The newest innovation (invention) to be introduced by A2D2 is the use of Motion in an otherwise static image scene. What this means is that any conventional diagnostic X-ray machine can easily record any scene in Motion. This extends the use of an otherwise conventional machine into a new and powerful tool that has existed for decades in the radiology department. A2D2 has simply extended the useful life of this device into a digital device that opens new avenues for diagnostic testing by adding Motion to an otherwise static scene.
In general, it is best to use high frequency X-ray equipment for recording any Motion study. This best assures good data collection even with over sized patients. Older single phase machines can be used but results might be disappointing with patients of large girth.
This Motion feature allows any scene to be studied in detail when seeking any form of aberrant Motion regardless of body part. Results are virtually instantaneous.
Conventional radiography is now used for the recording of motion studies. This method does not employ the use of fluoroscopy that has been is most common use of X-rays but rather uses conventional X-rays. The manner of recording a motion study is to couple an X-ray system with a digital computer and a detection system that records images in real time. The A2D2, Inc. Model 1713 is a digital system that is capable of recoding static images or a dynamic sequence.
Static images are recorded in a 5,000 by 4,000 pixel array with 14 bit capacity. These images are stored in the computer memory for recording and/or playback. Dynamic studies are recorded in real time at a rate of 30 frames per second with resolution of 1990 by 1200 pixels. Typically, one second of data recording is required for a complete motion study at 30 frames per second. Sophisticated software is used to automatically record the study and then to cause it to playback in a bi-directional format.
Patient radiation dose is minimal over the one second time frame. Typical radiation dose is approximately 0.27mSv for this one second period. Any form of joint motion can be recorded and analyzed.