scholarly journals Conspicuity of liver hemangiomas: Short tau inversion recovery, T1, and T2 imaging with gadolinium ethoxybenzyl diethylenetriaminepentaacetic acid

2005 ◽  
Vol 21 (4) ◽  
pp. 391-397 ◽  
Author(s):  
Jeffrey M. Brody ◽  
Leah Schafer ◽  
Glenn A. Tung ◽  
Josy Breuer ◽  
Kohkan Shamsi
Keyword(s):  
Inversion Recovery ◽  
Diethylenetriaminepentaacetic Acid ◽  
T1 And T2 ◽  
Short Tau Inversion Recovery ◽  
Gadolinium Ethoxybenzyl Diethylenetriaminepentaacetic Acid

scholarly journals Generating Virtual Short Tau Inversion Recovery (STIR) Images from T1- and T2-Weighted Images Using a Conditional Generative Adversarial Network in Spine Imaging

Diagnostics ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1542
Author(s):  
Johannes Haubold ◽  
Aydin Demircioglu ◽  
Jens Matthias Theysohn ◽  
Axel Wetter ◽  
Alexander Radbruch ◽  
...  
Keyword(s):  
Inversion Recovery ◽  
Training Dataset ◽  
Validation Dataset ◽  
Generative Adversarial Network ◽  
Diagnostic Quality ◽  
Adversarial Network ◽  
Scanning Time ◽  
T1 And T2 ◽  
Short Tau Inversion Recovery ◽  
T2 Weighted Images

Short tau inversion recovery (STIR) sequences are frequently used in magnetic resonance imaging (MRI) of the spine. However, STIR sequences require a significant amount of scanning time. The purpose of the present study was to generate virtual STIR (vSTIR) images from non-contrast, non-fat-suppressed T1- and T2-weighted images using a conditional generative adversarial network (cGAN). The training dataset comprised 612 studies from 514 patients, and the validation dataset comprised 141 studies from 133 patients. For validation, 100 original STIR and respective vSTIR series were presented to six senior radiologists (blinded for the STIR type) in independent A/B-testing sessions. Additionally, for 141 real or vSTIR sequences, the testers were required to produce a structured report of 15 different findings. In the A/B-test, most testers could not reliably identify the real STIR (mean error of tester 1–6: 41%; 44%; 58%; 48%; 39%; 45%). In the evaluation of the structured reports, vSTIR was equivalent to real STIR in 13 of 15 categories. In the category of the number of STIR hyperintense vertebral bodies (p = 0.08) and in the diagnosis of bone metastases (p = 0.055), the vSTIR was only slightly insignificantly equivalent. By virtually generating STIR images of diagnostic quality from T1- and T2-weighted images using a cGAN, one can shorten examination times and increase throughput.

scholarly journals Disseminated cysticercosis and role of spin echo short tau inversion recovery sequence imaging: Case based review

2017 ◽  
Vol 04 (02) ◽  
pp. 174-180
Author(s):  
Lakshmi Ranganathan ◽  
Venkatraman Karthikeayan ◽  
Arun MM ◽  
Guhan R. ◽  
Venkateswaran KJ ◽  
...  
Keyword(s):  
Spin Echo ◽  
Inversion Recovery ◽  
Inversion Recovery Sequence ◽  
Recovery Sequence ◽  
Short Tau Inversion Recovery ◽  
Case Based

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 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.

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