For radiography, flat X-ray detectors (FDs) with evaporated scintillation layers are at the level of product introduction.
The upper left end point on the projection plane of a flat panel X-ray detector was defined as the world coordinate system origin [ 13, 14]).
The relative geometric relationship between the X-ray source and the projection plane of the flat panel X-ray detector system was determined using a coordinate building frame [ 13, 14].
The 3D digital image was constructed in a virtual 3D space by the CT data, and computer simulation of the radiographic process was carried out to generate virtual digitally reconstructed radiograph (DRR), in which the light source and projection plane parameters were set identical to the actual flat panel X-ray detector imaging conditions [ 13]).
Continuous X-ray images of gait, chair-rising, squatting, and twisting were taken using a flat panel X-ray detector.
The density-based DRRs were then compared with the serial X-ray images acquired using the flat panel X-ray detector).
Finally, sequential movements in squatting were collected twice because the flat panel X-ray detector still provided a limited field of view.
This study first evaluated in vivo hip joint kinematics during daily life activities using density-based DRRs and flat panel X-ray detector.
In practical terms, the simulation images were constructed by repositioning the 3D digital image in 6 degrees of freedom, and the matching fitness was by counting the voxels that did not correspond between the constructed images and a flat panel X-ray detector derived X-ray scans (i.e., exclusive disjunctions).
Continuous anteroposterior radiographic images of gait, chair-rising, squatting, and twisting motions were recorded using a flat panel X-ray detector (Ultimax-I, Toshiba, Tochigi, Japan) with an image area of 420 mm (H) × 420 mm (V) and 0.274 mm × 0.274 mm/pixel resolution.
Digital chest radiography with a solid-state flat-panel x-ray detector: contrast-detail evaluation with processed images printed on film hard copy.
