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Linewidths of Proton Nuclear Magnetic Resonance Peaks Obtained for Jaw Cysts and Abscesses at 400 MHz (In Engl.)
Abstract
We compare the nuclear magnetic resonance (NMR) linewidths of semi-heavy water (HOD) proton peaks in 29 nonhemorrhagic jaw cysts, 8 hemorrhagic cysts, and 19 abscesses. We also investigate the dependence of linewidths on fluid content and radio frequency (RF) application angles. The mixtures used for comparisons were prepared by adding 0.05 mL of each cyst or abscess to 0.95 mL of D2O. A series of mixtures containing varying amounts of the sample was also prepared. NMR measurements of all mixtures at 400 MHz were acquired using only a 90° RF pulse. The mean linewidths of the cystic groups were quite different (p = 0.004) from each other. However, there was a moderate difference between the mean linewidths of nonhemorrhagic cysts and abscesses (p = 0.048) and between those of hemorrhagic cysts and abscesses (p = 0.045). The linewidth increases linearly with increasing fluid content but decreases with increasing RF application angle. In conclusion, the data suggest that linewidth measurements can distinguish cysts from abscesses. The concentration dependence of the linewidth also suggests that the rapid chemical exchange of protons between free and bound HODs contributes to the broadening of the linewidth.
Supporting agencies: We thank Associate Professor Cezmi Kayan for his assistance at the NMR facility. We also thank Edanz (https://www.edanz.com/ac) for editing a draft of this manuscript.
About the Authors
U. N. Yilmaz
University of Dicle
Turkey
Turkey
Diyarbakir
B. D. Yilmaz
University of Dicle
Turkey
Turkey
Diyarbakir
M. Z. Köylü
University of Dicle
Turkey
Turkey
Diyarbakir
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Review
For citations:
Yilmaz U.N., Yilmaz B.D., Köylü M.Z. Linewidths of Proton Nuclear Magnetic Resonance Peaks Obtained for Jaw Cysts and Abscesses at 400 MHz (In Engl.). Zhurnal Prikladnoii Spektroskopii. 2022;89(1):69-74.
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