Users Manual

Install & Service Manual AT-SM-04
Prudent │ Flat-panel Digital X-ray Detector Rev.1.0.8
ⓒ 2020. PIXXGEN Corporation. All rights reserved. -55-
Appendix – Motion Radiography Procedure (Trigger 99)
1.DESCRIPTION
Traditional flexion/extension x-rays are obtained to rule out ligamentous injury. Motion radiography
shows the same views as traditional Flexion & Extension of the: Spine ( All segments) Knee, Shoulder,
Elbow or Hip or the similar Internal/External Rotation views. The difference is that in addition to
the two views normally acquired we will also obtain multiple images in between which can reveal
pathology not seen in the two traditional views.
The logic is that the patient with suspected joint instability complains of pain when they move. It
is reasonable to obtain the study while they move.
2.EQUIPMENT
The equipment required is:
• A traditional radiographic x-ray system
• A DR detector capable of opening and closing the acquisition window fast enough to
perform the described images. Typically, it should be 4 frames per second at full
resolution without pixel binning.
• Software capable of receiving, processing and displaying the acquired frames. The
display should be static and motions image review.
3.HISTORY
Previous attempts at this have been done with fluoroscopy which, because of noise and lack of
motion stopping, falls short of the required spatial & contrast resolution relegating it to the
Chiropractic realm.
Current technology is to use synchronization of the x-ray (Pulse) and the window opening of the
detector. This is a very valid approach but makes the study cost prohibitive for the very physicians
that need it because they need a sophisticated x-ray system not present in the current Orthopedic
practice. The Motion Radiography approach uses existing x-ray systems with an affordable DR
Detector.
4.PROCEDURE
The procedure is the same as traditional Flexion Extension, so no additional training for a qualified
medical professional is needed, but in order to do the motion radiographic procedure, the patient
must know their part. The traditional studies have two views. These views are the start and finish
of the Joint Motion Study. These should be demonstrated to the patient including the speed at
which that patient can achieve movement between them.