CT Simulation Procedure

Mask preparation, ct sim

1. CT SIMULATION Subrata Das RTT, APEX Hospitals, Jaipur, Rajasthan 302017

2. CONTENTS OF THIS PPT Introduction of Radiotherapy Mould Room Procedure CT Simulation procedure Linear Accelersator.

3. PPT STAGES FIRST We are going to study about Radiotherapy and how it works? SECOND What is linear Accelerator, how it destroy cancer cell? THIRD Mould room procedure & thermoplastic mask preparation?

4. Introduction of Radiotherapy Radiation therapy  (also called radiotherapy) is a cancer treatment that uses high doses of radiation to kill cancer cells and shrink tumors. Radiotherapy  works by destroying cancer cells in the area that's being treated by damaging the DNA . Normal cells can also be damaged by radiotherapy, which may cause side effects. Cancer cells cannot repair themselves after radiotherapy, but normal cells are better at repairing.

5. Linear Accelerator A linear accelerator, or LINAC, is a machine that is commonly used to deliver external beam radiation treatments to cancer patients. For the customized delivery of radiation therapy, a linear accelerator is programmed prior to each session to deliver high-energy X-rays that conform to the specific size, shape and location of a tumor. To meet a patient’s specific needs, a radiation oncologist will work with a dosimetrist and a medical physicist to develop an individualized treatment plan, including an appropriate radiation treatment delivery method, schedule and dosage. The medical professional who operates the LINAC is known as a radiation therapist .

6. Mould Room Procedure (Mask Preparation) Some patients need a mould or mask to be made in order to make sure that they do not move and that they are in the same place when having their radiotherapy treatment. If the patent having radiotherapy to his head, neck, arm or leg, we may need to have a mask or mould made before start treatment. The mould room we will explain everything about making a mask to patient when patient attend the mould room. The masks are made of a material which becomes pliable when it has been warmed up. The mould room staff place a sheet of this special material into a warm water bath and when the plastic  is at the correct temperature it is placed carefully on patient face. We use our hands to gently shape the plastic on patient face so that it forms a close fitting mask. Continue..

7. When the plastic has cooled down, it becomes stiff. Holes are cut out for patient mouth or tracheostomy (if the patient have one) in the mask. Patient can see and breathe normally with the mask on. Making and wearing the mask is painless. The mask has plastic anchor points which allow it to be connected to the Linac table. This will make sure that patient do not move when patient are having your radiotherapy treatment. Making a mask can take up to 30 minutes as we need it to fit exactly to patient.

8. CT Simulation Step By Step 01 Presimulation Planning. 2. Room Preparation. 3. Explanation of procedure. 02 Patient Positioning and Immobilization. 2. Operation of simulation controls. 03 1. Setting Field Size Paramters. 2. Selecting exposure Techniques. 04 Radiographic Exposure. 2. Documenting Patient Data..

9. —Wilhelm R ö ntgen “I Investigate, it seemd at first a new kind of invisivle light it was clearly something new something un recorded. There is much to do .”

10. Patients are imaged on a CT scanner  specially configured to acquire three dimensional images used for treatment planning . The CT scanner allows the radiation oncologist to localize the tumor and surrounding areas that will require radiation treatments. PURPOSE OF CT SIMULATION

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