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Twelve representative volumes arranged by gestational age
Twelve representative volumes arranged by gestational age. The first and fourth columns are strict sagittal sections obtained with volume contrast imaging, with sections 1- to 2-mm thick. The second and fifth columns are strict right lateral views of the dissected ventricular system, and the third and sixth columns are anteroinferior views (45 degrees from the longitudinal axis of the metencephalon). The white bars used for length reference on the left edges of the images in the first and fourth columns are 10-mm long. The reference dots on the left of each 3D rendering are 5-mm apart. The ages of the embryos are 7 weeks 4 days (crown-rump length [CRL], 13.6 mm) and 7 weeks 6 days (CRL, 14.6 mm) in the first row; 8 weeks 1 day (CRL, 16.5 mm) and 8 weeks 3 days (CRL, 19.1mm) in the second row; 8 weeks 6 days (CRL, 22.5 mm) and 9 weeks 2 days (CRL, 25.3 mm) in the third row; 9 weeks 4 days (CRL, 28.1 mm) and 9 weeks 6 days (CRL, 30 mm) in the fourth row; 10 weeks 6 days (CRL, 39.1 mm) and 11 weeks 1 day (CRL, 42.2 mm) in the fifth row; and 11 weeks 5 days (CRL, 49.2 mm) and 12 weeks (CRL, 53.3 mm) in the sixth row. (Reproduced with permission from Kim MS, Jeanty P, Turner C, et al. Three-dimensional sonographic evaluations of embryonic brain development. J Ultrasound Med. 2008;27: ) Source: OBSTETRICAL APPLICATIONS FOR 3D ULTRASONOGRAPHY, Sonography in Obstetrics and Gynecology: Principles & Practice, 7e Citation: Fleischer AC, Toy EC, Lee W, Manning FA, Romero RJ. Sonography in Obstetrics and Gynecology: Principles & Practice, 7e; 2014 Available at: Accessed: December 31, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved
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