Effects of variation of MRI parameters on signal homogeneity: A Qualitative analysis for Ferrous Benzoic Xylenon Orange gel

This study focuses on the diverse effects of MRI parameters on image quality using widely available imaging pulse sequences. A tissue equivalent gel system has been used for Magnetic Resonance Imaging by using Xylenol orange dye with Fricke-Benzoic solution which was formulated by Kelly R.G (1998)....

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Bibliographic Details
Published inJournal of the Pakistan Medical Association Vol. 60; no. 6; pp. 470 - 473
Main Authors NAZIR, Aalia, AFZAL, Muhammad, SAEED AHMAD BUZDAR
Format Journal Article
LanguageEnglish
Published Karachi Pakistan Medical Association 01.06.2010
Subjects
Biological and medical sciences
Ferrous Compounds - chemistry
Fluorescent Dyes
Gels - radiation effects
General aspects
Humans
Image Enhancement - methods
Image Processing, Computer-Assisted - methods
Magnetic Resonance Imaging - methods
Medical sciences
Phantoms, Imaging
Phenols
Qualitative Research
Radiometry - methods
Reproducibility of Results
Signal Processing, Computer-Assisted
Sulfoxides
Xylenes
Medical imagery
Tropical medicine
Qualitative analysis
Nuclear magnetic resonance imaging
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Summary:This study focuses on the diverse effects of MRI parameters on image quality using widely available imaging pulse sequences. A tissue equivalent gel system has been used for Magnetic Resonance Imaging by using Xylenol orange dye with Fricke-Benzoic solution which was formulated by Kelly R.G (1998). The gel system was radiated while using 6MV photons from Varian Clinic Linear Accelerator. The qualitative analysis include the effect of TR and TE on signal nonuniformity according to which the escalating repetition time gives a uniform signal having the average values calculated are 0.76%, 0.83%, 1.43% and 1.89% for the conventional spin echo (CSE), fast spin echo (FSE), gradient recalled echo (GRE) and fluid attenuated inversion recovery (FLAIR) respectively. FLAIR showed contradictory results due to longitudinal relaxation of the signal. This is because, at the longer value of inversion time (TI), the signal from simple fluids is nulled, thus reducing signal intensity. The evaluation of signal uniformity for different pulse sequences demonstrates that the repetition time (TR) affects the signal homogeneity as it maintains image quality for CSE and FSE. However, a careful selection is required for FLAIR due to its sensitive behaviour for image uniformity.
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ISSN:0030-9982