Reduced dose helical CT scout imaging on next generation wide volume CT system decreases scan length and overall radiation exposure
Purpose: Traditional CT acquisition planning is based on scout projection images from planar anterior-posterior and lateral projections where the radiographer estimates organ locations. Alternatively, a new scout method utilizing ultra-low dose helical CT (3D Landmark Scan) offers cross-sectional im...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-12-01
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| Series: | European Journal of Radiology Open |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352047724000339 |
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| author | Alexa E. Golbus John L. Schuzer Chloe Steveson Shirley F. Rollison James Matthews Joseph Henry-Ellis Marco Razeto Marcus Y. Chen |
| author_facet | Alexa E. Golbus John L. Schuzer Chloe Steveson Shirley F. Rollison James Matthews Joseph Henry-Ellis Marco Razeto Marcus Y. Chen |
| author_sort | Alexa E. Golbus |
| collection | DOAJ |
| description | Purpose: Traditional CT acquisition planning is based on scout projection images from planar anterior-posterior and lateral projections where the radiographer estimates organ locations. Alternatively, a new scout method utilizing ultra-low dose helical CT (3D Landmark Scan) offers cross-sectional imaging to identify anatomic structures in conjunction with artificial intelligence based Anatomic Landmark Detection (ALD) for automatic CT acquisition planning. The purpose of this study is to quantify changes in scan length and radiation dose of CT examinations planned using 3D Landmark Scan and ALD and performed on next generation wide volume CT versus examinations planned using traditional scout methods. We additionally aim to quantify changes in radiation dose reduction of scans planned with 3D Landmark Scan and performed on next generation wide volume CT. Methods: Single-center retrospective analysis of consecutive patients with prior CT scan of the same organ who underwent clinical CT using 3D Landmark Scan and automatic scan planning. Acquisition length and dose-length-product (DLP) were collected. Data was analyzed by paired t-tests. Results: 104 total CT examinations (48.1 % chest, 15.4 % abdomen, 36.5 % chest/abdomen/pelvis) on 61 individual consecutive patients at a single center were retrospectively analyzed. 79.8 % of scans using 3D Landmark Scan had reduction in acquisition length compared to the respective prior acquisition. Median acquisition length using 3D Landmark Scan was 26.7 mm shorter than that using traditional scout methods (p < 0.001) with a 23.3 % median total radiation dose reduction (245.6 (IQR 150.0–400.8) mGy cm vs 320.3 (IQR 184.1–547.9) mGy cm). CT dose index similarly was overall decreased for scans planned with 3D Landmark and ALD and performed on next generation CT versus traditional methods (4.85 (IQR 3.8–7) mGy vs. 6.70 (IQR 4.43–9.18) mGy, respectively, p < 0.001). Conclusion: Scout imaging using reduced dose 3D Landmark Scan images and Anatomic Landmark Detection reduces acquisition range in chest, abdomen, and chest/abdomen/pelvis CT scans. This technology, in combination with next generation wide volume CT reduces total radiation dose. |
| format | Article |
| id | doaj-art-4c81bcc7afe8434eaabe2edac348d687 |
| institution | OA Journals |
| issn | 2352-0477 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | European Journal of Radiology Open |
| spelling | doaj-art-4c81bcc7afe8434eaabe2edac348d6872025-08-20T02:37:52ZengElsevierEuropean Journal of Radiology Open2352-04772024-12-011310057810.1016/j.ejro.2024.100578Reduced dose helical CT scout imaging on next generation wide volume CT system decreases scan length and overall radiation exposureAlexa E. Golbus0John L. Schuzer1Chloe Steveson2Shirley F. Rollison3James Matthews4Joseph Henry-Ellis5Marco Razeto6Marcus Y. Chen7Cardiovascular Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USACanon Medical Research USA, Vernon Hills, IL, USACanon Medical Systems, Otawara, Tochigi, JapanRadiology and Imaging Sciences, Clinical Center, National Institutes of Health, Bethesda, MD, USACanon Medical Research Europe, Edinburgh, Scotland, UKCanon Medical Research Europe, Edinburgh, Scotland, UKCanon Medical Research Europe, Edinburgh, Scotland, UKCardiovascular Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA; Correspondence to: Advanced Cardiovascular Imaging Laboratory, Cardiovascular Branch, National Heart, Lung and Blood Institute, National Institutes of Health, 10 Center Drive, Building 10, Room B1D47, Bethesda, MD 20892-1046, USA.Purpose: Traditional CT acquisition planning is based on scout projection images from planar anterior-posterior and lateral projections where the radiographer estimates organ locations. Alternatively, a new scout method utilizing ultra-low dose helical CT (3D Landmark Scan) offers cross-sectional imaging to identify anatomic structures in conjunction with artificial intelligence based Anatomic Landmark Detection (ALD) for automatic CT acquisition planning. The purpose of this study is to quantify changes in scan length and radiation dose of CT examinations planned using 3D Landmark Scan and ALD and performed on next generation wide volume CT versus examinations planned using traditional scout methods. We additionally aim to quantify changes in radiation dose reduction of scans planned with 3D Landmark Scan and performed on next generation wide volume CT. Methods: Single-center retrospective analysis of consecutive patients with prior CT scan of the same organ who underwent clinical CT using 3D Landmark Scan and automatic scan planning. Acquisition length and dose-length-product (DLP) were collected. Data was analyzed by paired t-tests. Results: 104 total CT examinations (48.1 % chest, 15.4 % abdomen, 36.5 % chest/abdomen/pelvis) on 61 individual consecutive patients at a single center were retrospectively analyzed. 79.8 % of scans using 3D Landmark Scan had reduction in acquisition length compared to the respective prior acquisition. Median acquisition length using 3D Landmark Scan was 26.7 mm shorter than that using traditional scout methods (p < 0.001) with a 23.3 % median total radiation dose reduction (245.6 (IQR 150.0–400.8) mGy cm vs 320.3 (IQR 184.1–547.9) mGy cm). CT dose index similarly was overall decreased for scans planned with 3D Landmark and ALD and performed on next generation CT versus traditional methods (4.85 (IQR 3.8–7) mGy vs. 6.70 (IQR 4.43–9.18) mGy, respectively, p < 0.001). Conclusion: Scout imaging using reduced dose 3D Landmark Scan images and Anatomic Landmark Detection reduces acquisition range in chest, abdomen, and chest/abdomen/pelvis CT scans. This technology, in combination with next generation wide volume CT reduces total radiation dose.http://www.sciencedirect.com/science/article/pii/S2352047724000339Artificial intelligenceAnatomic landmarksRadiation dosageTomography, spiral computedTomography, x-ray computed |
| spellingShingle | Alexa E. Golbus John L. Schuzer Chloe Steveson Shirley F. Rollison James Matthews Joseph Henry-Ellis Marco Razeto Marcus Y. Chen Reduced dose helical CT scout imaging on next generation wide volume CT system decreases scan length and overall radiation exposure European Journal of Radiology Open Artificial intelligence Anatomic landmarks Radiation dosage Tomography, spiral computed Tomography, x-ray computed |
| title | Reduced dose helical CT scout imaging on next generation wide volume CT system decreases scan length and overall radiation exposure |
| title_full | Reduced dose helical CT scout imaging on next generation wide volume CT system decreases scan length and overall radiation exposure |
| title_fullStr | Reduced dose helical CT scout imaging on next generation wide volume CT system decreases scan length and overall radiation exposure |
| title_full_unstemmed | Reduced dose helical CT scout imaging on next generation wide volume CT system decreases scan length and overall radiation exposure |
| title_short | Reduced dose helical CT scout imaging on next generation wide volume CT system decreases scan length and overall radiation exposure |
| title_sort | reduced dose helical ct scout imaging on next generation wide volume ct system decreases scan length and overall radiation exposure |
| topic | Artificial intelligence Anatomic landmarks Radiation dosage Tomography, spiral computed Tomography, x-ray computed |
| url | http://www.sciencedirect.com/science/article/pii/S2352047724000339 |
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