Patient positioning during pediatric cardiothoracic computed tomography using a high-resilience pad system and pre-scan measurement of chest thickness
Abstract Patient positioning at the isocenter of the CT gantry is important for optimizing image quality and radiation dose, but accurate positioning is challenging in pediatric patients. We evaluated whether the high-resilience pad and pre-scan measurement of chest thickness allow accurate position...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-10-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-21018-5 |
| _version_ | 1797996110919237632 |
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| author | Satoshi Higuchi Tatsuya Nishii Atsushi Hirota Shota Harumoto Hiroki Horinouchi Emi Tateishi Yasutoshi Ohta Keisuke Kiso Kenichi Kurosaki Tetsuya Fukuda |
| author_facet | Satoshi Higuchi Tatsuya Nishii Atsushi Hirota Shota Harumoto Hiroki Horinouchi Emi Tateishi Yasutoshi Ohta Keisuke Kiso Kenichi Kurosaki Tetsuya Fukuda |
| author_sort | Satoshi Higuchi |
| collection | DOAJ |
| description | Abstract Patient positioning at the isocenter of the CT gantry is important for optimizing image quality and radiation dose, but accurate positioning is challenging in pediatric patients. We evaluated whether the high-resilience pad and pre-scan measurement of chest thickness allow accurate positioning in pediatric patients with congenital heart disease. Sixty-seven patients aged 7 years or younger who underwent cardiothoracic CT were enrolled. The ideal table height, defined as the position at which the scanner’s and patient’s isocenters coincided, was determined by radiographers either manually (manual group) or based on the pad’s and chest’s thickness (calculated group). The distance between the two isocenters and image quality were evaluated. The calculated group demonstrated smaller isocenter distance and standard deviation (distance: 0.2 ± 5.8 mm vs. − 8.3 ± 11.6 mm, p < 0.01; absolute value: 4.1 [1.9–8.0] mm vs. 12.3 [5.1–16.3] mm, p < 0.01), and higher signal-to-noise ratio (SNR) and dose-normalized SNR (SNRD) in the descending aorta than the manual group (SNR: 39.8 [31.0–53.7] vs. 31.9 [28.9–36.6], p = 0.048, SNRD: 39.8 [31.0–53.7] vs. 31.9 [28.9–36.6], p = 0.04). The system allowed for more accurate positioning in pediatric cardiothoracic CT, yielding higher image quality. |
| first_indexed | 2024-04-11T10:12:18Z |
| format | Article |
| id | doaj.art-e9d720fa2d23400abf97c9879e280694 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-11T10:12:18Z |
| publishDate | 2022-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-e9d720fa2d23400abf97c9879e2806942022-12-22T04:30:04ZengNature PortfolioScientific Reports2045-23222022-10-011211810.1038/s41598-022-21018-5Patient positioning during pediatric cardiothoracic computed tomography using a high-resilience pad system and pre-scan measurement of chest thicknessSatoshi Higuchi0Tatsuya Nishii1Atsushi Hirota2Shota Harumoto3Hiroki Horinouchi4Emi Tateishi5Yasutoshi Ohta6Keisuke Kiso7Kenichi Kurosaki8Tetsuya Fukuda9Department of Radiology, National Cerebral and Cardiovascular CenterDepartment of Radiology, National Cerebral and Cardiovascular CenterDepartment of Pediatric Cardiology, National Cerebral and Cardiovascular CenterDepartment of Radiology, National Cerebral and Cardiovascular CenterDepartment of Radiology, National Cerebral and Cardiovascular CenterDepartment of Radiology, National Cerebral and Cardiovascular CenterDepartment of Radiology, National Cerebral and Cardiovascular CenterDepartment of Radiology, National Cerebral and Cardiovascular CenterDepartment of Pediatric Cardiology, National Cerebral and Cardiovascular CenterDepartment of Radiology, National Cerebral and Cardiovascular CenterAbstract Patient positioning at the isocenter of the CT gantry is important for optimizing image quality and radiation dose, but accurate positioning is challenging in pediatric patients. We evaluated whether the high-resilience pad and pre-scan measurement of chest thickness allow accurate positioning in pediatric patients with congenital heart disease. Sixty-seven patients aged 7 years or younger who underwent cardiothoracic CT were enrolled. The ideal table height, defined as the position at which the scanner’s and patient’s isocenters coincided, was determined by radiographers either manually (manual group) or based on the pad’s and chest’s thickness (calculated group). The distance between the two isocenters and image quality were evaluated. The calculated group demonstrated smaller isocenter distance and standard deviation (distance: 0.2 ± 5.8 mm vs. − 8.3 ± 11.6 mm, p < 0.01; absolute value: 4.1 [1.9–8.0] mm vs. 12.3 [5.1–16.3] mm, p < 0.01), and higher signal-to-noise ratio (SNR) and dose-normalized SNR (SNRD) in the descending aorta than the manual group (SNR: 39.8 [31.0–53.7] vs. 31.9 [28.9–36.6], p = 0.048, SNRD: 39.8 [31.0–53.7] vs. 31.9 [28.9–36.6], p = 0.04). The system allowed for more accurate positioning in pediatric cardiothoracic CT, yielding higher image quality.https://doi.org/10.1038/s41598-022-21018-5 |
| spellingShingle | Satoshi Higuchi Tatsuya Nishii Atsushi Hirota Shota Harumoto Hiroki Horinouchi Emi Tateishi Yasutoshi Ohta Keisuke Kiso Kenichi Kurosaki Tetsuya Fukuda Patient positioning during pediatric cardiothoracic computed tomography using a high-resilience pad system and pre-scan measurement of chest thickness Scientific Reports |
| title | Patient positioning during pediatric cardiothoracic computed tomography using a high-resilience pad system and pre-scan measurement of chest thickness |
| title_full | Patient positioning during pediatric cardiothoracic computed tomography using a high-resilience pad system and pre-scan measurement of chest thickness |
| title_fullStr | Patient positioning during pediatric cardiothoracic computed tomography using a high-resilience pad system and pre-scan measurement of chest thickness |
| title_full_unstemmed | Patient positioning during pediatric cardiothoracic computed tomography using a high-resilience pad system and pre-scan measurement of chest thickness |
| title_short | Patient positioning during pediatric cardiothoracic computed tomography using a high-resilience pad system and pre-scan measurement of chest thickness |
| title_sort | patient positioning during pediatric cardiothoracic computed tomography using a high resilience pad system and pre scan measurement of chest thickness |
| url | https://doi.org/10.1038/s41598-022-21018-5 |
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