Article Figures & Data
Figures
- Fig 1.
Artifact volumes (signal loss and pileup artifacts) of all sequences caused by the CCT-T (A) and the Z-T (B) samples (double asterisks indicate P ≤ .001; numbers next to the bars indicate the volume of pileup and signal loss artifacts separately in milliliters). n.s. indicates not significant.
- Fig 2.
3D rendering of artifacts and source images (blue, signal loss artifacts; red, pileup artifacts) of the CCT-T (A) samples and Z-T (B) samples for all evaluated sequences.
- Fig 3.
Comparison of all 4 STIR sequences in 2 volunteers with metallic dental materials. A, A patient with artifacts caused by a retainer (signal-loss artifact within dashed lines). B, A volunteer with artifacts caused by an amalgam filling. Note the decrease of artifact sizes in MSVAT-SPACE-STIR images compared with SPACE-STIR images in both examples. Minor differences can be noted between TSE-STIR and SEMAC-STIR images, as well.
- Fig 4.
nSNR values of all used sequences. Double asterisks indicate P ≤ .001). n.s. indicates not significant.
- Fig 5.
Mean visibility scores of in vitro images of the 8 anatomic structures in all STIR sequences. The asterisk indicates P ≤ .05; double asterisks, P ≤ .001.
- Fig 6.
Two patients examined with MSVAT-SPACE-STIR. A, A 25-year-old woman with dysesthesia in the right mandible and chin after wisdom tooth extraction in the right mandible (asterisk indicates the extraction site). Increased signal intensity of the neurovascular bundle (white solid arrow) compared with the healthy side (white dashed arrow) in curved multiplane reconstructions of MSVAT-SPACE-STIR, suggesting nerve damage. Note the small amount of artifacts around the implant-supported crown (hash tag) and incomplete bone marrow conversion resulting in bright signal in STIR images on both sides (double asterisks). B, An 8-year-old child after drainage of an abscess in the right mandible with residual soft-tissue inflammation in the right lateral gingiva (white arrows in reformatted axial [left]) and coronal [right]) images).
Tables
Parameters of all sequences
Sequence TR/TE (ms) Voxel Size (mm) FOV (mm) Matrix Readout Bandwidth (Hz/Px) Slices Slice-Encoding Steps or Oversampling (%) VAT Time (min:sec) SPACE-STIR 2500/131 0.55 × 0.55 × 0.55 140 × 124 256 501 72 55.6 No 14:02 MSVAT-SPACE-STIR 2500/199 0.55 × 0.55 × 0.55 140 × 84 256 528 72 55.6 Yes 06:04 TSE-STIR 5100/44 0.59 × 0.59 × 1.5 150 × 150 256 592 25 No No 03:36 SEMAC-STIR 5100/45 0.59 × 0.59 × 1.5 150 × 150 256 592 25 4 Yes 06:19 Note:—VAT indicates view angle tilting.
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