The University is soliciting prospective proponents to submit proposals for a Biplanar Videoradiography System.
Biplanar videoradiography, also known as X-ray Reconstruction of Moving Morphology (XROMM), is a high-speed 3D imaging technology for measuring in-vivo bone movement. It uses two x-ray sources coupled to image intensifiers to obtain images of the bones during dynamic movements. These images are recorded using two high-speed video cameras . Using these two images it is then possible to determine the six-degree-of-freedom pose of each bone through a process called rotoscoping. This requires a 3D CT of the bone that can be manipulated such that digitally reconstructed radiographs match the captured videoradiography images. This enables highly accurate measurement of bone kinematics during dynamic movements.
The biplanar videoradiography system must be capable of capturing high-resolution images of the skeleton at a frame rate of at least 120Hz from two x-ray generator and image intensifier pairs. The positioning of the components must be adjustable such that optimal views can be obtained depending on the joint and task of interest. The mounting for the imaging components should be such that the system can be used for a participant on the instrumented treadmill (FIT5, Bertec, USA; Figure 1) or overground in the adjacent space. The laboratory will also be equipped with optical marker-based and markerless motion capture cameras (Qualisys, Sweden), and the biplanar videogradiography system must be capable of being used simulaneously with this motion capture system. The capture images will be used along with computed tomography (CT) images to track the 3D pose of individual bones using the SlicerAutoscoper software. A portable leaded partition is required to shield the control station when the system is in use (Figure 2).
Mandatory Requirements:
1. Biplanar Videoradiography System
1.1 The system must have two pairs of x-ray generators and image intensifiers.
1.2 The x-ray generators and image intensifiers must be mounted on mobile stands such that the system can be used around the treadmill or overground in the space next to the treadmill.
1.3 The system must be capable of capturing at least 120Hz.
1.4 The system must permit adjustment of the interbeam angle and height such that it can be used with different joints.
1.5 The system must be capable of operating in pulsed and continuous modes.
1.5 The system must be capable of being used simultaneously with the Qualisys motion capture system and instrumented treadmill/force plates.
1.6 The system must output data in a format that is compatible with SlicerAutoscoper (https://autoscoper.readthedocs.io/) such that when combined with a CT scan, the six-degree-of-freedom bone pose(s) can be obtained using this software.
2. Shielding
2.1 A 0.79 mm-thick portable leaded partition must be provided to shield the control station when the system is in use.
3. Other Requirements
3.1 Must include a minimum of one (1) year of warranty on parts and labour.
3.2 CSA certification or equivalent is required, as per the Electrical Safety Authority Recognized Certification Mark: https://esasafe.com/electrical-products/recognized-certification-marks/ If any electrical components do not arrive with an acceptable certification marking, uOttawa must be allowed to open/modify the instrument as required in order to have it CSA Certified. Said inspection/modification, if required, must not void any warranty.
3.3 Delivery, installation, initial calibration, testing, and training must be included.
