IMRT: Intensity-Modulated Radiotherapy
About the Treatment
In IMRT computer-controlled linear accelerators are used to deliver precise radiation doses to specific areas. Treatment is planned by using 3-D computed tomography (CT) or magnetic resonance (MRI) images of the patient along with computerised dosage calculations to determine the dose intensity pattern that will conform to the tumour r shape. Thus, combinations of multiple intensity-modulated fields coming from different beam directions produce a custom tailored radiation dose that maximises tumour dose & prevents damage to the adjacent normal tissues.
IMRT takes longer treatment time along with additional planning and safety checks. Radiation Therapy, including Intensity-Modulated Radiotherapy, stops cancer cells from dividing and growing, therefore slowing/ stopping tumour growth and also eliminating them
- Prostate cancers
- Head and neck cancer
- Cancer of central nervous system
- Rare cases of breast, thyroid, lung, gastrointestinal & gynaecologic malignancies
- Certain types of sarcomas
- Paediatric malignancies
- Patient's medical history is evaluated by physician
- Any allergies should be informed.
- A CT scan is done.
- If the patient is breastfeeding or might be pregnant, the doctor must be notified.
- Occasionally, MRI & PET Scan is used for IMRT planning
- You may require MRI or PET scans
- Depending on the procedure some of the bowel or bladder preparations are essential
- The treatment team carefully plans the treatment using the scan images.
- Advanced computerised dose calculations are used to find the dose strength pattern that best matches the tumour shape.
- Proper skin marking of the area to be treated is done
- To keep the treatment area still, moulds and masks are used
- After this final treatment plan is decided.
- Multiple treatment sessions are required for IMRT
- An Informed Consent Form is filled
- Patient is positioned correctly & moulds are placed accordingly
- The scanner part of the machine takes a scan before each treatment session.
- The patient may be asked to hold breath or take shallow breaths during the treatment.
- The process may take 15 – 30 minutes
- No specific post-operative care is needed.
- The patient may require medications to overcome the side effects of radiation therapy.
- Tiredness or fatigue
- Skin problems
- Hair loss in the treatment area
- Swallowing, eating and digestion problems
- Nausea and vomiting
- Soreness and swelling in the treatment area
- Urinary and bladder changes
- Brain changes
- Spinal cord changes
- Lung changes
- Kidney changes
- Colon and rectal changes
- Joint changes
- Secondary cancer
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