Radiation dose reduction during hysterosalpingography: an application of scanning-beam digital radiography

Hysterosalpingography was performed in 31 patients by means of a low-dose scanning-beam digital radiographic system. The technique permits adequate evaluation of gynecologic abnormalities while allowing significant reduction in radiation: 2.4-mR (6.1 X 10(-7) C/kg) exposure to the skin and 0.7-mrad (7 X 10(-6) Gy) mean dose to the ovaries per image obtained. Sixteen patients demonstrated readily recognizable and documented abnormalities, corroborated by laparoscopy, laparotomy, or other supportive evidence.     

采用直接血管成形术治疗的急性心肌梗死患者中入院心电图存在左束支、右束支与无束支传导阻滞的预后比较：来自多项急性心肌梗死直接血管成形术试验

急性心肌梗死患者出现束支传导阻滞（BBB）被认为与预后差有关。这种观点在血管成形术时代是否正确尚不清楚。本研究旨在评估采用直接血管成形术治疗的急性心肌梗死伴BBB患者的预后。评估了急性心肌梗死直接血管成形术试验中3053例接受急诊导管术的患者。将入院心电图存在左束支传导阻滞的患者（LBBB，n=48，1．6％）与右束支传导阻滞患者（RBBB，n=95，3．1％）或无BBB患者（n=2910，95．3％）进行比较。具有BBB的患者年龄较大，更多见糖尿病、外周血管疾病和曾行冠状动脉搭桥术，射血分数较低，多支血管病变多见。     

Solitary bronchioloalveolar carcinoma: CT criteria

The computed tomographic (CT) scans of 30 patients with solitary bronchioloalveolar carcinoma were reviewed. Common features at CT included the peripheral or subpleural location of a pulmonary mass (25 cases), pseudocavitation (18 cases), heterogeneous attenuation (17 cases), irregular margins forming a star pattern (22 cases), and pleural tags (21 cases). Using these CT criteria, four independent observers attempted to identify cases of bronchioloalveolar carcinoma from a larger sample of lung cancers and benign lesions by categorizing a series of test cases into four probability categories. Although the bronchioloalveolar carcinomas were correctly ranked in the two highest probability categories 75% of the time (in 45 of 60 cases), there was considerable overlap with other lung lesions, particularly with adenocarcinoma and large cell undifferentiated carcinoma. However, even though the typical features of bronchioloalveolar carcinoma are not invariable or highly specific, they are characteristic enough to suggest the diagnosis.