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Spine segmentation in the surgical scoliosis treatment

Spine segmentation in the surgical scoliosis treatment. Zdzislaw Krol UKBB Basel. Outlook. Spine segmentiation in CT data Manual segmentation Pre-processing and segmentation techniques for acceleration of the manual or semi- manual segmentation

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Spine segmentation in the surgical scoliosis treatment

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  1. Spine segmentationin thesurgicalscoliosistreatment Zdzislaw Krol UKBB Basel

  2. Outlook • Spine segmentiation in CT data • Manual segmentation • Pre-processingandsegmentationtechniquesforaccelerationofthemanualor semi-manualsegmentation • Segmentation: normal spinevsscoliotic spine • Surgical scoliosis treatment: • computer-aided surgery planning

  3. CT: spine segmentation ANALOGY T. Klinder et al. / Automated model-based vertebra detection, identification, and segmentation in CT images Medical Image Analysis 13 (2009) 471–482 Fig. 2. Block diagram of framework. Based on the spine curve extraction, a CPR is applied and the vertebrae are detected in the reformatted image. Found candidates are transformed back to the original image – visualized as yellow spheres located between each vertebra. Afterwards, candidates are identified - visualized as prepositioned models; colour coding illustrates labels of vertebra meshes. Finally, meshes are adapted to the respective image structures.

  4. Spineanatomy Spine anatomy. Lateral view of spine (a) and ventral (b).

  5. Surface based spine model Spineanatomy Vertebraeclassification “Some individuals have four lumbar vertebrae, while others have six”

  6. Spinal cord/canal identification

  7. WN: CT data

  8. Goal: identificationofeachsinglevertebra

  9. Pre-processingandsegmentationtechniquesforaccelerationofthemanualor semi-manualsegmentation • Noise reduction • Mask hole filling • Background elimination

  10. Accelerationofthemanualsegmentation WacomIntuos 5 Tabletwithpen

  11. Real cases

  12. Surgical treatment of scoliosis

  13. Vertebra anatomy Thoracic vertebra viewed from above [from Gray's Anatomy]

  14. Surgicaltreatmentt: Pedicle screws [Synthes]

  15. Scoliosis: CT data segmentation

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