Can my radix be widened?

The problem that you are highlighting can be addressed by surgical or nonsurgical techniques. 
The advantage of a non-surgical approach lies in its reversibility. 
3D imaging can also help you to define your goals.
The surgical approach can be based on onlay of material to create additional width, or spreader grafts to maintain the nasal bones further away from the septum. 
In some instances, the change that is perceived to be exaggerated comes from loss of some of the squareness in the upper part of the bridge, with the dorsal aesthetic lines becoming too close together. This can be identified in pre-op photographs and in computer simulations. Such a change does not lend itself to fillers which generally produce smoother contours and would be more suitable for surgery.

This area can be widened. The best place to start might be dermal-fillers for this area. It can help you decide on what you're looking for in terms of a final result. Also, you may be happy with the result and avoid revision surgery all together. Best of luck.