objectives: bone quality and quantity assessment is one of the most important steps in implant treatment planning. different methods such as computed tomography (ct) and recently suggested cone beam computed tomography (cbct) with lower radiation dose and less time and cost are used for bone density assessment. this in vitro study aimed to compare the tissue density values in hounsfield units (...

OBJECTIVE To review the presentation and natural history of children with vascular rings and present management guidelines. METHODS Retrospective study of tertiary care pediatric medical center charts from 1991 to 2002. RESULTS There were 37 males and 27 females with a diagnosis of vascular rings. At presentation, 91% of patients had airway symptoms and 47% had esophageal symptoms. Airway s...

Prostate cancer is one of the most common tumors male urinary system and nearly causing any symptoms or signs in early stages. Complication as anemia has been rarely reported non-metastatic prostate cancer. We present herein an extremely rare case a local occurring 76-yearold man with complication severe anemia. As he was diagnosed cancer, presented rising hemoglobin level even down-regulated t...

Thorax radiography examination in pediatric patients is one of the most frequent examinations because many abnormalities that occur thorax and have a high probability at children's age. Pediatric are assisted by companion from adult patient's family. Calculation measurement radiation dose received very important as they room with patient during imaging process. And no matter how small companion...

INTRODUCTION Although spontaneous regression (SR) of anterior mediastinal seminoma is very rare with normalization of β-human chorionic gonadotropin (β-hCG) level, video-assisted thoracic surgery (VATS) is the most effective solution for definite diagnosis of indeterminate anterior mediastinal masses. DIAGNOSIS, THERAPEUTIC INTERVENTIONS, AND OUTCOMES A rare case of an asymptomatic 37-year-ol...

Current techniques used for total knee arthroplasty rely on conventional instrumentation that violates the intramedullary canals. Accuracy of the instrumentation is questionable, and assembly and disposal of the numerous pieces is time consuming. Navigation techniques are more accurate, but their broad application is limited by cost and complexity. We aimed to prove a new concept of computer-as...

Computer-assisted virtual surgery is a rapidly emerging topic in the dentistry field (1). Recent developments of high resolution computed tomography (CT) has enabled a better understanding of the complex anatomical structure. The combination of high resolution CT, three-dimensional reformatted images, and stereolithographic models have improved the convenience and accuracy in oral and maxillofa...