NANOMA:Artifacts:Experiments
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Image artifact experiments for magnetic particles conducted at BWH on June 20, 2009
- Objective: To characterize the image artifacts created by magnetic particles. We have imaged the magnetic particles for different pulse sequences with variations in echo type, echo time, voxel size and flip angle. We have also used particles of varying diameter and material.
- Where : Brigham and Women's Hospital
- Scanner : GE Signa 3.0T
- When : June 20, 2009
- Participants : Jayender Jagadeesan (BWH), Tim Wortmann (University of Oldenburg)
Sequences used
- Gradient Echo (GRE)
- TE : Minimum Full
- TR : 22
- Flip Angle : 30
- Bandwidth : 15.63
- FOV : 16
- Slice thickness : 3
- Frequency : 256
- Phase : 160
- Spin Echo (SE)
- TE : Min Full
- TR : 500
- Bandwidth : 31.25
- FOV : 16
- Slice thickness : 3
- Frequency : 256
- Phase : 160
- Single Shot Fast Spin Echo (SSFSE)
- TE : 80
- TR : Min
- Bandwidth : 83.33
- FOV : 16
- Slice thickness : 3
- Frequency : 256
- Phase : 160
DICOM Images
- Agar Only
- GRE sequence: Parameters mentioned above
- GRE sequence: Flip angle = 10, all other parameters are the same
- GRE sequence: Frequency = 192, all other parameters are the same
- SE sequence: Parameters mentioned above
- SE sequence: TE = 30, all other parameters are the same
- SE sequence: Frequency = 192, all other parameters are the same
- SSFSE sequence: Parameters mentioned above
- SSFSE sequence: TE = 160, all other parameters are the same
- SSFSE sequence: Frequency = 128, all other parameters are the same
_
- Steel Cube 1x1x0.5mm
- GRE sequence: Parameters mentioned above
- GRE sequence: Flip angle = 10, all other parameters are the same
- GRE sequence: Frequency = 192, all other parameters are the same
- SE sequence: Parameters mentioned above
- SE sequence: TE = 30, all other parameters are the same
- SE sequence: Frequency = 192, all other parameters are the same
- SSFSE sequence: Parameters mentioned above
- SSFSE sequence: TE = 160, all other parameters are the same
- SSFSE sequence: Frequency = 128, all other parameters are the same
_
- Steel Cube 1x1x1mm
- Steel Cube 1x1x1mm GRE sequence: Parameters mentioned above
- Steel Cube 1x1x1mm GRE sequence: Flip angle = 10, all other parameters are the same
- Steel Cube 1x1x1mm GRE sequence: Frequency = 192, all other parameters are the same
- Steel Cube 1x1x1mm SE sequence: Parameters mentioned above
- Steel Cube 1x1x1mm SE sequence: TE = 30, all other parameters are the same
- Steel Cube 1x1x1mm SE sequence: Frequency = 192, all other parameters are the same
- Steel Cube 1x1x1mm SSFSE sequence: Parameters mentioned above
- Steel Cube 1x1x1mm SSFSE sequence: TE = 160, all other parameters are the same
- Steel Cube 1x1x1mm SSFSE sequence: Frequency = 128, all other parameters are the same
_
- Steel Cube 1x1x2mm
- GRE sequence: Parameters mentioned above
- GRE sequence: Flip angle = 10, all other parameters are the same
- GRE sequence: Frequency = 192, all other parameters are the same
- SE sequence: Parameters mentioned above
- SE sequence: TE = 30, all other parameters are the same
- SE sequence: Frequency = 192, all other parameters are the same
- SSFSE sequence: Parameters mentioned above
- SSFSE sequence: TE = 160, all other parameters are the same
- SSFSE sequence: Frequency = 128, all other parameters are the same
_
- Steel Sphere 1mm
- GRE sequence: Parameters mentioned above
- GRE sequence: Flip angle = 10, all other parameters are the same
- GRE sequence: Frequency = 192, all other parameters are the same
- SE sequence: Parameters mentioned above
- SE sequence: TE = 30, all other parameters are the same
- SE sequence: Frequency = 192, all other parameters are the same
- SSFSE sequence: Parameters mentioned above
- SSFSE sequence: TE = 160, all other parameters are the same
- SSFSE sequence: Frequency = 128, all other parameters are the same
_
- Steel Sphere 1.2mm
- GRE sequence: Parameters mentioned above
- GRE sequence: Flip angle = 10, all other parameters are the same
- GRE sequence: Frequency = 192, all other parameters are the same
- SE sequence: Parameters mentioned above
- SE sequence: TE = 30, all other parameters are the same
- SE sequence: Frequency = 192, all other parameters are the same
- SSFSE sequence: Parameters mentioned above
- SSFSE sequence: TE = 160, all other parameters are the same
- SSFSE sequence: Frequency = 128, all other parameters are the same
_
- Steel Sphere 1.5mm
- GRE sequence: Parameters mentioned above
- GRE sequence: Flip angle = 10, all other parameters are the same
- GRE sequence: Frequency = 192, all other parameters are the same
- SE sequence: Parameters mentioned above
- SE sequence: TE = 30, all other parameters are the same
- SE sequence: Frequency = 192, all other parameters are the same
- SSFSE sequence: Parameters mentioned above
- SSFSE sequence: TE = 160, all other parameters are the same
- SSFSE sequence: Frequency = 128, all other parameters are the same
_
- Nd-Fe-B magnet disc 2x1mm
- GRE sequence: Parameters mentioned above
- GRE sequence: Flip angle = 10, all other parameters are the same
- GRE sequence: Frequency = 192, all other parameters are the same
- SE sequence: Parameters mentioned above
- SE sequence: TE = 30, all other parameters are the same
- SE sequence: Frequency = 192, all other parameters are the same
- SSFSE sequence: Parameters mentioned above
- SSFSE sequence: TE = 160, all other parameters are the same
- SSFSE sequence: Frequency = 128, all other parameters are the same
_
- Steel Sphere 2mm
- GRE sequence: Parameters mentioned above
- GRE sequence: Flip angle = 10, all other parameters are the same
- GRE sequence: Frequency = 192, all other parameters are the same
- SE sequence: Parameters mentioned above
- SE sequence: TE = 30, all other parameters are the same
- SE sequence: Frequency = 192, all other parameters are the same
- SSFSE sequence: Parameters mentioned above
- SSFSE sequence: TE = 160, all other parameters are the same
- SSFSE sequence: Frequency = 128, all other parameters are the same
_
- Steel Sphere 2.5mm
- GRE sequence: Parameters mentioned above
- GRE sequence: Flip angle = 10, all other parameters are the same
- GRE sequence: Frequency = 192, all other parameters are the same
- SE sequence: Parameters mentioned above
- SE sequence: TE = 30, all other parameters are the same
- SE sequence: Frequency = 192, all other parameters are the same
- SSFSE sequence: Parameters mentioned above
- SSFSE sequence: TE = 160, all other parameters are the same
- SSFSE sequence: Frequency = 128, all other parameters are the same
_
- Steel Sphere 3mm
- GRE sequence: Parameters mentioned above
- GRE sequence: Flip angle = 10, all other parameters are the same
- GRE sequence: Frequency = 192, all other parameters are the same
- SE sequence: Parameters mentioned above
- SE sequence: TE = 30, all other parameters are the same
- SE sequence: Frequency = 192, all other parameters are the same
- SSFSE sequence: Parameters mentioned above
- SSFSE sequence: TE = 160, all other parameters are the same
- SSFSE sequence: Frequency = 128, all other parameters are the same
_
- Brass Sphere 6mm
_
- Ferrofluid
- GRE sequence: Parameters mentioned above
- GRE sequence: Flip angle = 10, all other parameters are the same
- GRE sequence: Frequency = 192, all other parameters are the same
- SE sequence: Parameters mentioned above
- SE sequence: TE = 30, all other parameters are the same
- SE sequence: Frequency = 192, all other parameters are the same
- SSFSE sequence: Parameters mentioned above
- SSFSE sequence: TE = 160, all other parameters are the same
- SSFSE sequence: Frequency = 128, all other parameters are the same
Photographs
- Slice view of agar
Steel cube 1x1x0.5mm
Steel cube 1x1x1mm
Steel cube 1x1x2mm
Steel sphere 1.0mm
Steel sphere 1.2mm
Steel sphere 1.5mm
Steel sphere 2.0mm
Steel sphere 2.5mm
Steel sphere 3.0mm
Brass sphere 6.0mm
NdFeB disc magnet 2x1mm
