Scanning Protocol

Patient- specific solutions are designed with the aid of CT scans of the patient. Good quality scan data is, therefore, critical to the process of designing an accurate prosthesis.

  • Scan must contain 1mm thick axial slices
  • a Bone kernel of ┬▒ B65s should be used
  • Do not allow any patient movement during the scan
  • Refer to scan boundaries

Feel free to contact us if you have any queries about scanning or data transfer.

scanning

Scan Boundaries:

Scan boundaries should include all of the affected anatomical regions. Ensure that the upper and lower limit adhere to the specifications below:

  • Neurosurgery - scan boundary is from the top of the cranium to C1, ensuring that the field of view includes both sides of the cranium.
  • Maxillofacial surgery - scan boundary is from 2cm above the supraorbital rim to C2, ensuring that the field of view includes both sides of the cranium.
  • Orthopaedic surgery
    • Acetabular implant - scan boundary should be from above the ilium to below the ischium, ensuring that the field of view includes both sides of the pelvis.
    • Segmental truss -┬áscan boundary should include entire long bone (e.g., femur).
  • Plastic & reconstructive surgery -
    • Craniosynostosis - scan boundary is from the top of the cranium to C1, ensuring that the field of view includes both sides of the cranium

satisfactory-scan

Satisfactory CT image results

Quality images have clear, crisp boundaries and bone features. Boundaries between bone and surrounding soft tissue can be clearly observed in these images.

unsatisfactory-scan

Unsatisfactory CT image results

These images are blurry and have poor contrast between bone and surrounding tissue. Such images are difficult to segment and run the risk of being designed inaccurately.