User:Daniel Mietchen/Talks/DigitalSpecimen 2014/Magnetic Resonance Imaging and natural history collections

Optimizing preparation and MRI scanning of museum specimens

Abstract

Magnetic Resonance Imaging (MRI) is a digital imaging technique widely used across the life sciences, yet rarely so in the context of natural history collections. This talk will zoom in on this latter subject.

Along with a basic introduction into the methodology underlying MR imaging and MR spectroscopy, an overview will be given about applications to specimens preserved in various ways - e.g. in alcohol or cryobanks or through mummification or fossilization - as well as to living or fresh specimens in the context of comparative investigations with specimens from collections. This will be complemented with examples from MR-based morphometry.

Besides specimen structure, MRI allows to image aspects of specimen dynamics - like ontogenesis, diffusion, hydration or flow - and of chemical composition. This versatility is achieved through a plethora of very specific technical protocols, which poses challenges for data aggregation, preservation and reuse, while providing collections with new avenues for research and for science communication.

Clickstream

• banana flower image

http://ubersuper.com/uploads/2014/04/6nOONHE1.gif

more via

http://insideinsides.blogspot.de/2013/10/banana-flower.html

• Human brain

https://commons.wikimedia.org/wiki/File:Structural_MRI_animation.ogv

Brains of multiple primate species

http://precedings.nature.com/documents/4511/version/2/files/npre20104511-2.pdf

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2729663/figure/F3/ gyrification

Diffusion tensor imaging

https://commons.wikimedia.org/wiki/File:White_Matter_Connections_Obtained_with_MRI_Tractography.png

• Cell division

http://vimeo.com/album/134429/video/4963816

http://www.cell.com/biophysj/pdf/S0006-3495(06)72366-9.pdf localized spectroscopy Fig. 1 on p. 3

• Real-time MRI

https://commons.wikimedia.org/wiki/File:Real-time_MRI_-_Speaking_%28Chinese%29.ogv speaking

• Insect MRI

http://www.insectscience.org/3.5/Hart_et.al._JIS_3_5_2003.pdf

• Fish collection

http://www.digitalfishlibrary.org/

http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0034499

• Echinoid MRI

http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0037520

http://www.biomedcentral.com/1741-7007/6/33 - data about to be made public

• Overview of dehydrated specimens

Figure 4.9

• Belemnites

http://vimeo.com/album/134427/video/5027286

http://vimeo.com/album/134427/video/5026838

• 1H/13C spectra of belemnite

Fig. 6 and Figure 4.10

• Mummy MRI

http://www.ajronline.org/doi/pdf/10.2214/AJR.07.2087

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2829391/figure/fig04/

• Epiblema & temperature

http://vimeo.com/album/134431/video/4964033

http://vimeo.com/album/134431/video/4964427

• 23Na MRI

http://cds.ismrm.org/ismrm-2007/files/01344.pdf

• Multiple comparison issues demonstrated with fMRI on a dead salmon

http://blogs.scientificamerican.com/scicurious-brain/2012/09/25/ignobel-prize-in-neuroscience-the-dead-salmon-study/

About

This is a DigitalSpecimen 2014 talk on Magnetic Resonance Imaging.

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