Computed Tomography Using a Low Tube Voltage Technique for Acute Ischemic Stroke

Computed tomography (CT) is commonly used to assess for cerebral hemorrhage and acute ischemic stroke. We investigated the accuracy of CT using a low tube voltage technique in acute ischemic stroke. We compared the standard deviation (SD), contrast between gray and white matter, and contrast-to-noise ratio (CNR) between three groups (120 kV 500 mAs, 100 kV 850 mAs, and 100 kV 750 mAs using hybrid iterative reconstruction) in 50 patients without lesions, and visual evaluation using the normalized rank approach was also performed. The mean value of SD was 4.02, 4.22, and 4.04, respectively, and the contrast between gray and white matter was 7.08, 8.66, and 8.68 HU, respectively;in addition, the CNR was 1.77, 2.06, and 2.15, respectively. The difference between the 100 kV and 120 kV groups was significant (p 0.01). Visual evaluation showed a significant difference between the 100 and 120 kV groups (p 0.05).

腹腔镜胃腔内手术治疗早期胃癌(附8例报告)

目的 设计一种全新的治疗胃粘膜或粘膜下病变的腹腔镜手术方法。方法 三个穿刺套管均通过腹壁及胃壁穿刺置入胃腔 ,在胃腔内采用腹腔镜器械通过监视器图像进行手术。结果 8例中 ,6例早期胃癌 ,1例粘膜下平滑肌瘤 ,1例巨大息肉 ,均未出现并发症 ,亦无中转开腹。结论 对于纤维胃镜无法治疗的胃粘膜或粘膜下病变 ,采用腹腔镜胃腔内手术其方法简便、安全。