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Purpose: the aim of the article is to analyze the Korean economic strategy from the beginning of its development until modern stage. Examination of how this strategy has changed depending on changes within domestic and international economic environment, assumptions, set goals, their effectiveness and significance of all the taken measures. It will demonstrate waypoints for the future economic development and will become a trigger towards recognition of the successful development of the Korean economy by other countries. Methods: the methodological bases of this article are the economic and statistical methods of analysis of the Korean economys, graphical methods displaying economic indicators. Results: economic history of South Korea over the past century shows the positive and negative factors of the development from an economically weak country into a developing country. The history of the Japanese occupation of Korea, lasting from 1910 to 1945, showed that for a country which has lost its national sovereignty, expropriated the state's economy has no effect after the restoration of independence, and that the economy cannot develop in conditions of chaos within the political, economic and social spheres. Even after the establishment of a military dictatorship, it is possible to note that despite limitations of citizens’ rights, the economy can still grow if the people want it. In addition to the development of internal political system, unstable factors in the process of promotion of social reforms and hastily adopted policy of "open doors" in order to enhance the international status are unreasonable political, economic and social changes. In turn, the inability to control currency exchange in Asian countries, which is a policy of economic development, has shown the existence of a risk of national bankruptcy. Moreover, the adoption of policies of excessive decrease of interest rates in order to revive the recession may be counterproductive in countries with a developed economies and lead to an economic crisis. Conclusions and Relevance: for the last century, the changes that happened in the economic history of the Republic of Korea made it the model case of progressive economic development of developing countries. The history of Korea's economic development suggests presence of both positive and negative factors. Within the positive factors of the economic development of the Republic of Korea it is possible to note: planning of economic development, a potential for development of technology, ability to control currency, financial crisis management and free trade agreements. Negative factors for economic development were the loss of national sovereignty, disturbances in political, economic and social fields. In addition, people's desire to develop the national economy shows that the economic development could be accomplished successfully.

Background: Patient‐specific QA verification ensures patient safety and treatment by verifying radiation delivery and dose calculations in treatment plans for errors. However, a two‐dimensional (2D) dose distribution is insufficient for detecting information on the three‐dimensional (3D) dose delivered to the patient. In addition, 3D radiochromic plastic dosimeters (RPDs) such as PRESAGE® represent the volume effect in which the dosimeters have different sensitivities according to the size of the dosimeters. Therefore, to solve the volume effect, a Quasi‐3D dosimetry system was proposed to perform patient‐specific QA using predetermined‐sized and multiple RPDs. Purpose: For patient‐specific quality assurance (QA) in radiation treatment, this study aims to assess a quasi‐3D dosimetry system using an RPD. Methods: Gamma analysis was performed to verify the agreement between the measured and estimated dose distributions of intensity‐modulated radiotherapy (IMRT) and volumetric modulated arc therapy (VMAT). We fabricated cylindrical RPDs and a quasi‐3D dosimetry phantom. A practicability test for a pancreatic patient utilized a quasi‐3D dosimetry device, an in‐house RPD, and a quasi‐3D phantom. The dose distribution of the VMAT design dictated the placement of nine RPDs. Moreover, a 2D diode array detector was used for 2D gamma analysis (MapCHECK2). The patient‐specific QA was performed for IMRT, VMAT, and stereotactic ablative radiotherapy (SABR) in 20 prostate and head‐and‐neck patients. For each patient, six RPDs were positioned according to the dose distribution. VMAT SABR and IMRT/VMAT plans employed a 2%/2 mm gamma criterion, whereas IMRT/VMAT plans used a 3%/2 mm gamma criterion, a 10% threshold value, and a 90% passing rate tolerance. 3D gamma analysis was conducted using the 3D Slicer software. Results: The average gamma passing rates with 2%/2 mm and 3%/3 mm criteria for relative dose distribution were 91.6% ± 1.4% and 99.4% ± 0.7% for the 3D gamma analysis using the quasi‐3D dosimetry system, respectively, and 97.5% and 99.3% for 2D gamma analysis using MapCHECK2, respectively. The 3D gamma analysis for patient‐specific QA of 20 patients showed passing rates of over 90% with 2%/2 mm, 3%/2 mm, and 3%/3 mm criteria. Conclusions: The quasi‐3D dosimetry system was evaluated by performing patient‐specific QAs with RPDs and quasi‐3D phantom. The gamma indices for all RPDs showed more than 90% for 2%/2 mm, 3%/2 mm, and 3%/3 mm criteria. We verified the feasibility of a quasi‐3D dosimetry system by performing the conventional patient‐specific QA with the quasi‐3D dosimeters. [ABSTRACT FROM AUTHOR]