Gynae BT_Lucknow_2018

Computed Tomography

Improvement of images through specific protocols

• Contrast enhanced CT simulator images

• Delayed images or retrograde injection of contrast for improved bladder delineation • Specific protocols required regarding contrast flow, image aquisition delay • Safety precautions (allergic reactions, resuscitation equipment, presence of physician during imaging).

Bladder contrast: influence on dose distribution In conformal radiotherapy can be avoided Treatment planning systems: contouring of the contrasted bladder and asigning density value