Use of Magnetic Resonance Imaging (MRI) and Low Resolution NMR Relaxometry to Follow Physicochemical Changes in Foods, Detect Quality and Asses Stability of Colloidal Systems

Magnetic Resonance Imaging (MRI) is a technique that is mostly used to visualize internal structure and most commonly used in medicine. With the advancement on low frequency, low resolution and low cost benchtop systems there has been a substantial increase on the use of these systems. With MRI it is possible to analyze without disturbing the sample. Image acquisition in MRI is based on excitation of protons in a sample through a radiofrequency pulse and acquiring and encoding the signal in different planes. NMR relaxometry is based on measurement of T1, T2 relaxation times either separately or at the same time through the use of 2D sequences. Self-Diffusion coefficients due to Brownian motion could also be measured through stimulated spin echo or pulse gradient spin echo sequences. In this study, findings of a couple studies that used NMR Relaxometry and Magnetic Resonance Imaging will be discussed shortly. Significant findings on the use of NMR for the design of capsaicin based nanoemulsions; oil migration in chocolate confectionery products, polymer water interactions in hydrogels, stability of liposome systems and investigation of surfactant behavior of macromolecules will be explored.


Experimental and mathematical investigation of mass transfer in food andhydrogel systems using magnetic resonance imaging and NMR relaxometry
Çıkrıkcı, Sevil; Öztop, Halil Mecit; Department of Food Engineering (2019)
Nuclear magnetic resonance (NMR) and Magnetic Resonance Imaging (MRI) are well-known non-invasive characterization methods used in a wide range of areas; from medical to food applications. NMR experiments are conducted either through spectroscopy with high resolution systems or with relaxometery (Time Domain NMR) through mid or low field systems. Time domain NMR is primarily based on relaxation times and diffusion measurements from the signal coming from the whole sample while MRI enables to visualize the i...
Measurement of AC magnetic field distribution using magnetic resonance imaging
Ider, YZ; Muftuler, LT (1997-10-01)
Electric currents are applied to body in numerous applications in medicine such as electrical impedance tomography, cardiac defibrillation, electrocautery, and physiotherapy. If the magnetic field within a region is measured, the currents generating these fields can be calculated using the curl operator. In this study, magnetic fields generated within a phantom by currents passing through an external wire is measured using a magnetic resonance imaging (MRI) system, A pulse sequence that is originally design...
Enhancing induced current magnetic resonance electrical impedance tomography ICMREIT image reconstruction
Induced Current Magnetic Resonance Electrical Impedance Tomography (ICMREIT) is an emerging imaging methodology that utilizes Magnetic Resonance Imaging (MRI) techniques to visualize the electrical conductivity as a new contrast. In ICMREIT, by fast switching of gradient fields of Magnetic Resonance (MR) system eddy currents are induced in the imaging volume. The secondary magnetic field generated by the induced eddy currents can be extracted from the MR phase images. Image reconstruction algorithms then us...
Analysis of magnetic resonance imaging in inhomogenous main magnetic field
Arpınar, Volkan Emre; Eyüboğlu, Behçet Murat; Department of Electrical and Electronics Engineering (2009)
In this study, analysis of Magnetic Resonance Imaging (MRI) in inhomogeneous main magnetic field is conducted. A numerical model based on Bloch equation is implemented for MRI, to understand effect of inhomogeneous magnetic field to Magnetic Resonance (MR) signal. Using the model, relations between inhomogeneity levels in main magnetic field with energy, decay time, bandwidth of the FID signal is investigated. Also relation between the magnetic field inhomogeneity and field of view is determined. To simulat...
Visualisation of cakes differing in oil content with magnetic resonance imaging
Kırtıl, Emrah; Aydogdu, AYÇA; Bulut, Elif Yildiz; Tatar, Betul Cilek; Öztop, Halil Mecit (Informa UK Limited, 2017-01-01)
Magnetic resonance imaging (MRI) is a non-invasive imaging technique that can visualise samples' interior by using the signal coming from mobile protons. The aim of this study was to examine the effects of oil content and peanut/raisin addition on cake quality and to illustrate the power of MRI in analysis of moisture and oil distribution. For this purpose, MR images were acquired with a spin echo sequence and relaxation times T-1 and T-2, and moisture content and firmness of cakes were measured. High oil c...
Citation Formats
H. M. Öztop, S. Çıkrıkcı, S. Güner, and B. Özel, “Use of Magnetic Resonance Imaging (MRI) and Low Resolution NMR Relaxometry to Follow Physicochemical Changes in Foods, Detect Quality and Asses Stability of Colloidal Systems,” presented at the 6th International Conference on Nutrition and Food Sciences (2017), Budapeşte, Macaristan, 2017, Accessed: 00, 2021. [Online]. Available: