FE Models.Annals of biomedical engineering · 2026Article
- Low-Dose CT Quality Assurance at Scale: Automated Detection of Overscanning, Underscanning, and Image Noise.Life (Basel, Switzerland) · 2026Article
- AI-driven assessment of over-scanning in chest CT: A systematic review and meta-analysis.European journal of radiology open · 2025Review
- Computed Tomography Doses Calculation: Do We Really Need a New Dose Assessment Tool?Journal of clinical medicine · 2025Article
- Fully automated accurate patient positioning in computed tomography using anterior-posterior localizer images and a deep neural network: a dual-center study.European radiology · 2023Article
- CT analysis of thoracolumbar body composition for estimating whole-body composition.Insights into imaging · 2023Article
- Deep learning-based fully automated Z-axis coverage range definition from scout scans to eliminate overscanning in chest CT imaging.Insights into imaging · 2021Article
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectivesThe aim of this study was to determine the frequency and causing factors of excessive z-axis coverage in body CT examinations.
methodsA total of 2032 body CT examinations performed between 1 March and 1 April 2018 in 1531 patients were included in this study. The over-scanned length values in the z-axis for each CT examination on each patient were determined by calculating the difference between the actual scanned length and optimal scan length in the z-axis. Over-scanning and over-scanning ratios were interrogated in terms of potential underlying factors that can be affected by patient demography, time, the throughput of CT, and the experience of technologists.
resultsOver-scanned CTs in z-axis were 66% of all CTs performed. CT scans were over-scanned in the cranial side in 18.4% and caudal side in 48.5% of patients. Over-scanning was found to be more frequent in 55-64-year-old age group (74%), thorax CTs (89.2%), patients with consciousness change (88.9%), patients with misleading findings related to lung apex or diaphragm on the scout images (76.6%), CTs performed in day shift (66.8 %), in CT with low daily scan (72.4%), and CT scans performed by less-experienced technologists (75.9%).
conclusionsOver-scanning in z-axis in body CT examinations is not infrequently encountered in routine practice. Awareness of causes of over-scanning in z-axis can be helpful to prevent over-scanning in CT and unnecessary ionizing radiation exposure in patients. KEY POINTS: • Over-scanning in z-axis frequently occurs in body CT. • The frequency of over-scanning in caudal side is higher than cranial side. • Chest CT and any CT performed in following situation were more prone to over-scanning: older patients, patients with consciousness change, presence of misleading findings on the scout images related to lung apex or diaphragm, day shift, CT with low daily scan, less-experienced technologist.
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