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solid water phantom
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Brief description:The solid water phantom (radiation therapy dose verification phantom) is an important tool that helps radiation therapists ensure that patients receive an accurate dose, thereby improving treatment effectiveness and reducing the risk of side effects.
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Detailed introduction
A solid water phantom (radiotherapy dose verification phantom) is a device used to measure and verify the dose output of radiotherapy equipment. It usually consists of a plastic or metal structure of a specific shape and size filled with a material that simulates human tissue. This phantom can be placed in the radiation field of a radiotherapy device to simulate the dose distribution that a patient would receive during actual treatment.
The method of using the solid water phantom (radiation therapy dose verification phantom) is as follows:
1. Preparation: Before starting to use the radiotherapy dose verification phantom, the phantom needs to be cleaned and disinfected to ensure that its surface is clean and sterile. In addition, the required measuring equipment and calibration tools need to be available.
2. Phantom positioning: Place the radiotherapy dose verification phantom in the radiation field of the radiotherapy equipment, and use positioning tools to fix it in the appropriate position. This often requires accurate measurements and calculations of the phantom geometry and dimensions.
3. Measurement process: Place the radiation therapy dose verification phantom under the irradiation of the radiation therapy equipment, and use the corresponding measuring equipment to measure. During the measurement process, attention needs to be paid to maintaining the stability and consistency of the phantom to reduce measurement errors.
4. Data analysis: According to the measurement results, use corresponding software or algorithms to analyze and process the data to calculate the dose distribution inside the phantom. This usually requires accurate simulation and calculation of the absorptive properties of the phantom and the simulated tissue.
5. Result verification: Compare and verify the calculated dose distribution with the dose distribution in the actual treatment plan to ensure the accuracy and reliability of the measurement results. If the error is found to be large, the measurement and calculation need to be re-measured.
The use of radiotherapy dose verification phantom is relatively simple, but operating procedures and safety requirements need to be strictly followed to ensure the accuracy and reliability of measurement results.
Solid water phantom has the following advantages:
1. Simulate the real situation: The radiotherapy dose verification phantom can simulate the dose distribution received by patients during real treatment, thereby helping radiotherapists evaluate treatment effects and side effects risks. Compared to traditional dose measurement methods such as film or ionization chambers, phantoms can more accurately reflect actual conditions.
2. Improve accuracy: Since the radiotherapy dose verification phantom can simulate the dose distribution during real treatment, the accuracy and reliability of the measurement results can be improved. Compared with traditional measurement methods, phantoms can reduce errors caused by human tissue, organ position and other factors.
3. Convenient and fast: The method of using the radiotherapy dose verification phantom is relatively simple and does not require complex equipment and operating skills. Compared with traditional measurement methods, the use of phantoms is more convenient and faster, and measurement results can be obtained quickly.
4. Good repeatability: The production and calibration process of radiotherapy dose verification phantoms is relatively standardized, so it can ensure that different batches of phantoms are comparable and repeatable. This is important for assessing treatment efficacy and risk of side effects.
5. Reduce costs: Compared with traditional measurement methods, the use of radiation therapy dose verification phantoms can reduce costs. For example, there is no need to purchase expensive film or ionization chamber equipment, or to perform complex equipment maintenance and calibration.
Solid water phantoms can replace traditional water tanks for routine testing of linear accelerator photon beams* Product Characteristics Each Water is tested for water equivalence in an independent calibration laboratory before being put into use. The phantom pieces produced from this special material are strong enough and will not stick together when stacked and stored. Changes in temperature and humidity do not affect the water in any way. Unique sheet design with cavity, the cavity can accommodate parallel plate ionization chamber or finger ionization chamber.
Solid water phantom product specifications:
Density: 1.03g/cm3
Thickness error: ±0.15mm
Length and width error: ±0.5mm
Physical form: square sheet,
Standard size: 30cm×30cm
Standard sheet thickness: 0.2, 0.3, 0.5, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 7.0
Standard size: 20cm, 30cm, 40cm standard
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