Can breast implants which are placed under the muscle effect the results of a chest x-ray or CT scan?

Hi there. CT and chest X ray and even mammogram are all effective with sub- muscular implants. If there is any doubt then MRI is often used to visualize the breast tissue.

Breast implants will be seen on these imaging studies; generally speaking, they do not interfere with "visualization" of your anatomy.  For more specifics, discuss your concerns/questions with the involved radiologists. Best wishes.

Depending on the reason for the radiologic exam, it may require additional views to see what they are looking for.