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MR Angiographic Evaluation of Platinum Coil Packs at 1.5T and 3T: An In Vitro Assessment of Artifact Production: Technical Note

Matthew T. Walker, Jerome Tsai, Todd Parish, Brian Tzung, Ali Shaibani, Elizabeth Krupinski and Eric J. Russell
American Journal of Neuroradiology April 2005, 26 (4) 848-853;

Article Figures & Data

Tables

  • TABLE 1:

    Scanning parameters for the 3D TOF (1–7) and True FISP (8) sequences

    Constant 3D TOF Parameters1.5T3.0T
    TR, 24; FOV, 172 × 230; % phase FOV, 75; FA, 25; ST, 1TR, 27 (except for sequence 1 which had a TR of 45); FOV, 172 × 230; % phase FOV, 75; FA, 25; ST, 1
    Sequence 1TE, 7.20; BW, 105; acq mtx, 384 × 187; % samp, 65TE, 7.15; BW, 105; acq mtx, 384 × 216; % samp, 75
    Sequence 2TE, 7.20; BW, 105; acq mtx, 384 × 288; % samp, 100TE, 7.15; BW, 105; acq mtx, 384 × 288; % samp, 100
    Sequence 3TE, 3.52; BW, 105; acq mtx, 384 × 187; % samp, 65TE, 3.52; BW, 105; acq mtx, 384 × 216; % samp, 75
    Sequence 4TE, 2.75; BW, 250; acq mtx, 384 × 187; % samp, 65TE, 2.74; BW, 250; acq mtx, 384 × 216; % samp, 75
    Sequence 5TE, 2.72; BW, 450; acq mtx, 384 × 187; % samp, 65TE, 2.72; BW, 450; acq mtx, 384 × 216; % samp, 75
    Sequence 6TE, 2.72; BW, 450; acq mtx, 384 × 288; % samp, 100TE, 2.72; BW, 450; acq mtx, 384 × 288; % samp, 100
    Sequence 7TE, 2.51; BW, 450; acq mtx, 384 × 288; % samp, 100TE, 2.51; BW, 450; acq mtx, 384 × 288; % samp, 100
    No flow compensationNo flow compensation
    Sequence 8 CE MRATR, 3.17; TE, 1.24; BW, 490; acq mtx, 512 × 182; FOV, 172 × 230; % phase FOV, 62.5; FA, 5; % samp, 56.9; ST, 0.9; ETL, 1; PED, RowTR, 3.77; TE, 1.49; BW, 490; acq mtx, 512 × 246; FOV, 172 × 230; % phase FOV, 68.8; FA, 5; % samp, 69.9; ST, 0.9; ETL, 1; PED, Row

    • Note.—TR, repetition time; TE, echo time, BW, bandwidth; FOV, field of view; acq mtx, acquisition matrix; FA, flip angle; samp, sampling; ST, section thickness; ETL, echo train length; PED, phase encoding direction.

  • TABLE 2:

    Signal loss volumes (mm3) due to coil-induced susceptibility artifact

    1.5T3T
    Model 1, 44.9% OcclusionModel 2, 22.4% OcclusionModel 1, 44.9% OcclusionModel 2, 22.4% Occlusion
    Sequence 12234138530671827
    Sequence 21955107329721963
    Sequence 3137287220551221
    Sequence 411607451713964
    Sequence 511126881719959
    Sequence 69426571491933
    Sequence 78756221522819
    Sequence 8984688985701
    Actual Volume of Coil Masses (mm3)
    Model 1: 44.9% occlusionModel 2: 22.4% occlusion
    471471
  • TABLE 3:

    Greatest diameter (mm) in 3 orthogonal planes of signal loss due to coil-induced susceptibility artifact

    1.5T (AP/CC/LR)3T (AP/CC/LR)
    Model 1, 44.9% OcclusionModel 2, 22.4% OcclusionModel 1, 44.9% OcclusionModel 2, 22.4% Occlusion
    Sequence 117.2/19.4/13.212.0/16.0/12.018.9/22.5/17.112.4/20.8/14.4
    Sequence 216.5/19.4/13.211.0/16.2/10.917.8/23.0/16.214.1/20.7/14.3
    Sequence 314.1/17.1/11.19.2/13.4/9.616.8/20.0/13.410.2/18.9/12.5
    Sequence 411.5/16.5/10.19.5/13.9/9.714.8/18.4/12.310.0/17.4/11.8
    Sequence 511.6/15.6/11.19.3/14.3/9.313.4/18.3/10.89.9/17.0/11.4
    Sequence 611.7/15.7/10.89.5/14.1/8.913.7/18.8/11.810.5/16.5/11.4
    Sequence 711.0/15.4/10.69.2/14.0/9.613.7/18.8/10.69.8/16.0/10.6
    Sequence 811.7/14.2/10.19.6/12.6/10.512.9/13.9/10.09.4/12.7/10.1
    Actual Diameters of Coil-Filled Aneurysm Models (mm) (AP/CC/LR)
    Model 1: 44.9% occlusionModel 2: 22.4% occlusion
    10/10/99/10/10

    • Note.—AP, anterior-posterior; CC, cranial-caudal; LR, left-right.

  • TABLE 4:

    Volume overestimation factor for given coil pack density and sequence

    1.5T3.0T
    Model 1, 44.9% OcclusionModel 2, 22.4% OcclusionModel 1, 44.9% OcclusionModel 2, 22.4% Occlusion
    Sequence 14.742.946.513.88
    Sequence 24.152.286.314.17
    Sequence 32.911.854.362.59
    Sequence 42.461.583.642.05
    Sequence 52.361.463.652.04
    Sequence 62.001.393.171.98
    Sequence 71.861.323.231.74
    Sequence 82.091.462.091.49
  • TABLE 5:

    Average diameter overestimation factor for each coil pack density

    1.5T3.0T
    Model 1, 44.9% OcclusionModel 2, 22.4% OcclusionModel 1, 44.9%OcclusionModel 2, 22.4% Occlusion
    Sequence 11.711.382.011.63
    Sequence 21.691.311.961.69
    Sequence 31.451.111.721.42
    Sequence 41.311.141.561.34
    Sequence 51.321.131.471.31
    Sequence 61.311.121.521.32
    Sequence 71.271.131.481.25
    Sequence 81.241.131.261.11
  • TABLE 6:

    Average millimeters of actual overestimation in any one direction

    1.5T3.0T
    Model 1, 44.9% OcclusionModel 2, 22.4% OcclusionModel 1, 44.9% OcclusionModel 2, 22.4% Occlusion
    Sequence 16.93.79.86.1
    Sequence 26.73.09.36.7
    Sequence 34.41.17.04.1
    Sequence 43.01.45.43.3
    Sequence 53.11.34.63.0
    Sequence 63.01.25.03.1
    Sequence 72.61.34.62.4
    Sequence 82.31.32.51.1
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MR Angiographic Evaluation of Platinum Coil Packs at 1.5T and 3T: An In Vitro Assessment of Artifact Production: Technical Note
Matthew T. Walker, Jerome Tsai, Todd Parish, Brian Tzung, Ali Shaibani, Elizabeth Krupinski, Eric J. Russell
American Journal of Neuroradiology Apr 2005, 26 (4) 848-853;
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