https://scholars.lib.ntu.edu.tw/handle/123456789/485666
標題: | Multi-subject atlas-based auto-segmentation reduces interobserver variation and improves dosimetric parameter consistency for organs at risk in nasopharyngeal carcinoma: A multi-institution clinical study | 作者: | Tao C.-J. Yi J.-L. Chen N.-Y. Ren W. CHIA-HSIEN CHENG Tung S. Kong L. Lin S.-J. Pan J.-J. Zhang G.-S. Hu J. Qi Z.-Y. Ma J. Lu J.-D. Yan D. Sun Y. |
關鍵字: | Atlas-based auto segmentation (ABAS); Contour variation; Dosimetric parameter; Nasopharyngeal carcinoma; Organs at risk | 公開日期: | 2015 | 出版社: | Elsevier Ireland Ltd | 卷: | 115 | 期: | 3 | 起(迄)頁: | 407-411 | 來源出版物: | Radiotherapy and Oncology | 摘要: | Background and purpose To assess whether consensus guideline-based atlas-based auto-segmentation (ABAS) reduces interobserver variation and improves dosimetric parameter consistency for organs at risk (OARs) in nasopharyngeal carcinoma (NPC). Materials and methods Eight radiation oncologists from 8 institutes contoured 20 OARs on planning CT images of 16 patients via manual contouring and manually-edited ABAS contouring. Interobserver variation [volume coefficient of variation (CV), Dice similarity coefficient (DSC), three-dimensional isocenter difference (3D-ICD)] and dosimetric parameters were compared between the two methods of contouring for each OAR. Results Interobserver variation was significant for all OARs in manual contouring, resulting in significant dosimetric parameter variation (P < 0.05). Edited ABAS significantly improved multiple metrics and reduced dosimetric parameter variation for most OARs; brainstem, spinal cord, cochleae, temporomandibular joint (TMJ), larynx and pharyngeal constrictor muscle (PCM) obtained most benefit (range of mean DSC, volume CV and main ICD values was 0.36-0.83, 12.1-84.3%, 2.2-5.0 mm for manual contouring and 0.42-0.86, 7.2-70.6%, 1.2-3.5 mm for edited ABAS contouring, respectively; range of dose CV reduction: 1.0-3.0%). Conclusion Substantial objective interobserver differences occur during manual contouring, resulting in significant dosimetric parameter variation. Edited ABAS reduced interobserver variation and improved dosimetric parameter consistency, particularly for brainstem, spinal cord, cochleae, TMJ, larynx and PCM. ? 2015 Elsevier Ireland Ltd. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946398054&doi=10.1016%2fj.radonc.2015.05.012&partnerID=40&md5=43c8decb0e6deb672a726d7d02b59d02 https://scholars.lib.ntu.edu.tw/handle/123456789/485666 |
ISSN: | 0167-8140 | DOI: | 10.1016/j.radonc.2015.05.012 | SDG/關鍵字: | antineoplastic metal complex; Article; atlas based autosegmentation; brain stem; clinical article; cochlea; cone beam computed tomography; consensus; dosimetry; human; intensity modulated radiation therapy; larynx; mandible; multicenter study; nasopharynx carcinoma; nerve; optic chiasm; optic nerve; organs at risk; parotid gland; pharyngeal constrictor muscle; pharyngeal muscle; practice guideline; priority journal; radiation dose reduction; radiological procedures; radiotherapy planning system; spinal cord; temporal lobe; temporomandibular joint; three dimensional imaging; cancer staging; clinical trial; computer assisted radiotherapy; first cervical vertebra; Nasopharyngeal Neoplasms; observer variation; organs at risk; pathology; procedures; radiography; radiometry; Brain Stem; Cervical Atlas; Humans; Nasopharyngeal Neoplasms; Neoplasm Staging; Observer Variation; Organs at Risk; Radiometry; Radiotherapy Planning, Computer-Assisted; Spinal Cord |
顯示於: | 腫瘤醫學研究所 |
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