No abstract available.
Radiation, Ionizing

No abstract available.
Genetics ; Radiation, Ionizing

Radiation necrosis is the main obstacle for radiosurgery delivering high dose ionizing radiation inhomogeneously into small field of lesion with spatial accuracy. The complication probability is closely related to dose-volume effect. To reduce the complication rate, the optimum dose should e prescribed for the isodose curve enclosing the target lesion according to the lesion volume and isodose fall-off. However, the shape, volume and isodose fall-off of the lesions are different from each other. To choose the optimum doses for radiosurgery in each case, it is necessary to have a reasonable model for predicting dose-volume effects. Flickinger developed an integrated logistic formula using normalized total dose(NTD) as a reasonable model to predict complications from gamma knife radiosurgery. The authors developed a computer program to calculate the risk probability using that formula. As previously emphasized, the risk probability derived from the formula is useful and indispensable as a guidance to dose prescription in gamma knife surgery.
Necrosis ; Prescriptions* ; Radiation, Ionizing ; Radiosurgery*

Fluoroscopy-induced chronic radiation dermatitis (FICRD) is a cutaneous disorder that results from prolonged exposure to ionizing radiation during interventional procedures. With the expanded use of interventional procedures, there is increased fluoroscopic exposure. However, diagnosis and treatment of such disorder remain difficult. Herein, we report on a case of FICRD that occurred in the right subscapular area.
Angioplasty, Balloon, Coronary ; Dermatitis ; Radiation, Ionizing

Radiofrequency catheter ablation has been used for certain arrhythmic disorders for less than a decade, and has shown effectiveness in many cases. However, due to the complex nature of atrial fibrillation and high doses of ionizing radiation exposure during the procedure, radiofrequency catheter ablation has the possibility of inducing radiation damage. We herein describe one case of chronic radiodermatitis following radiofrequency catheter ablation for atrial fibrillation, a subject which has not been reported so far.
Atrial Fibrillation* ; Catheter Ablation* ; Radiation, Ionizing ; Radiodermatitis*

The role of ascorbate as an antioxidant in the prevention and cure of disease that result from free radicals has been of considerable interest and controversy lately. As an antioxidant, we can expect it to protect against radiation damage caused by free radicals that are produced when radiation, especially sparsely ionizing radiation, interacts with living tissues. The plasma and whole blood concentration of ascorbate was analyzed before and just after the radiation therapy for the purpose of estimating the consumption amount of ascorbate during radiotherapy. Whole blood ascorbate was decreased from 1.82 mg/dl to 1.58 mg/dl, plasma ascorbate was decreased from 1.13 mg/dl to 1.08 mg/dl, and urine ascorbate was decreased from 9.33 mg/dl to 6.96 mg/dl after radiotherapy. Although the difference was not significant statistically, further human study should be followed to define the role of ascorbate as a radioprotector.
Free Radicals ; Humans ; Plasma* ; Radiation, Ionizing ; Radiotherapy*

No abstract available.
Humans ; Radiation Injuries/etiology ; Radiation, Ionizing ; Radiotherapy Dosage ; *Societies, Scientific

Although the diagnostic information provided by radiographs may be of definite benefit to the patients, the radiographic examination does carry the potential for harm from exposure to ionizing radiation. Therefore we should try to expose radiation as low as reasonably achievable and to give diagnostic information to patients as much as possible. All of dentists should have competence in radiation protection. I wish to deal with what we should do for the optimization of radiation protection in dental clinic.
Dental Clinics* ; Dentists ; Humans ; Mental Competency ; Radiation Protection* ; Radiation, Ionizing

Ionizing radiation is a well-known carcinogen, and is listed as one carcinogenic agent of occupational cancer. Given the increase in the number of workers exposed to radiation, as well as the increase in concern regarding occupational cancer, the number of radiation-related occupational cancer claims is expected to increase. Unlike exposure assessment of other carcinogenic agents in the workplace, such as asbestos and benzene, radiation exposure is usually assessed on an individual basis with personal dosimeters, which makes it feasible to assess whether a worker's cancer occurrence is associated with their individual exposure. However, given the absence of a threshold dose for cancer initiation, it remains difficult to identify radiation exposure as the root cause of occupational cancer. Moreover, the association between cancer and radiation exposure in the workplace has not been clearly established due to a lack of scientific evidence. Therefore, criteria for the recognition of radiation-related occupational cancer should be carefully reviewed and updated with new scientific evidence and social consensus. The current criteria in Korea are valid in terms of eligible radiogenic cancer sites, adequate latent period, assessment of radiation exposure, and probability of causation. However, reducing uncertainty with respect to the determination of causation between exposure and cancer and developing more specific criteria that considers mixed exposure to radiation and other carcinogenic agents remains an important open question.
Asbestos ; Benzene ; Consensus ; Humans ; Korea ; Radiation Exposure ; Radiation, Ionizing ; Uncertainty

Imaging has been a wonderful addition to diagnosing cardiac and other non-cardiac problems. However, there has been a huge increase in the number of procedures related to the use of ionizing radiation in the United States over the last several years. In 2010 clinical cardiologists use all available imaging modalities to optimally manage patients with cardiovascular disease. This article will focus only on imaging requiring ionizing radiation. The purpose of this report is to highlight the amount of radiation exposure used to investigate cardiac and non-cardiac disease states and to call attention to the potential short and long term effects of ionizing radiation on your patients.
Diagnostic Imaging ; adverse effects ; Humans ; Radiation Protection ; Radiation, Ionizing