Single-Point Magnetic Resonance Imaging Study of Water Adsorption in Pellets of Zeolite 4A

Magnetic Resonance Imaging of Gases: A Single-Point Ramped Imaging withT1Enhancement (SPRITE) Study

“…For a 128-pixel image the relation of Eq. [19] is achieved for flip angles greater than 12°. If the sensitivity is dictated by the steady state term,…”

“…[19], image blurring is predicted even with short repetition times. On the other hand, for TR Ͼ T* 2 the small ⑀ factor in Eq.…”

“…This simple relation shows that when the condition [19] is met, the image resolution is affected by the longitudinal magnetization evolution during the scan (17),…”

“…The first test was performed by pumping the gas into a Plexiglas container, while monitoring the pressure. Figure 8 shows the pressure dependence of the 19 F T 1 and T* 2 relaxation times. With this knowledge, the repetition times of the SPRITE experiment can be optimized.…”

“…A series of recent reports indicates the scope of the technique. Applications to material sciences are reported through studies on cement and concrete (14,15), polymers (16,17), compact bone (18), and water adsorption in zeolites (19). This near-silent technique is able to generate images which may have quantitative T 1 , T 2 , T* 2 , T 1 , or spin density contrast (11,14,17).…”