Radiotherapy Simulator is useful for localization of tumor and radiotherapy plan verification prior to delivering radiation therapy to the cancer patients. It is an essential tool for precise delivery of the radiotherapy treatment. BARC has developed the technology for indigenous Digital Radiotherapy Simulator.
Radiotherapy Simulator is useful to diagnose the physical extent of the tumor and its relation to the surrounding tissues for proper selection of the size and orientation of the radiotherapy beams. It is also useful to verify a treatment plan. Radiotherapy simulator is an essential tool for improving the quality of radiotherapy for the treatment of cancer patients. BARC has developed the technology for indigenous Digital Radiotherapy Simulator
Radiation therapy is one of the established modes of cancer treatment. Radiotherapy Simulator helps to diagnose the physical extent of the tumor and its relation to the surrounding tissues for proper selection of the size and orientation of the radiotherapy beams. It is also useful to verify a treatment plan. Radiotherapy simulator is an essential tool for improving the quality of radiotherapy for the treatment of cancer patients.
Major sub-systems in the radiotherapy simulator are gantry, collimator, x-ray tube, imaging unit, patient support/positioning system (couch), and remote control console. It is similar to a external beam radiotherapy machine except that diagnostic x-ray is used as source of radiation. The variable focus to axis distance makes it suitable for therapy simulation for a number of teletherapy machines. The collimated x-ray beam passes through the patient (lying on the couch) from one side and the attenuated beam is converted to digital image by an image intensifier coupled with CCD camera system located on the other side. The image intensifier support arm has motorized motions for remote and interactive positioning of the image intensifier at the region of interest. All the motions of the gantry, collimator, and the image intensifier support arm can be controlled through these keypads (on the couch) as well as from the remote control console.
The captured image can be processed / analyzed almost instantly to extract detail information about the tumor location, its volume, and closeness to critical structures. These images will be transferred into the treatment planning computer system for formulating actual radiation dose delivery plan. Immobilization device may be fabricated during this procedure.
|1||Focus to axis distance (FAD)||800-1200 mm|
|2||Isocenter height||1280 mm|
|3||Gantry (C-Arm) rotation||Motorized, isocentric design, ± 185 deg.|
|4||Collimator rotation||Motorized, ± 100 deg|
|5||Field Size (shielding jaws)||450 mm x 450 mm (at FAD 1000mm)|
|6||Field Size (delineating wires)||400 mm x 400 mm (at FAD 1000mm)|
|7||Patient positioning table||Motorized- four motions|
|9||X-Ray Tube||Focal spot: 0.4 & 0.8; Target angle: 15deg|
|10||Image Intensifier||Tri-field, 290mm dia.(max.)|
|11||Supply voltage||Three phase, 400V AC|
|12||Compliance to Intl. Standards||IEC601-1, IEC60601-2-29, MDD 93/42/EEC|
|13||Regulatory approval||Atomic Energy Regulatory Board, INDIA|
The job involves high precision fabrication, assembly, extensive QA testing as per national and international requirements. Manufacturing processes involved :
Machine Tools/ Equipments needed for Manufacture
Manpower consisting of 5 engineers (2-mechanical, 1- electrical, 1-electronics, 1-computer) and 10 technicians for fabrication, assembly and testing of the components, sub-assemblies, the complete unit and its performance are required. Additionally, medical physicist/radiation safety officer are required for ensuring conformity to clinical requirement and radiation safety to the working personnel respectively. Experience in Quality Assurance Requirements, Testing, Certification and Regulatory Framework for this type of Medical Electrical Equipments is essential