CT Simulation

CT simulation uses a computerized tomography (CT) scanner to create a three dimensional model of a patient. This model is used to develop an individualized radiation treatment plan specifically for each individual patient. The model developed using this process can be used by the radiation oncologist to target the tumor while avoiding healthy tissue in order to give the best possible radiation treatment. After the patient has been scanned the model can be created in the planning computer by the dosimetrist. The radiation oncologist then maps the tumor and the surrounding regions that he wants to treat while specifying the radiation beam distribution he wants for the best possible treatment.

The simulator room is the central location for treatment planning. The dedicated radiation therapy CT scanner is here along with all the appropriate accessories (e.g. a flat table, positioning lasers, immobilization and positioning devices). Once the three dimensional model is produced, the treatment team can design the optimum radiation treatment plan and verify it before patient treatment takes place on the linear accelerator.

The simulation process also produces an image using the CT information obtained from simulation that is used during treatment to verify that the tumor is being treated correctly at the linear accelerator. This image is called a digital reconstructed radiograph (DRR). It is an image of the patient in treatment position that is sent from the planning computer to the linear accelerator. The image can be used as a reference to show that the patient is in treatment position and that the tumor is being treated according to the treatment plan. If this is not the case the radiation oncologist can see the discrepancy and make adjustments to the patients position at the linear accelerator to insure that the treatment plan is followed.

Contact Us

Phone: 717-274-7500
Address: 845 Tuck St.
 Lebanon PA
Email: info@lvcancercenter.com