Optimalization Image Of Turbo Spin Echo (TSE) With Pre Saturation And Gradient Moment Nulling (GMN) To Reduce Flow Artifact On MRI Cervical

2019 ◽  
Vol 21 (2) ◽  
pp. 57
Author(s):  
Kiki Rohmatul Ula
Keyword(s):  
Spinal Cord ◽  
Signal To Noise Ratio ◽  
Spin Echo ◽  
Region Of Interest ◽  
Spinal Cord Tissue ◽  
Turbo Spin Echo ◽  
Turbo Spin ◽  
Flow Compensation ◽  
Flow Artifact ◽  
Noise Ratio

ABSTRACTThe  research  of  Optimization  Image  of  Turbo  Spin  Echo  (TSE)  with  Pre saturation and Gradient Moment Nulling (GMN) to reduce flow artifact on MRI Cervical has been done. The purpose of this research is to know the effect of pre saturation and gradient moment nulling (GMN) on cervical MRI and determine optimal image to reduce flow artifact. This research used four treatment variations that were without pre saturation and without flow compensation (GMN), with pre saturation, with flow compensation (GMN), and with both pre saturation and flow compensation (GMN) on sequence T2-weighting TSE sagital on cervical MRI. The quantitative analysis done by using Region of Interest (ROI) on MRI image then analyzed signal to Noise Ratio (SNR) and Contrast to Noise Ratio (CNR). The best effect and image quality obtained by pre saturation and flow compensation (GMN) treatment with SNR value on tissue was 328,7 at vertebra cervical, 278,6 at spinal cord, 366,6 at discus, 596,3 at CSF. While CNR tissue value was 78,6 at vertebra cervical, 257,6 at spinal cord, 274,8 at discus, and336,3 at CSF followed by the decrease of flow artifact in the amount of 160,4. Conclusion shows that the image with both pre saturation and flow compensation (GMN) treatment on T2 TSE sagital can reduce flow artifact signal on the spinal cord tissue. Keywords : Pre saturation, flow compensation, gradient moment nulling (GMN), MRI Cervical.

scholarly journals Analisis Pembobotan T2 Turbo Spin Echo (TSE) brain MRI Potongan Axial dengan Penggunaan Sensitivity Encoding (SENSE) dan Tanpa Penggunaan Sense : Evaluasi pada Signal to Noise Ratio (SNR) dan Scan Time

2016 ◽  
Vol 2 (2) ◽  
pp. 148-153
Author(s):  
Fani Susanto ◽  
A. Gunawan Santoso ◽  
Bagus Abimanyu
Keyword(s):  
Signal To Noise Ratio ◽  
Spin Echo ◽  
Brain Mri ◽  
Statistical Test ◽  
Turbo Spin Echo ◽  
Signal To Noise ◽  
Turbo Spin ◽  
Sensitivity Encoding ◽  
Scan Time ◽  
Noise Ratio

Background: On examination brain MRI often finds non-cooperative patients, requiring rapid acquisition techniques. The parallel imaging sensitivity encoding (SENSE) technique utilizes spatial RF coated phased array information to reduce acquisition time by reducing the K space sampling line to produce good quality and spatial resolution, but has a limitation of signal-to-noise ratio (SNR) reduction. SENSE is used with MRI sequence pulses one of them turbo spin echo (TSE). The purpose of this study was to determine the difference of SNR and scan time on TSE T2 weighting brain MRI axial slices between use SENSE and without SENSE.Methods: This research is quantitative study with experimental approach. The data were collected from May to June 2016 at the Radiology Installation of Premier Bintaro Hospital by calculating the SNR through the software for the region of interest (ROI) and calculating the scan time through the scan timer on the workstation monitor. Data analysis was done by statistical test with SPPS 16 application using paired T-test and descriptiveResults: From the result of statistical test, it is known that SNR at TSE T2 weighting between with and without SENSE is obtained p-value 0,000 (p 0, 05). This is because the encoding of the both image are different, On TSE T2 weighting image without SENSE there is the use 1800 pulses approaching the effective TE so the shallow gradient produces maximum echo, while on TSE T2 weighting with SENSE there is a reduction of phase encoding row in K space and the presence of g-factor causes the SNR to decrease. From descriptive analysis result, is known that scan time on TSE T2 weighting between with and without SENSE usage is obtained by reduction of scan time for 1 minute 24 seconds (49, 01%). This is because the acquisition technique between the both image are different, on the TSE T2 weighting  without SENSE there is ETL in charging K space, whereas on the TSE T2 Weighting  with  SENSE there is R-factor causing the sampling not to fill all K space so that scanning time is reduced.Conclusion: There are SNR and scan time differences on TSE T2 weighting brain MRI of the axial slices with SENSE and without SENSE usage.

scholarly journals The Effect Of Number Of Excitation (Nex) Variation And Blade Technique On T2 Image Quality TSE Sagital Knee MRI

2019 ◽  
Vol 21 (1) ◽  
pp. 32
Author(s):  
Fella Ustia Nirmala
Keyword(s):  
Image Quality ◽  
Spin Echo ◽  
Cruciate Ligament ◽  
Region Of Interest ◽  
Turbo Spin Echo ◽  
Good Image Quality ◽  
Turbo Spin ◽  
Knee Mri ◽  
Noise Ratio ◽  
Anterior Cruciate

ABSTRACT The research has been conducted entitled Influence of Variation Number of Excitation (NEX) and BLADE Technique on Image Quality T2 TSE Sagital Knee MRI. This research was conducted at Haji General Hospital Surabaya by using MRI 1.5 Tesla modalities. The usage of BLADE technique combined with the NEX 1 and NEX 2 variations performed on sagittal tissue of the knee and using a Turbo Spin Echo (TSE) sequence with T2 weighting. Data analysis was done quantitatively by using Region of Interest (ROI) method on MRI computer then analyzed Sinyal to Noise Ratio (SNR) and Contrast to Noise Ratio (CNR). From the research, good image quality result obtained by using BLADE technique on NEX 2 variation with SNR of tissues was 130,71 for Fluid, 5,54 for Meniscus, 12,88 for Anterior Cruciate Ligament (ACL) and 5,95 for Posterior Cruciate Ligament (PCL), whereas the CNR value of tissues was 125.16 for fluid-meniscus, 117.82 for ACL-fluid and 124.76 for fluid-PCL. Keywords : NEX , TSE, T2 weighting, MRI Knee.

scholarly journals High-Resolution Simultaneous Multi-Slice Accelerated Turbo Spin-Echo Musculoskeletal Imaging: A Head-to-Head Comparison With Routine Turbo Spin-Echo Imaging

2021 ◽  
Vol 12 ◽  
Author(s):  
Feifei Gao ◽  
Zejun Wen ◽  
Shewei Dou ◽  
Xiaojing Kan ◽  
Shufang Wei ◽  
...  
Keyword(s):  
Image Quality ◽  
Knee Joint ◽  
Ankle Joint ◽  
Spin Echo ◽  
Motion Artifacts ◽  
Knee Joints ◽  
Turbo Spin Echo ◽  
Turbo Spin ◽  
Scanning Time ◽  
Noise Ratio

Background/Aim: The turbo spin-echo (TSE) sequence is widely used for musculoskeletal (MSK) imaging; however, its acquisition speed is limited and can be easily affected by motion artifacts. We aimed to evaluate whether the use of a simultaneous multi-slice TSE (SMS-TSE) sequence can accelerate MSK imaging while maintaining image quality when compared with the routine TSE sequence.Methods: We prospectively enrolled 71 patients [mean age, 37.43 ± 12.56 (range, 20–67) years], including 37 men and 34 women, to undergo TSE and SMS sequences. The total scanning times for the wrist, ankle and knee joint with routine sequence were 14.92, 13.97, and 13.48 min, respectively. For the SMS-TSE sequence, they were 7.52, 7.20, and 6.87 min. Quantitative parameters, including the signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR), were measured. Three experienced MSK imaging radiologists qualitatively evaluated the image quality of bone texture, cartilage, tendons, ligament, meniscus, and artifact using a 5-point evaluation system, and the diagnostic performance of the SMS-TSE sequences was evaluated.Results: Compared with the routine TSE sequences, the scanning time was lower by 49.60, 48.46, and 49.04% using SMS-TSE sequences for the wrist, ankle, and knee joints, respectively. For the SNR comparison, the SMS-TSE sequences were significantly higher than the routine TSE sequence for wrist (except for Axial-T2WI-FS), ankle, and knee joint MR imaging (all p < 0.05), but no statistical significance was obtained for the CNR measurement (all p > 0.05, except for Sag-PDWI-FS in ankle joint). For the wrist joint, the diagnostic sensitivity, specificity, and accuracy were 88.24, 100, and 92%. For the ankle joint, they were 100, 75, and 93.33%. For the knee joint, they were 87.50, 85.71, and 87.10%.Conclusion: The use of the SMS-TSE sequence in the wrist, ankle, and knee joints can significantly reduce the scanning time and show similar image quality when compared with the routine TSE sequence.

scholarly journals Values of Apparent Diffusion Coefficient and Lesion-to-Spinal Cord Signal Intensity in Diagnosing Solitary Pulmonary Lesions: Turbo Spin-Echo versus Echo-Planar Imaging Diffusion-Weighted Imaging

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Qiang Lei ◽  
Qi Wan ◽  
Lishan Liu ◽  
Jianfeng Hu ◽  
Wei Zuo ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Diffusion Coefficient ◽  
Image Quality ◽  
Diffusion Weighted Imaging ◽  
Spin Echo ◽  
Turbo Spin Echo ◽  
Planar Imaging ◽  
Turbo Spin ◽  
Apparent Diffusion ◽  
Echo Planar

Objective. This study is aimed at comparing the image quality and diagnostic performance of mean apparent diffusion coefficient (ADC) and lesion-to-spinal cord signal intensity ratio (LSR) derived from turbo spin-echo diffusion-weighted imaging (TSE-DWI) and echo-planar imaging- (EPI-) DWI in patients with a solitary pulmonary lesion (SPL). Methods. 33 patients with SPL underwent chest imaging using EPI-DWI and TSE-DWI with b = 600  s/mm2 in free breathing. A comparison of the distortion ratio (DR), signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) was drawn between the two techniques using a Wilcoxon signed-rank test. The interprotocol reproducibility between quantitative parameters of EPI-DWI and TSE-DWI was evaluated using a Bland-Altman plot. ADCs and LSRs derived from EPI-DWI and TSE-DWI were calculated and compared between malignant and benign groups using the Mann–Whitney test. Results. TSE-DWI had similar SNR and CNR compared with EPI-DWI. DR was significantly lower on TSE-DWI than EPI-DWI. ADC and LSR showed slightly higher values with TSE-DWI, while the Bland-Altman analysis showed unacceptable limits of agreement between the two sequences. ADC and LSR of both DWI techniques differed significantly between lung cancer and benign lesions ( P < 0.05 ). The LSR(EPI-DWI) showed the highest area under the curve ( AUC = 0.818 ), followed by ADC(EPI-DWI) ( AUC = 0.789 ), ADC(TSE-DWI) ( AUC = 0.781 ), and LSR(TSE-DWI) ( AUC = 0.748 ), respectively. Among these parameters, the difference in diagnostic accuracy was not statistically significant. Conclusions. TSE-DWI provides significantly improved image quality in patients with SPL as compared with EPI-DWI. However, there was no difference in diagnostic efficacy between these two techniques, according to ADC and LSR.

Spinal cord functional MRI at 3 T: Gradient echo echo-planar imaging versus turbo spin echo

NeuroImage ◽  
2008 ◽  
Vol 43 (2) ◽  
pp. 288-296 ◽  
Author(s):  
C.J.C. Bouwman ◽  
J.T. Wilmink ◽  
W.H. Mess ◽  
W.H. Backes
Keyword(s):  
Spinal Cord ◽  
Functional Mri ◽  
Spin Echo ◽  
Echo Planar Imaging ◽  
Turbo Spin Echo ◽  
Gradient Echo ◽  
Planar Imaging ◽  
Turbo Spin ◽  
Echo Planar

scholarly journals Single shot echo planar imaging (ssEPI) vs single shot turbo spin echo (ssTSE) DWI of the orbit in patients with ocular melanoma

2020 ◽  
pp. 20200825
Author(s):  
Ekim Gumeler ◽  
Safak Parlak ◽  
Gozde Yazici ◽  
Erdem Karabulut ◽  
Hayyam Kiratli ◽  
...  
Keyword(s):  
Image Quality ◽  
Uveal Melanoma ◽  
Spin Echo ◽  
Geometric Distortion ◽  
Single Shot ◽  
Turbo Spin Echo ◽  
Turbo Spin ◽  
Echoplanar Imaging ◽  
Noise Ratio ◽  
Signal Intensities

Objectives: Diffusion weighted imaging (DWI) has become important for orbital imaging. However, the echoplanar imaging (EPI) DWI has inherent obstacles due to susceptibility to magnetic field inhomogeneities. We conducted a comparative study assessing the image quality of orbits in a patient cohort with uveal melanoma (UM). We hypothesized that single shot turbo spin echo (ssTSE) DWI would have better image quality in terms of less distortion and artifacts and yield better tissue evaluation compared to ssEPI-DWI. Methods: ssEPI-DWI and ssTSE-DWI of orbits were obtained from 50 patients with uveal melanoma who were prospectively enrolled in the study. Distortion ratio (DR), signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), diffusion signal properties, and apparent diffusion coefficient (ADC) values were collected and compared between ssEPI-DWI and ssTSE-DWI. Two reviewers evaluated and compared the geometric distortion, susceptibility and ghosting artifacts, resolution, demarcation of ocular mass, and overall quality. Results: A higher DR was found in ssEPI-DWI compared to ssTSE-DWI (p < 0.001). SNR and CNR were lower for the temporal lobe cortex (p ≤ 0.004), but higher for melanoma in ssEPI-DWI than ssTSE-DWI (p ≤ 0.037). Geometric distortion and artifacts were more common in ssEPI-DWI (p < 0.001). Resolution (p ≤ 0.013) and overall quality (p < 0.001) were better in ssTSE-DWI. Ocular masses were demarcated better on ssEPI-DWI (p ≤ 0.002). Significant negative correlations between T1 and T2 signal intensities (r = −0.369, p ≤ 0.008) and positive correlations between T2 and both DWI signal intensities (r = 0.686 and p < 0.001 for ssEPI-DWI, r = 0.747 and p < 0.001 for ssTSE-DWI) were revealed. Conclusion: With less geometric distortion and susceptibility artifacts, better resolution, and overall quality, ssTSE-DWI can serve as an alternative to ssEPI-DWI for orbital DWI. Advances in knowledge: ssTSE-DWI can be a better alternative of diffusion imaging of orbits with less susceptibility artifact and geometric distortion compared to ssEPI-DWI.

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