In the first, 34 healthy subjects underwent two Carbon 11-labeled Pittsburgh compound B Positron emission tomography (11C-PiB PET) scans; in the second, 32 healthy subjects underwent two structural MRI scans; and in the last, 10 Alzheimer's disease (AD) subjects and 10Healthy Control (HC) subjects underwent 11C-PiB PET scans.
Articles that were scanned in the first query will not be scanned in the second regardless of relevance to the question, so selection of articles in previous queries is not likely to result in bias.
Thus, we decided to use only MnCl2 for the subsequent in vivo MRI scans in the second group of animals.
The highest OR was seen for children scanned in the second and at least one more trimester (adjusted OR 1.27, 95% CI: 0.85 1.90).
An ultrasound scan in the second trimester (18 to 23 weeks) is an effective method to detect structural anomalies [ 29- 31].
All fetuses received a routine anomaly ultrasound scan in the second trimester, and echocardiography (Voluson E8, GE Healthcare, Milwaukee, Wisconsin USA) was performed when fetuses were found to exhibit a heart abnormality.
The tilt and low variation artifacts associated with B f-scans now appear in perpendicular scans in the second dataset, and the same is true of high frequency variations associated with B s-scans. Figure 4 shows an example of a pair of OCT images and their mode of acquisition.
Thus, in datasets with small or no tilts induced by the incorrect positioning of the camera, the B f-scans from one dataset can be used to "correct" the B s-scans in the second dataset, creating a dataset where the retinal surfaces now reflect a better approximation of the shape of the eye.
To change the Scan Order, click on Scan Order in the second row.
Dr. Estroff said many women had ultrasound scans in the first trimester of a pregnancy, at 6 or 7 weeks, though some may not have them until 18 weeks.
