Receive Bandwidth Variation Effect Toward the Signal and Contrast to Noise Ratio in Magnetic Resonance Imaging (MRI) Cervical Examination with the Sequence of T1 Weighted Turbo Spin Echo
Journal Title: Journal of Medical Science And clinical Research - Year 2017, Vol 5, Issue 7
Abstract
Introduction: The received bandwidth parameter is a parameter affecting the value of Signal to Noise Ratio (SNR) where the radiographer is usually stuck to the existing protocol: the bandwidth of 146 Hz /Px. In fact, by doing the variation of received bandwidth, the pictures of SNR variation will be obtained to define the best bandwidth to SNR and contrast to noise ratio (CNR). Objective: The purpose of this research is to find out the effect of received bandwidth variation on SNR and CNR and to determine the most optimal received bandwidth for SNR and CNR on cervical MRI with the sequence of T1 Weighted Turbo Spin Echo (TSE) in the sagittal slice. Methods: The type of this research is quantitative research with experimental approach done with MRI 1.5 Tesla at General Hospital Dr. Hasan Sadikin Bandung. The data were 35 cervical TRL images of TSE in the sagittal slice from 7 probands with 5 received bandwidth variations (106 Hz / Px, 126 Hz / Px, 146 Hz / Px, 166 Hz / Px and 186 Hz / Px). To obtain SNR and CNR values, an area of interest (ROI) measurement is performed on the corpus, discus, spinal cord and CSF regions to obtain the average signal and compared with the standard deviation value of the background. Data was analyzed with linear regression and descriptive mean rank test. Result: The result of the research shows the effect of received bandwidth on SNR and CNR on MRI cervical. There is a strong correlation between received bandwidth variation with cervical SNR with correlation coefficient = 0.639, and there is a moderate correlation between received bandwidth variation with CNR cervical with correlation coefficient = 0,532 with p - value < 0.05. The optimal received bandwidth value of the T1WI saturation T1WI T1WI MRI is 106 Hx / px with a mean rank of SNR = 160.5 and mean rank of CNR = 76.59. Conclusion: The received bandwidth variations on SNR and CNR in MRI significantly affect the cervical examination. The optimal received bandwidth value of T1WI TSE in the sagittal slice is 106 Hx / px.
Authors and Affiliations
Retno Wati
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