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2014-11-25T15:52:35Z

Lapierre: /* some links to papers about phantom making */

== A.A. Martinos Center / Wald group anthropomorphic phantom builder's Wiki ==
[[File:giorgio_phant.jpg|200px|thumb|right|]]

This Wiki is a resource for people who are constructing antrhopomorphic MRI phantoms developed by [http://www.nmr.mgh.harvard.edu/martinos/people/showPerson.php?people_id=178 Larry Wald's group] at the [http://www.nmr.mgh.harvard.edu/martinos/flashHome.php Martinos Center for Biomedical Imaging], [http://www.massgeneral.org/ Massachusetts General Hospital].

The basic principle is that improved anthropomorphic phantoms lead to better and faster development of MRI methodology with less use of healthy subject volunteers. This is both cost effective and ethical. Therefore we distribute our designs and ask only that you reference the appropriate paper and the source of the design.

The designs are available in CAD and STL files and are intended to be 3D printed. Most of the components are open source designs.

== MGH Phantoms for download ==
* [https://phantoms.martinos.org/index.php/MGH_head_1:MGH_head_1 MGH_head_1]
* [https://phantoms.martinos.org/index.php/MGH_head_2:MGH_head_2 MGH_head_2]
* [https://phantoms.martinos.org/index.php/MGH_head_shoulders_1:MGH_head_shoulders_1 MGH_head_shoulders_1]
* [https://phantoms.martinos.org/index.php/MGH_fetal_1:MGH_fetal_1 MGH_fetal_1]

== tips for 3D printing for phantoms ==

coming soon...

== some links to papers about phantom making ==

[http://www.ncbi.nlm.nih.gov/pubmed/17659546 Design, Construction and Evaluation of an Anthropomorphic Head Phantom With Realistic Susceptibility Artifacts

[http://www.ncbi.nlm.nih.gov/pubmed/3821466 New Polyvinyl Alcohol Gel Material for MRI Phantoms

[http://www.ncbi.nlm.nih.gov/pubmed/16148391 Tissue-mimicking phantom materials for narrowband and ultrawideband microwave applications

[http://www.ncbi.nlm.nih.gov/pubmed/22396226 A Novel MRI-Compatible Brain Ventricle Phantom for Validation of Segmentation and Volumetry Methods

[http://www.ncbi.nlm.nih.gov/pubmed/21866208 Heterogeneous Anthropomorphic Phantoms With Realistic Dielectric Properties For Microwave Breast Imaging Experiments

[http://www.ncbi.nlm.nih.gov/pubmed/22225325 An anthropomorphic polyvinyl alcohol brain phantom based on Colin27 for use in multimodal imaging

MGH head 1:MGH head 1

2014-11-25T15:50:43Z

Lapierre:

== MGH head 1 ==
[[File:giorgio_phant.jpg|200px|thumb|right|]]
*This is a head phantom based on a 1mm isotropic resolution MR dataset which was anatomically segmented and used as a numerical model for electromagnetics calculations as described in:
Makris et al.

[http://www.ncbi.nlm.nih.gov/pubmed/18985401 MRI-based anatomical model of the human head for specific absorption rate mapping.

*We have taken this anatomically labeled head from a pixel model to a mesh model and created a phantom with 2 fluid compartments; 1) brain, and 2) other soft tissues (see figure below). The idea is that materials that are electrically similar are grouped together. Thus bone and air (both low epsilon, low conductivity) are done in plastic (also low e, low conductivity), and the tissue compartments can be filled with appropriate fluids. Also shown on the figure below is a CT scan of the phantom and an MRI of the filled phantom.

[https://phantoms.martinos.org/images/3/36/MGH_head_1.zip Click here for .skp and stl files] to download files for the anthropomorthic head phantom published in Graedel et al MRM 2014.

The sealing flange uses an o-ring.

'''3D printing tips'''

*Be sure to see our info on the first page concerning sealing phantoms created by addive technology 3D printers. Normally these are porous and do not hold water; they need a sealing step.

[[File:Phantom_figure_CT_MR.png|400px|thumb|right|]]

Martinos Center Anthropomorphic Phantoms - User contributions [en]

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MGH head 1:MGH head 1