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Adjustable Orthopedic Calibration Device

KingMark accurately calibrates AP pelvic images and measures patient anatomy.

Kingmark was designed to help accurately calibrate AP pelvic images and measure the anatomy of the patient
Kingmark uses two separate markers that are streamlined and non-invasive

Precise AP Pelvic Image Calibration

KingMark® is an adjustable, double calibration device for AP pelvic X-Ray images. In clinical trials, KingMark was shown to be superior to the conventional, single-ball marker1.
KingMark uses two separate markers—one behind the pelvis and one in front. The posterior marker is a radiolucent pad with steel rods embedded in a vertical row. The anterior marker is a flexible strap with radio-opaque balls secured at regular intervals.

  • Positioning is the same for all sizes of patients and is not cumbersome or invasive
  • KingMark is visible on the radiograph when markers are incorrectly positioned, thus preventing positioning errors
  • TraumaCad® automatically detects KingMark, determines the magnification percentage and re-sizes it to allow accurate measurements and template selection


King et al., A novel method of accurately calculating the radiological magnification of the hip, 
   J Bone Joint Surg Br. 2009 Sep;91(9):1217-22