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MRI-Based Quantification of Magnetic Susceptibility in Gel Phantoms: Assessment of Measurement and Calculation Accuracy
المؤلفون المشاركون
Olsson, Emma
Wirestam, Ronnie
Lind, Emelie
المصدر
Radiology Research and Practice
العدد
المجلد 2018، العدد 2018 (31 ديسمبر/كانون الأول 2018)، ص ص. 1-13، 13ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2018-07-30
دولة النشر
مصر
عدد الصفحات
13
التخصصات الرئيسية
الملخص EN
The local magnetic field inside and around an object in a magnetic resonance imaging unit depends on the magnetic susceptibility of the object being magnetized, in combination with its geometry/orientation.
Magnetic susceptibility can thus be exploited as a source of tissue contrast, and susceptibility imaging may also become a useful tool in contrast agent quantification and for assessment of venous oxygen saturation levels.
In this study, the accuracy of an established procedure for quantitative susceptibility mapping (QSM) was investigated.
Three gel phantoms were constructed with cylinders of varying susceptibility and geometry.
Experimental results were compared with simulated and analytically calculated data.
An expected linear relationship between estimated susceptibility and concentration of contrast agent was observed.
Less accurate QSM-based susceptibility values were observed for cylindrical objects at angles, relative to the main magnetic field, that were close to or larger than the magic angle.
Results generally improved for large objects/high spatial resolution and large volume coverage.
For simulated phase maps, accurate susceptibility quantification by QSM was achieved also for more challenging geometries.
The investigated QSM algorithm was generally robust to changes in measurement and calculation parameters, but experimental phase data of sufficient quality may be difficult to obtain in certain geometries.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Olsson, Emma& Wirestam, Ronnie& Lind, Emelie. 2018. MRI-Based Quantification of Magnetic Susceptibility in Gel Phantoms: Assessment of Measurement and Calculation Accuracy. Radiology Research and Practice،Vol. 2018, no. 2018, pp.1-13.
https://search.emarefa.net/detail/BIM-1212767
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Olsson, Emma…[et al.]. MRI-Based Quantification of Magnetic Susceptibility in Gel Phantoms: Assessment of Measurement and Calculation Accuracy. Radiology Research and Practice No. 2018 (2018), pp.1-13.
https://search.emarefa.net/detail/BIM-1212767
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Olsson, Emma& Wirestam, Ronnie& Lind, Emelie. MRI-Based Quantification of Magnetic Susceptibility in Gel Phantoms: Assessment of Measurement and Calculation Accuracy. Radiology Research and Practice. 2018. Vol. 2018, no. 2018, pp.1-13.
https://search.emarefa.net/detail/BIM-1212767
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1212767
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