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Magnetic Resonance Essay

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Magnetic resonance (MR) imaging is the most sensitive and specific imaging modality in the diagnosis of parenchymal iron overload in thalassemic patients on regular blood transfusion. The effect caused by the iron overload leads to signal loss in the affected tissues, particularly with the T2* weighted sequences, which give us noninvasive way to diagnose iron overload without biopsies. [16].
The accumulation of iron ions in the tissues, because of the superparamagnetic properties of the iron, causes local distortion in the magnetic fields and relaxation of the spins which results in shortening of the longitudinal relaxation time (T1) and the transverse relaxation time (T2), and particularly the transverse relaxation time as affected by …show more content…

Our study also detected lower signal intensity of the liver and pancreas in thalassemic patients with abnormal glucose tolerance in correlation with patients with normal glucose tolerance(table 2), in agreement with Matter et al., 2010 and Doaa Mohammad Youssef et al. and in agreement with Papakonstantinou et al. [36, 37, 23].
We observed positive correlation between both pancreatic and hepatic siderosis and age at diagnosis, but, no correlation was revealed with age of patients. in other hand, Au et al. [24] reported increase in pancreatic T2* values with age. Christoforidis study showed a significant negative correlation between MRI values in liver and age[26]. We observed also Negative significant correlation between serum ferritin and SIR of the pancreas, similar to Midiri et al. [22] but not agreement with others [27,23]. Argyropoulou et al [27] explained the lack of correlation between pancreatic siderosis and serum ferritin by the fact that T2 relaxation time depends on both siderosis and fatty infiltration of the pancreas reported in their adult group of patients.
In addition, negative correlation between serum ferritin and SIR of the liver in our studied patients was detected in agreement with multiple studies [27,23,28,29,30]; while no similar correlation was noted in other studies [26,31].
Pancreas cells damage and liver damage were the most important factors responsible for endocrine complications [32].
We detect a

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