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Immobilizations devices
The document discusses immobilization devices used in radiation therapy to restrict patient movement and improve treatment accuracy. It defines immobilization devices and lists their benefits, such as increased target accuracy and patient comfort. A brief history of immobilization methods is provided, from simple techniques like sand bags to more advanced custom devices. Factors to consider when selecting a device are outlined, including cost, accuracy, and compatibility. Common frame-based and frameless immobilization devices are described. Finally, the document discusses sources of error that devices aim to reduce, such as localization and immobilization errors.
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Immobilizations devices
- 1. Immobilizations devices Present.-Ambuj kumar, BMTR 2 nd year 2010-13 batch. Support.- Akhil chaudhary,BMTR, 2 year 2010-13 nd Moderat.- MR. Randeep Singh Bedi, seniour RTT at RGCI & RC , Faculty BMTR GGSIPU.
- 2. Definition Devices used to lock the patient’s target anatomy to restrict the movement of that site (within limit) for precise dose delivery which leads to achieve our goals which is fire maximum dose on target and possibly minimum dose to normal tissues. why ? increase target accuracy easy to use quick to set up comfortable for the patient durable enough to withstand an entire course of treatment increase patient throughput reimbursable under complex treatment device
- 3. Aim • Although theprimary goal of immobilization system is to limit patient motion and reduce the probability of major positioning errors, there are other benefits as well. • A well constructed immobilizing system can reduce the time for daily patient set up. • It can make the patient feel more secure and less apprehensive. • It can reduce the reliance on patient co-operation and alertness, and it can help to stabilize the relationship between external skin marks and internal structures.
- 4. History sand bags tape bite block plaster casts “home-made devices”
- 5. Considerations for selecting a device cost convenience accuracy speed compatibility attenuation durability
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- 10. frameless Immobilization devices Positioning & support devices • Orfit cast • AIO • Vac lok • Base plate • Thorax positioning board • Velcro Straps • Belly board • Alfa cradle • Leg rest • Pituitary board • Knee rest • Breast board • Grip poles • Customized foam pads • Head supports • Hand protudrance • Wing board • Prone pillow • Indexing bar • Prone head support
- 12. Errors Localization Error results from the failure to appreciate the full extent of the disease or to design adequate treatment fields Immobilization Error occurs as a result of displacement of the treatment fields relative to the intended treatment volume