Planar imaging

Planar images obtained with laser-based imaging techniques in a propane-fueled research engine showing how closely coupled hydroxyl radical (OH) concentration is with temperature. (From Orth, A., Sick, V., Wolfrum, J., Maly, R.R., and Zahn, M., Proc. Combust. Inst., 25,143,1994. With permission.)... 

Vapor-phase fuel-distribution image converted to an equivalence-ratio field downstream of the maximum liquid-phase fuel penetration. Quantitative planar images are obtained in the optical engine using PLRS. (From Espey, C., Dec, J.E., Litzinger, T.A., and Santavicca, D.A., Combust. Flame, 109,65,1997.)... 

Fig. 1.21 Echo Planar Imaging (EPI) pulse sequence. Gradient-echo based multiple echoes are used for fast single-shot 2D imaging. Slice selection along Gs and frequency encoding along C, are utilized. Phase encoding is realized using short blipped gradient pulses along Gp.

Three general ultra-fast sampling strategies are used Echo planar imaging... 

Planar images can be analyzed on the anterior or posterior view. Beeause the limg has a thickness, the radiolabel may occur anywhere along the thiekness. The effeet due to deposition at varying thickness can be minimized by taking the geometrie mean of the anterior and the posterior images. 

Figure 6.10 Planar images of the air and fuel mixing pattern and reaction zone imaged by OH fluorescence of the ethylene flame at single-fuel injection low (a) and high (6) soot conditions...

B.J. Dardzinski, C.H. Sotak, Rapid tissue oxygen tension mapping using F inversion-recovery echo-planar imaging of Perfluoro-15-crown-5-ether, Magn. Reson. Med. 32 (1994) 88-97. 

Three sampling strategies are now introduced echo planar imaging (EPI), rapid acquisition with relaxation enhancement (RARE), and low excitation angle imaging. The first two are based on the sampling of more than one line of k-space for each r.f. excitation, and the third uses rapid multiple r.f. excitations. 

Stehling, M.K., R. Turner, and P. Mansfield "Echo-Planar Imaging in a Fraction of a Second, Science, 43 (October 4, 1991). 

---