扫描方案:3组扫描部位的管电压均为120 kV,均使用西门子CT中的自动管电流调节(CARE Dose 4D)技术。胸部扫描管电流110 mAs,螺距为1.2,探测器准直64×0.6 mm,重建层厚5 mm,层间距5 mm。上腹部及腹部-盆腔扫描参考毫安秒为190 mAs,...
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The choice of the weight volume has an important influence on the result, as will be discussed in the results section. In this work, we consider four different cases by combining two variables: (1) whether wj=0 is possible or not, and (2) whether the weight volume is discrete or contin...
所有患者检查前均记录性别(男性记为1,女性记为2)、年龄、身高、体重、腰围,将患者随机分为A组200例和B组110例,由1位具有5年以上工作经验的放射科医师记录每位受检者的触发扫描前所需时间(10 s+监测时间)及剂量长度乘积。 1.4 统计...
Dimensions (H x W x D): 19.82 mm x 201 mm x 223.5 mm (0.78 in. x 7.91 in. x 8.80 in.) Maximum power consumption: 13 W Weight: 0.6 kg (1.32 lb) Environment parameters Operating temperature: 0°C to 45°C (32°F to 113°F) Operating relative humidity: 5% to 95%, nonconden...
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The 95% confidence interval for difference between virtual and physical dissection were − 3.3 mg to 3.1 mg for absolute weight and from − 4.2 to plus 4% of LV mass. Figure 2 Difference between CT-estimated (virtual dissection) and directly-measured LV mass (physical dissection)...
(32) proposed a strategy of tube voltage adjustment according to weight (80 kV for patients ≤80 kg and 100 kV for patients weighting >80 kg). Our results seem to support this strategy because image quality, readers' confidence, and CTDE diagnostic performance for detection of scar were ...
For pre-training, we used the SGD optimizer with a weight decay of 0.0001 and momentum of 0.9. The momentum update coefficient was 0.999. The mini-batch size was set to 256 in eight GPUs. The number of epochs was 200. The initial learning rate was 0.03, which was then multiplied by 0....