Isodose Map

The Isodose map is one of the main tools in radiation therapy that helps doctors visualize the distribution of absorbed doses in the patient's body. It is a graphical representation of the dose field, which shows the distribution of the radiation dose depending on the distance from the radiation source.

The Isodose map is used to plan treatment and evaluate the effectiveness of treatment. It allows doctors to determine which areas of the body are receiving too much or too little of the dose, and to assess the distribution of the dose in different organs and tissues.

When creating an Isodose map, the doctor uses special software to calculate the dose distribution in the patient's body based on specified treatment parameters, such as dose rate, exposure time, etc. The program then creates a graph that displays the dose distribution as isodose lines—curves that show what dose different areas of the body receive.

The doctor can use the Isodose chart to determine the optimal treatment plan, taking into account the distribution of dose in different areas of the patient's body. He may change treatment parameters to achieve a more even dose distribution and reduce the risk of side effects.

In addition, the Isodose card can be used to monitor the effectiveness of treatment. After treatment is completed, the physician can compare the dose distribution on the Isodose chart before and after treatment to evaluate how effective the treatment was and what changes have occurred in the dose distribution.

Thus, the Isodose map is an important tool in radiotherapy and allows doctors to more accurately plan treatment and monitor its effectiveness.

In modern medicine, radiobiology is an important discipline and one of the key sections of radiology. Among the branches of radiobiology, the concept of dose curve or isodose occupies a special place. To understand this issue, let's first study the terms that we will use later in the article.

Radiation dose (often the term irradiation is more commonly used in radiation biophysics) is a physical characteristic that describes how much energy of ionizing radiation is absorbed or added by biological tissue per unit mass. A unit of measurement used in the International System of Units called the rem (biological equivalent of a roentgen). 1 millirem is equal to approximately 0.01 millisievert, which is close to the safety unit, or rem (1 rem = 1 millisievert).

Radiation intensity is the amount of radiation energy reaching the absorber per unit time. Units of measurement are roentgens per second (R/s), Bely-Ervezy (BdE/s). Since the energy approaching a material equals its heating, any form of medical radiation can be defined as x-ray therapy. In production, we use neutron radiation (short monoenergetic photons with an energy close to thermal neutrons - which means less than 50 eV) for industrial flaw detection of microstructures and structures in precision engineering, when working with materials that are particularly sensitive to radiation for the production of semiconductors. Electromagnetic radiation (including radio waves and microwaves) also produces X-rays, but at a very high frequency. The thermal electron furnace is one of the simplest types of X-ray production equipment that uses high-frequency electromagnetic radiation; frequency determines the wavelength of x-rays.

X-ray machine –