Mobile 3D C-arm is referred to as 3D C-arm, which is an upgraded version of C-arm combining traditional 2D and “CT-like mode“, and it can rapidly generate cross-sectional, sagittal, coronal tomographic images and real-time dynamic 3D stereo images during surgery. By intuitively analyzing the three-dimensional spatial relationship between the lesion and surrounding tissues, three-dimensional tomography can make the surgical simulation and the formulation of surgical plans more accurate, and is widely used in orthopedics, traumatology, urology, vascular surgery, post-operative evaluation, operating room and other fields.
The vast majority of mobile 3D C-arms on the market today can be categorized into two types of product design, isocentric and non-isocentric.
Mobile 3D C-arms with isocentric frame design, when rotating along the track, the motion trajectory is a positive circle, always keeping the shooting subject in the center of the ray beam, avoiding the motion of the C-arm frame in the non-rotating direction, reducing motion artifacts from the root, shortening the image processing process and improving image clarity.
At the same time, the isocentric mobile 3D C-arm also provides a larger C-arm opening, which provides a loose posing space that can easily snap into the surgical bed and the patient, quickly completing the posing, avoiding repeated adjustments of the C-arm position, and reducing the posing time.
In order to provide better 3D images, Perlove Medical mobile 3D C-arm PLX7500A adopts an isocentric frame, which provides fine and clear images. The C-arm opening space of up to 90cm is suitable for the size requirements of various clinical positions.
Non-isocentric mobile 3D C-arm, the trajectory is elliptical, in the acquisition of three-dimensional images, the C-arm is required to move in the horizontal and vertical directions, real-time adjustment of the position in the vertical and horizontal directions to maintain the consistency of the shooting site, so the image in the movement of artifacts to be a little more serious. And the benefit is that the frame is smaller.
When the mobile 3D C-arm does 3D rotation to capture images, how many angles are appropriate for rotation?
Schematic diagram of mobile 3D C-arm rotation angle
According to the principle of CT image reconstruction, at least 180 degrees need to be swept for complete reconstruction. If the reconstruction is based on 200 images, every point of the target object needs to appear on each of the 200 images. Based on the above principle, it is actually necessary to sweep through 180 degrees. Image sequences scanned below 180 degrees are called incomplete image reconstruction. The quality of 3D images after incomplete image reconstruction will be affected, for example, some companies use 165 degree rotation to capture images for reconstruction, and the images are not as good as 180 degree rotation to capture and rebuild the quality of 3D images Perlove Medical mobile 3D C-arm PLX7500A slides along the track with an angle greater than