File:MRI Human Embryo - upper limb 01.jpg: Difference between revisions

MRI Human Embryo - Upper Limb

Human embryo week 6 (GA 8 week).

a Sagittal T2w image of the humerus of an 8-week GA specimen demonstrates initial ossification within the central part of the diaphysis (arrow). Chondrified ribs (short arrow). b Coronal T2w image of the forearm of the same specimen as in a) demonstrates small ossification centers in the central parts of the radius and ulna (arrow). The carpal (dotted white arrow) and metacarpal bones (dotted black arrow) are already visible as precartilage states. c Coronal T2w image of a 9-week GA specimen shows increased size of the ossification centers in humerus (white arrowhead) and radius (black arrow). The carpal and metacarpal bones demonstrate progressive chondrification and appear hypointense compared to the 8-week GA specimen

Ex vivo magnetic resonance microscopy (MRM) at 7.1 T (Clin Scan, Bruker Biospin, Germany) was performed in 10 human specimens at 8 to 12 weeks of gestational age (GA). In-plane resolution was 20 μm with a slice thickness of 70 μm.

Reference

<pubmed>27316469</pubmed>

BMC Dev Biol.

Copyright

© The Author(s). 2016

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