Fluoroscopy module

The Fluoroscopy module of Model-based RSA allows you to assess skeletal and endoprosthetic kinematics in fluoroscopic images using tantalum markers and/or 3D-models of implants.

Method

The Model-based RSA technique can also be applied in fluoroscopy studies. The main difference between RSA and fluoroscopy is the use of a single focus set-up.

Another difference is the presence of image (pincushion) distortion in conventional fluoroscopic systems. With a specially designed calibration box this distortion can be corrected. For digital flat panel systems this is not necessary.

The reported accuracy of Marker-based Fluoroscopic Analysis is in-plane 0.1 mm and out-of-plane 0.9 mm. The rotational accuracy is 0.1 degrees (Garling et al., 2005). Especially the out-of-plane accuracy must be taken into account when designing a fluoroscopy setup.

Developments

The developments of the fluoroscopy module are aiming at a fully automatic analysis of fluoroscopy image sequences.

Publications

• Garling EH, Kaptein BL, Geleijns K, Nelissen RGHH, Valstar ER.
  Marker Configuration Model Based Roentgen Fluoroscopic Analysis.
  Accuracy assessment by phantom tests and computer simulations.
  J Biomech 2005; Vol 38(4): 893-901.
• Garling EH, Kaptein BL, Nelissen RGHH, Valstar ER.
  Limited rotation of the mobile-bearing in a rotating platform total knee prosthesis.
  J Biomech 2007; in press.
• Garling EH, Kaptein BL, Mertens B, Barendregt, Veeger HEJ, Nelissen RGHH, Valstar ER.
  Soft-tissue artefact assessment during step-up using fluoroscopy and skin-mounted markers.
  J Biomech 2007; in press.