Magnetic Resonance Imaging: Difference between revisions
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A strong magnetic field (up to 1.5 to 4 Tesla) is generated in the machine through which the body is passed (the centre of the "donut ring" seen in the above image). The earth's natural magnetic field is about 0.5 Gauss compared to 15,000 Gauss (1.5 Tesla) in the MRI. | A strong magnetic field (up to 1.5 to 4 Tesla) is generated in the machine through which the body is passed (the centre of the "donut ring" seen in the above image). The earth's natural magnetic field is about 0.5 Gauss compared to 15,000 Gauss (1.5 Tesla) in the MRI. | ||
==Some Recent Findings== | ==Some Recent Findings== | ||
* ''' | * '''Developmental atlas of the early first trimester human embryo.'''<ref name="PMID20503356" />"To obtain data on early human development, we used magnetic resonance (MR) imaging and episcopic fluorescence capture (EFIC) to acquire digital images of human embryos spanning the time of dynamic tissue remodeling and organogenesis (Carnegie stages 13 to 23)." | ||
==Species MRI== | ==Species MRI== | ||
Revision as of 11:51, 16 August 2010
Introduction
Recently there have been several groups preparing developmental embryo atlases of several species, including human[1], based upon imaging of different age embryos. There have also been studies of adult anatomical structures and the placenta.
Magnetic Resonance Imaging (MRI) began in 1977 and uses magnetism, radio waves, and a computer to produce images either as individual slices or reconstructed to give three dimensional (3D) views of specific anatomical regions or structures.
MRI can be used in fetuses at 18 weeks gestational age or later and has been used mainly in brain and spinal diagnosis, and has also been used to investigate other abnormalities of pregnancy. (More? BrighamRAD Twin Gestation with Complete Hydatidiform Mole)
About MRI
A strong magnetic field (up to 1.5 to 4 Tesla) is generated in the machine through which the body is passed (the centre of the "donut ring" seen in the above image). The earth's natural magnetic field is about 0.5 Gauss compared to 15,000 Gauss (1.5 Tesla) in the MRI.
Some Recent Findings
- Developmental atlas of the early first trimester human embryo.[1]"To obtain data on early human development, we used magnetic resonance (MR) imaging and episcopic fluorescence capture (EFIC) to acquire digital images of human embryos spanning the time of dynamic tissue remodeling and organogenesis (Carnegie stages 13 to 23)."
Species MRI
Human
- Embryo[1]"To obtain data on early human development, we used magnetic resonance (MR) imaging and episcopic fluorescence capture (EFIC) to acquire digital images of human embryos spanning the time of dynamic tissue remodeling and organogenesis (Carnegie stages 13 to 23)."
- Brain[2] "Quantitative whole brain 3D validation of tissue labeling performed on a set of 14 fetal MR scans (20.57-22.86 weeks gestational age) demonstrates that this atlas-based EM segmentation approach achieves consistently high DSC performance for the main tissue types in the fetal brain."
Mouse
- Mouse Mutants[3]"Using individual 3D embryo MRI histology, we identified new pituitary phenotypes in Hesx1 mutant mice. Subsequently we use advanced computational techniques to produce a whole-body embryo atlas from 6 CD-1 embryos, creating an average image with a greatly enhanced anatomical detail, particularly in CNS structures."
Chicken
- Eye development PMID19540232 "We subsequently used the images obtained from the MRI data in order to make precise measurements of chick embryo eye surface area, volume and axial length from E4 to E10."
Xenopus
- Early embryo[4]"Here, we report on the use of microscopic magnetic resonance imaging (mMRI) to noninvasively observe mitotic cell division of early blastomeres in the optically opaque Xenopus laevis embryo."
Structure Images
Placenta
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| Magnetic resonance angiography (MRA) of human placenta viewed from the fetal side.[5] |
Adult Inner Ear
The 3D reconstructed technique was used to acquire coronal and axial images of the adult inner ear. The coronal section reconstruction was chosen since it increases visibility of the turns of the cochlea.[6]
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References
- ↑ 1.0 1.1 1.2 <pubmed>20503356</pubmed>
- ↑ <pubmed>20108226</pubmed>
- ↑ <pubmed>20656039</pubmed>
- ↑ <pubmed></pubmed>
- ↑ <pubmed>20226038</pubmed>| BMC Physiol.
- ↑ <pubmed>19575114</pubmed>| Braz J Otorhinolaryngol.
Reviews
Articles
Search PubMed
Search Pubmed: Embryo Magnetic Resonance Imaging | Magnetic Resonance Imaging |
External Links
- Brookhaven National Laboratory New MicroMRI Facility Expands Lab's Brain-Imaging Capabilities
Glossary Links
- Glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Numbers | Symbols | Term Link
Cite this page: Hill, M.A. (2024, May 18) Embryology Magnetic Resonance Imaging. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Magnetic_Resonance_Imaging
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
