9 results found
Welgemoed C, Spezi E, Riddle P, et al., 2023, Clinical evaluation of atlas-based auto-segmentation in breast and nodal radiotherapy., Br J Radiol, Vol: 96
OBJECTIVES: Accurate contouring of anatomical structures allows for high-precision radiotherapy planning, targeting the dose at treatment volumes and avoiding organs at risk. Manual contouring is time-consuming with significant user variability, whereas auto-segmentation (AS) has proven efficiency benefits but requires editing before treatment planning. This study investigated whether atlas-based AS (ABAS) accuracy improves with template atlas group size and character-specific atlas and test case selection. METHODS AND MATERIALS: One clinician retrospectively contoured the breast, nodes, lung, heart, and brachial plexus on 100 CT scans, adhering to peer-reviewed guidelines. Atlases were clustered in group sizes, treatment positions, chest wall separations, and ASs created with Mirada software. The similarity of ASs compared to reference contours was described by the Jaccard similarity coefficient (JSC) and centroid distance variance (CDV). RESULTS: Across group sizes, for all structures combined, the mean JSC was 0.6 (SD 0.3, p = .999). Across atlas-specific groups, 0.6 (SD 0.3, p = 1.000). The correlation between JSC and structure volume was weak in both scenarios (adjusted R2-0.007 and 0.185).Mean CDV was similar across groups but varied up to 1.2 cm for specific structures. CONCLUSIONS: Character-specific atlas groups and test case selection did not improve accuracy outcomes. High-quality ASs were obtained from groups containing as few as ten atlases, subsequently simplifying the application of ABAS. CDV measures indicating auto-segmentation variations on the x, y, and z axes can be utilised to decide on the clinical relevance of variations and reduce AS editing. ADVANCES IN KNOWLEDGE: High-quality ABASs can be obtained from as few as ten template atlases.Atlas and test case selection do not improve AS accuracy.Unlike well-known quantitative similarity indices, volume displacement metrics provide information on the location of segmentation variations, helping ass
Welgemoed C, Coughlan S, McNaught P, et al., 2021, A dosimetric study to improve the quality of nodal radiotherapy in breast cancer, BJR|Open, ISSN: 2513-9878
Welgemoed C, Spezi E, Chowdhury A, et al., 2020, PO-0934: Evaluation of nodal outlining based on ESTRO guidelines in breast radiotherapy planning, Radiotherapy and Oncology, Vol: 152, Pages: S499-S499, ISSN: 0167-8140
Welgemoed C, Spezi E, Gooding M, et al., 2018, Does library sub-categorisation improve auto-outlining accuracy in breast radiotherapy planning?, 37th Meeting of the European-Society-for-Radiotherapy-and-Oncology (ESTRO), Publisher: ELSEVIER IRELAND LTD, Pages: S1065-S1065, ISSN: 0167-8140
Welgemoed C, Rogers J, McNaught P, et al., 2017, Deep inspirational breath hold to reduce cardiac dose in left-sided breast radiotherapy, JOURNAL OF RADIOTHERAPY IN PRACTICE, Vol: 16, Pages: 251-257, ISSN: 1460-3969
Tanna N, McLauchlan R, Karis S, et al., 2017, Assessment of Upfront Selection Criteria to Prioritise Patients for Breath-hold Left-sided Breast Radiotherapy, CLINICAL ONCOLOGY, Vol: 29, Pages: 356-361, ISSN: 0936-6555
Rogers J, Welgemoed C, Gujral D, 2016, Does body mass index or subcutaneous adipose tissue thickness affect interfraction prostate motion in patients receiving radical prostate radiotherapy?, JOURNAL OF RADIOTHERAPY IN PRACTICE, Vol: 15, Pages: 334-340, ISSN: 1460-3969
McLauchlan R, Perkins K, Welgemoed C, et al., 2016, Assessing set-up accuracy and reproducibility in breast cancer patients – one department’s experience over 8 years, UKRO/UKIO Annual Congress
Welgemoed C, 2008, Role development for therapy radiographers in breast planning: A case study and discussion of influencing factors, Journal of Radiotherapy in Practice, Vol: 7, Pages: 47-57, ISSN: 1460-3969
Purpose: The purpose of this case study is to discuss factors that have an influence on the process of role development in radiotherapy breast planning. Key themes: This article describes the process of development as experienced by the author and discusses factors that hindered the process of role development. These factors include development of a career plan, professional issues, resources, organisational structures, support from consultants, managers, multi-disciplinary, and professional colleagues and peer resistance. Conclusion: The author makes recommendations that may contribute to improving the role development strategy in the profession and aid successful implementation of advanced practitioner and consultant roles for those radiographers who aspire to the consultant radiographer role in future. The article concludes that there is a need to identify, standardise and coordinate role development for therapy radiographers nationally to increase the appointment of more consultant radiographers. © 2008 Cambridge University Press.
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