Hyemin Park

• Doctor of Philosophy
• Masan University

The clinical anteroposterior (AP) chest images taken with a mobile radiography system were analyzed in this study to utilize the clinical exposure index (EI) as a patient dose-monitoring tool. The digital imaging and communications in medicine header of 6048 data points exposed under the 90 kVp and 2.5 mAs were extracted using Python for identifyin...

There are no specific limits on patient dose for medical radiation. However, optimizing patient dosage is crucial, and diagnostic reference levels (DRLs) serve as valuable tools for this purpose. DRLs can be set at the national, regional, or institutional level, and regular revisions are recommended. In the Republic of Korea, the Korea Disease Cont...

Background: Light and portable handheld X-ray devices are being used more often for diagnosis because they allow radiography procedures to be performed on patients in settings where there may not be stationary X-ray devices, such as islands or mountainous regions. In this study, the performances of handheld X-ray devices (HXD) and stationary X-ray...

Background: In 2021, the Korean government proposed a new CT diagnostic reference level. This study performed a nationwide survey and developed new DRLs and AD for 13 common CT examinations. We compared other countries’ DRLs for CT examinations. Methods: This study investigated the CTDIvol and DLP of the 12 types of CT protocols for adults and brai...

The International Electrotechnical Commission (IEC) 62494-1 has defined the exposure index (EI) that have a proportional relationship with the dose incident on the image receptor, and target exposure index (EI T), deviation index (DI). In this study, an appropriate EI T for skull radiography was established through the diagnostic reference level (D...

Background: The International Electrotechnical Commission established the concept of the exposure index (EI), target exposure index (EIT) and deviation index (DI). Some studies have conducted to utilize the EI as a patient dose monitoring tool in the digital radiography (DR) system. Objective: To establish the appropriate clinical EIT, this stud...

Background: Infants admitted to neonate intensive care units (NICUs) are placed in incubators to maintain body temperature and condition, which undergo normal radiographs and are exposed to radiation. Furthermore, different incubator structures in different hospitals exhibit varying object to image receptor distance (OID), source to image receptor...

Intra-hospital transport is associated with fatal risks for the occupants of an intensive care unit (ICU). Thus, mobile CT is used in ICUs. In this study, two-dimensional equivalent dose distribution data were expanded using the inverse square law of distance to identify the potential exposure of radiologic technologists and public and the maximum...

Cardiac angiography to visualize the cardiac coronary artery for lesions causes a lot of radiation exposure dose to the interventional cardiologist. We evaluated the occupational radiation exposure to the interventional cardiologist based on changes to the angle of the X-ray tube used in cardiac angiography and calculated the conversion factor for...

In radiography, the exposure index (EI), as per the International Electrotechnical Commission standard, depends on the incident beam quality and exposure dose to the digital radiography system. Today automatic exposure control (AEC) systems are commonly employed to obtain the optimal image quality. An AEC system can maintain a constant incident exp...

The International Electrotechnical Commission introduced the concepts of exposure index (EI), target exposure index (EI T) and deviation index (DI) to manage and optimize patient dose in real time. In this study, we have proposed an appropriate method for setting the EI T based on the Korean national diagnostic reference levels (DRLs). Furthermore,...

During interventional cardiological procedures, operators are exposed to patients’ scatter radiation. Therefore, we measured the radiation exposure of the operator’s eyeball, thyroid, and chest wall during angiography. We used the optically stimulated luminescence dosimeter in the anthropomorphic phantom and developed Monte Carlo simulations using...

International Electrotechnical Commission (IEC) established the framework for the use of exposure index (EI) for evaluating the exposure conditions with various digital systems. In this study, we investigated the feasibility of EI, as per the IEC, by comparing the EIs obtained through manual calculated and that displayed on the console of two compu...