A quantitative experimental phantom study on MRI image uniformity
نویسندگان
چکیده
منابع مشابه
Quantitative SPECT and planar 32P bremsstrahlung imaging for dosimetry purpose –An experimental phantom study
Background: In this study, Quantitative 32P bremsstrahlung planar and SPECT imaging and consequent dose assessment were carried out as a comprehensive phantom study to define an appropriate method for accurate Dosimetry in clinical practice. Materials and Methods: CT, planar and SPECT bremsstrahlung images of Jaszczak phantom containing a known activity of 32P were acquired. In addition, Phanto...
متن کاملQuantitative dynamic 19F MRI oximetry in a phantom simulating hypoxia
Introduction Tumor hypoxia is well known to reduce cancer treatment efficacy [1]. Hypoxic tumor cells, which have decreased oxygen levels (pO2), are more resistant to radiotherapy and chemotherapy. Dissolved oxygen influences the F magnetic resonance relaxation times of perfluorocarbons [2]. This property has been used in semiquantitative animal studies to image tumor oxygenation [3]. In this s...
متن کاملQuantitative experimental validation of an analytic model for intensity non-uniformity in MRI
Introduction We constructed two plastic cylindrical containers with elliptic and circular cross sections respectively to validate our model of intensity non-uniformity. Each cylinder was filled with water and various concentrations of NaCl, to produce solutions with conductivity similar to that of biological tissues at 64MHz [l]. For our experiments, the cylinders were aligned axially with the ...
متن کاملOn a Quantitative Notion of Uniformity
One topic arising in recent research on \Bounded Query Classes" is to consider quantitative aspects of recursion theory, and in particular various notions of parameterized recursive approximations of sets. An important question is, for which values of the parameters { depending on the type of approximation { the approximated set is necessarily recursive. Beigel's Nonspeedup Theorem, Kummer's Ca...
متن کاملA water-soluble and water-coordinated Mn(II) complex: synthesis, characterization and phantom MRI image study.
Ligand H4bedik was reacted with MnCl2·4H2O at pH ∼ 6.5 to give a highly water-soluble and water-coordinated Mn(ii) complex (). The complex was found to show r1 = 3.11 mM(-1) s(-1) per Mn(ii) at 1.4 T and 6.26 mM(-1) s(-1) per Mn(ii) at 14.1 T at 25 °C, pH = 7.4. In addition to r1, the r2 at 14.1 T was found to be 132.78 mM(-1) s(-1) per Mn(ii) at 25 °C, pH = 7.4.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Dentomaxillofacial Radiology
سال: 2018
ISSN: 0250-832X,1476-542X
DOI: 10.1259/dmfr.20180077