Technological applications on a 0.5T clinical MRI scanner

Anisimov, N.V.; Tarasova, A.A.; Usanov, I.A.; Pavlova, O.S.; Gulyaev, M.V.; Pirogov, Y.A.

Авторы: Anisimov N.V., Tarasova A.A., Usanov I.A., Pavlova O.S., Gulyaev M.V., Pirogov Yu A.
Сборник: Magnetic Resonance and its Applications. Spinus-2023. Proceedings. Saint Petersburg State University
Год издания: 2023
Место издания: ВВМ Санкт-Петербург
Первая страница: 51
Последняя страница: 54
Аннотация: Typical magnetic resonance (MR) scanners are focused on medical diagnostics - noninvasive imaging of human organs. MRI also has significant potential for technological applications – material diagnostics, MR microscopy, food analysis, etc. The purpose of this work was to test some of these applications. In particular, the visualization of objects that do not directly give an NMR signals, including metal objects. We did not find publications with corresponding illustrations. So we took measurements to make up for the lack of demo material. It was supposed to use multinuclear methods for this – detection of not only protons (1H), but also fluorine (19F) and sodium (23Na) nuclei. The measurements were carried out on a clinical MRI scanner with a field of 0.5 Tesla. This is a relatively low field, which makes it difficult to detect weak signals. In our case, this is relevant – the molar receptivity of the 23Na isotope is 10.8 times less than 1H, and the signal from fluorine is detected from the gase perfluorcyclobutane (PFCB, С4F8), whose density is 113.4 times less than for water. And the detection of proton signals from some of the solid objects we studied was difficult because of the short transverse relaxation times – T2=4 ms. But since in our case, there are no fundamental limitations on the scanning time, it was supposed to obtain acceptable results by repeatedly accumulating the signal.
Добавил в систему: Анисимов Николай Викторович

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Technological applications on a 0.5T clinical MRI scannerстатья

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