Table 1.
Comparison of microSPECT and microCT imaging parameters, advantages, and limitations.
| MicroSPECT | MicroCT | |
|---|---|---|
| Spatial resolution* | 350 × 350 × 350 μm3 | 88 × 88 × 88 μm3 |
| Voxel Volume | 42.9 nL | 0.68 nL |
| CNR | 5.09 ± 1.6 | 8.82 ± 1.9 |
| Acquisition time | 120 minutes ** | 5-10 minutes |
| Radiation Dose | 400-800 mGy | 360 mGy |
| Advantages |
|
|
| Disadvantages |
|
|
true spatial resolution, microSPECT images were reconstructed with a voxel resolution of 125 microns for analysis
further experimentation needed to determine minimum combination of scan time/radiotracer injected activity required for cardiac functional analysis in Vitrea®
for MicroCT with blood pool contrast agent. Note, however, that imaging myocardial infarction is possible via delayed hyper-enhancement [28].
CNR = contrast-to-noise ratio