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Evaluation of a seg...
Evaluation of a segmentation procedure to delineate organs for use in construction of a radiation therapy planning atlas
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- Qatarneh, Sharif M. (författare)
- Stockholms universitet,Medicinsk strålningsfysik (tills m KI)
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- Noz, Marilyn E. (författare)
- New York University, Department of Radiology,Nuclear Medicine
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- Hyodynmaa, Simo (författare)
- Tampere Univ Hosp, Dept Oncol, Tampere, Finland
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- Maguire Jr., Gerald Q. (författare)
- KTH,Mikroelektronik och informationsteknik, IMIT
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- Kramer, Elissa L. (författare)
- New York University, Department of Radiology
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- Crafoord, Joakim (författare)
- Department of Radiology, Karolinska Hospital
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(creator_code:org_t)
- 2003
- 2003
- Engelska.
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Ingår i: International Journal of Medical Informatics. - 1386-5056 .- 1872-8243. ; 69, s. 39-55
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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http://kipublication...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Objectives: This paper evaluates a semi-automatic segmentation procedure to enhance utilizing atlas based treatment plans. For this application, it is crucial to provide a collection of 'reference' organs, restorable from the atlas so that they closely match those of the current patient. To enable assembling representative organs, we developed a semiautomatic procedure using an active contour method. Method: The 3D organ volume was identified by defining contours on individual slices. The initial organ contours were matched to patient volume data sets and then superimposed on them. These starting contours were then adjusted and refined to rapidly find the organ outline of the given patient. Performance was evaluated by contouring organs of different size, shape complexity, and proximity to surrounding structures. We used representative organs defined on CT volumes obtained from 12 patients and compared the resulting outlines to those drawn by a radiologist. Results: A strong correlation was found between the area measures of the delineated liver (r = 0.992), lung (r = 0.996) and spinal cord (r = 0.81), obtained by both segmentation techniques. A paired Student's t-test showed no statistical difference between the two techniques regarding the liver and spinal cord (p > 0.05). Conclusion: This method could be used to form 'standard' organs, which would form part of a whole body atlas (WBA) database for radiation treatment plans as well as to match atlas organs to new patient data.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Cancer och onkologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cancer and Oncology (hsv//eng)
Nyckelord
- active contour model
- matching transformation
- radiation therapy planning
- segmentation
- whole body atlas
- image registration
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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