Virtually eliminate errors in positioning calibration markers on hip patients. KingMark™ allows you to routinely and accurately calculate the radiological magnification of the hip
using two separate radio-opaque markers. In clinical trials, KingMark performed four times more
accurately than the conventional, single-ball marker.
KingMark uses two separate markers—one behind the pelvis and the other in front, as the
patient lies supine. The anterior marker is a flexible strap that secures radio-opaque
balls at regular intervals. The posterior marker is a radiolucent pad with steel rods
embedded in a vertical row.
Two is better than one
Previously, accurate calibration relied on a single marker being exactly located in the
coronal plane of the hips—requiring special expertise and extra time. Surgeons couldn’t
easily identify misplaced markers on radiographs, sometimes leading to incorrect results.
- Quick and easy to apply correctly—patient lies centrally on the posterior pad. The anterior ball-strip is placed midline over the suprapubic area.
- Accurate callibration doesn’t depend on exact positioning by trained experts.
- It is visually apparent on the radiograph when markers are incorrectly positioned, so surgeons aren’t mislead.
Accurate in all sizes of patients
Single markers can be difficult to use in very large patients. Often markers are not imaged when
placed adjancent to the patient's hips because the pelvis is wider than the x-ray detector.
And positioning a marker between the patient’s thighs is socially unacceptable by both patient
Since KingMark is positioned midline, it always appears within the radiograph. The correct
positioning technique is the same for all sizes of patients and is not awkward or invasive.
Even on very large patients, calibration accuracy is not significantly diminished.
Automatic calibration in TraumaCad
TraumaCad will automatically detect the presence of KingMark in an x-ray, determine the magnification percentage, and size the image accurately.
For surgeons who need to perform manual calibration on radiographs with KingMark,
precise magnification values can be obtained by using the KingMark Calculator.