Introduction: The Republic of Korea has developed a national standard based on which diagnostic X-ray equipment must be tested every 3 years. Accordingly, the performance of X-ray equipment used in all hospitals is evaluated by national certification bodies in compliance with the safety management regulations for X-ray equipment. However, if the equipment i...

J Korean Assoc Oral Maxillofac Surg 2012;38:366-70) Initially described in 1929, Warthin’s tumor is a benign neoplasm predominantly found in the parotid gland of the salivary glands. Warthin’s tumor is synonymous for cystadenoma lymphomatosum, adenolymphoma, and cystadenolymphoma. This tumor usually causes minimal pain, but the patient may complain of tinnitus, pain in the ear, or deafness. The...

methods retrospective cohort study of blunt trauma patients with rib fractures at a level i trauma center that had both a cxr and a ct chest. the ct finding of ≥ 3 additional fractures in patients with ≤ 3 rib fractures on cxr was considered clinically meaningful. student’s t-test and chi-square analysis were used for comparison. results we identified 499 patients with rib fractures: 93 (18.6%)...

introduction hadron-therapy is an effective technique used to treat tumors that are located between or nearby vital organs. the italian national center of oncological hadron-therapy (cnao) has been realized as the first facility in italy to treat very difficult tumors with protons and carbon ions. the on-line monitor system for cnao has been developed by the department of physics of the univers...

A simple, consistent, semi-quantitative description of the neutron dose received by patients undergoing cancer treatment by X-ray therapy is given. This discussion is intended as a contribution to the AAPM Task Group on Neutrons from High-Energy X-Ray Machines. Submitted for Publication * Work supported'by the Department of Energy, contract DE-AC03-76SF00515.

Availability, ease of use, relative low cost, and minimal radiation exposure have made dual-energy x-ray absorptiometry the most widely used technique worldwide to obtain bone measurements for both research and clinical purposes in pediatric populations. However, errors related to growth and maturity significantly diminish the accuracy of dual-energy x-ray absorptiometry bone measurements. Seve...

background: bisphosphonates (bps) are used extensively for managing the osteoporosis. there are some controversies on atypical fractures of femur that associated with increase in cortical thickness (ct) and bps' use. in this study, the effects of alendronate consumption were studied on femoral ct as a predictor for atypical fracture.   methods: forty nine post-menopausal women aged 50-70 years ...

OBJECTIVE Remineralization is an indispensable phenomenon during the natural healing process of enamel decay. The incorporation of zinc (Zn) into enamel crystal could accelerate this remineralization. The present study was designed to investigate the concentration and distribution of Zn in remineralized enamel after gum chewing. METHODS The experiment was performed at the Photon Factory. Sync...