scholarly journals Fat suppression for1H MRSI at 7T using spectrally selective adiabatic inversion recovery

2008 ◽  
Vol 59 (5) ◽  
pp. 980-988 ◽  
Author(s):  
Priti Balchandani ◽  
Daniel Spielman
Keyword(s):  
Fat Suppression ◽  
Inversion Recovery ◽  
Spectrally Selective ◽  
Adiabatic Inversion

scholarly journals Analisis Informasi Citra MRI Genu Potongan Aksial antara Sekuen Short TAU Inversion Recovery (STIR) dan Sekuen T2-Spectral Attenuation Inversion Recovery (T2-SPAIR)

2016 ◽  
Vol 2 (1) ◽  
pp. 103-110
Author(s):  
Thuthit Dwi Astuti ◽  
Emi Murniati ◽  
Sri Mulyati
Keyword(s):  
Quantitative Research ◽  
Fat Suppression ◽  
Inversion Recovery ◽  
Image Information ◽  
Mri Examination ◽  
Time Scanning ◽  
Significant Difference ◽  
Suppression Technique ◽  
Spectral Attenuation ◽  
Short Tau Inversion Recovery

Backgrounds: Genu MRI examination, according to Moeller (2003) and Westbrook (2008), was done by one fat supression technique in every slice. Radiology Installation of PAU dr.S.Hardjolukito Yogyakarta Hospital used two types of fat suppression technique those are STIR and T2-SPAIR. This study aims to find out the image differences between STIR and T2-SPAIR and to determine the fat suppresion technique that produces better image information of axial genu MR imaging.Methods: This research was a quantitative research with an experimental approach. Subjects of this study was image of axial genu MRI examination between STIR and T2- SPAIR in Radiology Installation of PAU dr.S.Hardjolukito Yogyakarta Hospital. The axial genu MR imaging STIR and T2-SPAIR assessed by three radiology phisicians using questioner. Data were statistically analyzed using Wilcoxon Sign Test.Results: The results showed a significant difference in all categories of assessment criteria between STIR and T2-SPAIR. In this study, the T2-SPAIR fat suppression technique produced better image information than STIR, whereas T2-SPAIR fat suppress signals was stronger than STIR.Conclusion: T2-SPAIR fat suppress signal was stronger than STIR that showed better image information and shorter time scanning

scholarly journals A Study of Fat Suppression Using Spectrally Selected Inversion Recovery Pulse

1998 ◽  
Vol 54 (5) ◽  
pp. 646-652 ◽  
Author(s):  
TOSHIO TSUCHIHASHI ◽  
SATOSHI YOSHIZAWA ◽  
TOSHIO MAKI ◽  
ISAO FUZITA ◽  
TAKESHI SUZUKI
Keyword(s):  
Fat Suppression ◽  
Inversion Recovery ◽  
Inversion Recovery Pulse

Detection of nasopharyngeal carcinoma: fast short time inversion recovery images compared with fat suppression, contrast enhancedT1weighted spin echo images

2001 ◽  
Vol 74 (885) ◽  
pp. 805-810 ◽  
Author(s):  
S Yamamoto ◽  
H Takano ◽  
K Motoori ◽  
T Ueda ◽  
M Ikeda ◽  
...  
Keyword(s):  
Nasopharyngeal Carcinoma ◽  
Spin Echo ◽  
Fat Suppression ◽  
Inversion Recovery ◽  
Time Inversion ◽  
Short Time Inversion Recovery ◽  
Short Time

scholarly journals MR imaging of scaphoid fractures. Fat-saturated T2-weighted and Short tau inversion recovery images.

2017 ◽  
Vol 3 (1) ◽  
pp. 11
Author(s):  
Louise Meincke ◽  
Ivanov Radev Dimitar ◽  
Rie Eriksen ◽  
Carsten Ammitzbøl Lauridsen
Keyword(s):  
Prospective Study ◽  
Image Contrast ◽  
Fat Suppression ◽  
Inversion Recovery ◽  
Scaphoid Bone ◽  
Bone Bruise ◽  
Clinical Test ◽  
Spin Echo Sequence ◽  
Significant Difference ◽  
Short Tau Inversion Recovery

Objective: Traumatic injuries of os scaphoideum are serious, and might lead to two main grades of consequences (i.e. osteoarthrosis or avascular necrosis), if a fracture remains undiagnosed. Bone bruise may be the only pathological sign of pain which can last for week or month. Articles describe the importance of early MRI and hereby predict bone bruise with the help of fat suppression sequence; however, only a limited selection articles compares various fat suppression techniques. The purpose of this prospective study was to compare the short tau inversion recovery (STIR) and T2 fat saturation (FAT SAT) sequences, sectional directed along the scaphoid bone axis. In relation to background fat intensity suppression, this study sought the sequence that best evaluated posttraumatic bone marrow edema (bone bruise) on scaphoid injury musculoskeletal magnetic resonance imaging (MRI, 1.5 T extremity scanner).Materials and methods: Two hundred and fifty-one patients with relevant trauma and positive clinical test for scaphoid bone fractures, exceeding no more than 14 days, underwent MRI examinations. A fast STIR and T2 FAT SAT fast spin echo sequence (FSE) were obtained using a comparable parameter setting (scan time ca. 3 minutes). Three experienced readers (one radiographer and two radiologists) carried out the evaluation blinded to each other’s, based on a quantitative assessment of size (area) and image quality (image contrast, IC and contrast-to-noise ratio, CNR). The study period lasted March 2014-April 2015. Sixty patients met the inclusion criteria and were enrolled. This prospective study was ethically approved by the institutional review board.Results: There were no significant difference between the bone bruise areas (P=0.45, P=0.44 and P=0.83) or CNR (P=0.31, P=0.38 and P=0.17). However, image contrast showed significant difference in favour of T2 FAT SAT in all three readers’ reports (P<0.05, P<0.05 and P<0.05).Conclusions: The two sequences appear almost identical. An interchangeable usage of the two sequences was found being acceptable for the diagnosis if the protocol is composed appropriately (1.5T). However, the T2 FAT SAT provided a higher image contrast by specific settings (e.g. short TI = 125 ms) compared to STIR.

scholarly journals Novel rapid fat suppression strategy with spectrally selective pulses

2005 ◽  
Vol 54 (6) ◽  
pp. 1569-1574 ◽  
Author(s):  
Qi Peng ◽  
Roderick W. McColl ◽  
Jihong Wang ◽  
Paul T. Weatherall
Keyword(s):  
Fat Suppression ◽  
Selective Pulses ◽  
Spectrally Selective ◽  
Suppression Strategy

Double Inversion Recovery MRI with Fat Suppression at 7 Tesla: Initial Experience

2010 ◽  
Vol 20 (1) ◽  
pp. 87-92 ◽  
Author(s):  
Guillaume Madelin ◽  
Niels Oesingmann ◽  
Matilde Inglese
Keyword(s):  
Fat Suppression ◽  
Inversion Recovery ◽  
Double Inversion Recovery ◽  
7 Tesla ◽  
Initial Experience

scholarly journals The Influence of Fat Suppression Technique on Diffusion-weighted (DW) MRI in Lung Cancer

2017 ◽  
pp. 5167-5176
Author(s):  
Alexander Weller ◽  
MV Papoutsaki ◽  
M Orton ◽  
M Blackledge ◽  
D Ap Dafydd ◽  
...  
Keyword(s):  
Statistical Significance ◽  
Free Breathing ◽  
Fat Suppression ◽  
Inversion Recovery ◽  
Related Sequence ◽  
Thoracic Inlet ◽  
Diagnostic Quality ◽  
Diffusion Weighted ◽  
Adc Values ◽  
Fat Suppression Techniques

Purpose: To qualitatively and quantitatively investigate the effect of common vendor-related sequence variations in fat suppression techniques on the diagnostic performance of free-breathing DW protocols for lung imaging.Methods: 8 patients with malignant lung lesions were scanned in free breathing using two diffusion-weighted (DW) protocols with different fat suppression techniques: DWA used short-tau inversion recovery (STIR), and DWB used Spectral Adiabatic Inversion Recovery (SPAIR). Both techniques were obtained at two time points, between 1 hour and 1 week apart. Image quality was assessed using a 5-point scoring system. The number of lesions visible within lung, mediastinum and at thoracic inlet on the DW (b=800 s/mm2) images was compared. Signal-to-noise ratios (SNR) were calculated for lesions and para-spinal muscle. Repeatability of ADC values of the lesions was estimated for both protocols together and separately.Results: There was a signal void at the thoracic inlet in all patients with DWB but not with DWA. DWA images were rated significantly better than DWB images overall quality domains. (Cohen’s κ = 1). Although 8 more upper mediastinal/thoracic inlet lymph nodes were detected with DWA than DWB, this did not reach statistical significance (p = 0.23). Tumour ADC values were not significantly different between protocols (p=0.93), their ADC reproducibility was satisfactory (CoV=7.7%) and repeatability of each protocol separately was comparable (CoVDWA=3.7% (95% CI 2.5 – 7.1%) and CoVDWB=4.6% (95% CI 3.1 – 8.8%)).Conclusion: In a free-breathing DW-MRI protocol for lung, STIR fat suppression produced images of better diagnostic quality than SPAIR, while maintaining comparable SNR and providing repeatable quantitative ADC acceptable for use in a multicentre trial setting.

scholarly journals Myelin Imaging in Human Brain Using a Short Repetition Time Adiabatic Inversion Recovery Prepared Ultrashort Echo Time (STAIR-UTE) MRI Sequence in Multiple Sclerosis

Radiology ◽  
2020 ◽  
Vol 297 (2) ◽  
pp. 392-404 ◽  
Author(s):  
Ya-Jun Ma ◽  
Hyungseok Jang ◽  
Zhao Wei ◽  
Zhenyu Cai ◽  
Yanping Xue ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Human Brain ◽  
Inversion Recovery ◽  
Ultrashort Echo Time ◽  
Repetition Time ◽  
Echo Time ◽  
Adiabatic Inversion ◽  
Myelin Imaging
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