scholarly journals Analisa Informasi Citra MRI Cervical Potongan Sagital Pada Variasi Nilai Time Repetition (TR) Dengan Sekuens Short Tau Inversion Recovery (STIR)

2020 ◽  
Vol 6 (2) ◽  
pp. 79-85
Author(s):  
Siti Masrochah ◽  
Fatimah Fatimah ◽  
Nurdianty Yunitaningrum
Keyword(s):  
Cervical Spine ◽  
Inversion Recovery ◽  
Image Information ◽  
Time Value ◽  
American College Of Rheumatology ◽  
Pulse Inversion ◽  
Repetition Time ◽  
Short Tau Inversion Recovery ◽  
Test Result ◽  
Selection Of

Background: One of MRI technique using STIR sequences, such as the cervical examination. STIR sequences used in the cervical spine due to the cervical spine is surrounded by lots of fluids and fat, to reinforce the picture of the cervical spine. According to Braun in 2003 in an article in the American College of Rheumatology, TR on STIR used is 4000 ms. Meanwhile, according to Erika J. Ulbribh in 2011 in an article in the Journal of Magnetic Resonance Imaging TR on STIR sequences were used that 4860 ms. Based on the writer's observation in several hospitals with the same flight characteristics, the value of TR on STIR sequences different - different. At one hospital using TR 5000 ms, then at other hospitals using the TR 3000 ms. TR value is used based on the theory of 2000 ms.Methods: This research is a quantitative study with an experimental approach. Data were collected from May to June 2016 in the. The subjects of this study are volunteers by using a variation of the value of Time Repetition. It is caused during data capture none of the patients with the diagnosis of the lesion or tumour. image of five variations Repetition Time value is 4090 ms, 5190 ms, 6290 ms, 7390 ms and 8490 ms. Selection of variation based on the value of TR used.Results: From the statistical test result known that There are differences in image information MRI Cervical on the variation of the Time Repetition 4090 ms, TR 5190 ms, TR 6290 ms, TR 7390 ms, and TR 8490 ms to the value of ρ value of 0.000 (ρ 0, 05).That is because Repetition Time (TR) sequences Inversion Recovery (IR) should be long enough to provide opportunities so that Net Magnetization Vectors (NMV) can be in full recovery before the next 180 RF pulse inversion. If TR is too short then each network will be recovery with different levels which will ultimately affect the weighting (weighting) is generated.Conclusion: There are differences in Cervical MRI image information on the variation of the value of 4090 ms Repetition Time, TR 5190 ms, TR 6290 ms, TR 7390 ms, and TR 8490 ms to the value of ρ value of 0.000 (ρ 0.05).

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 Tophaceous gout of the atlantoaxial joint: a case report

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Andrew Benjamin Romero ◽  
Evan Paul Johnson ◽  
John S. Kirkpatrick
Keyword(s):  
Cervical Spine ◽  
Tissue Sample ◽  
Significant Finding ◽  
Atlantoaxial Joint ◽  
Tophaceous Gout ◽  
Case Presentation ◽  
American College Of Rheumatology ◽  
European League Against Rheumatism ◽  
History Of ◽  
Clinically Significant

Abstract Background To report the occurrence of tophaceous gout in the cervical spine and to review the literature on spinal gout. Case presentation This report details the occurrence of a large and clinically significant finding of tophaceous gout in the atlantoaxial joint of the cervical spine in an 82-year-old Caucasian man with a 40-year history of crystal-proven gout and a 3-month history of new-onset progressive myelopathy. The patient's American College of Rheumatology/European League Against Rheumatism (ACR/EULAR) criteria score was 15.0. Conclusion Spinal gout is more common than previously thought, and it should be considered in patients who present with symptoms of myelopathy. Diagnosis can be made without a tissue sample of the affected joint(s) with tools like the ACR/EULAR criteria and the use of the “diagnostic clinical rule” for determining the likelihood of gout. Early conservative management with neck immobilization and medical management can avoid the need for surgical intervention.

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 Do experienced physiotherapists apply equal magnitude of force during a grade I central pa on the cervical spine?

2004 ◽  
Vol 60 (4) ◽  
Author(s):  
M. Conradie ◽  
E. Smit ◽  
M. Louw ◽  
M. Prinsloo ◽  
L. Loubser ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Spinal Disorders ◽  
Joint Mobilization ◽  
Treatment Techniques ◽  
Average Maximum ◽  
Manual Examination ◽  
The Mean ◽  
The Difference ◽  
Posterior Anterior ◽  
Selection Of

Background and purpose: Physiotherapists frequently use central posterior-anterior (PA) joint mobilization techniques for assessing and managing spinal disorders. Manual examination findings provide the basis for the selection of treatment techniques. From the literature it is evident that the level of reliability varies when physiotherapists perform different mobilization techniques. Repeatability of mobilization techniques is important for better physiotherapy management. The aim of the study was to determine whether experienced physiotherapists apply equal magnitude of force during a grade I central PA mobilisation technique on the cervical spine. Another aim was to determine the variation in the magnitude of forceapplied by each individual physiotherapist. Subjects: Sample of convenience, consisting of sixteen (n=16) selected qualified physiotherapists with experience inOrthopaedic Manual Therapy.Methods: A grade I central PA was performed on the Flexiforce TM sensors positioned on C6 of the same asymptomatic model to measure the applied magnitude of force. Two separate measurements, each lasting 30-seconds, were obtained.Results: The average maximum peak force applied by the majority of physiotherapists (87.5%) was between 10.95gand 72g. The difference in the forces applied for the two measurements ranged between 0.64g and 24.4g. The BlandAltman scatterplot determined the mean of the difference between measurement one and two, calculated for the group, was zero. When comparing the two measurements, little variation was noted in the forces applied, as well as the coefficient of variation for each physiotherapist.Conclusion and Discussion: Current results demonstrated good intra-therapist and moderate to good inter-therapist repeatability. Further research is required to generalize results.

scholarly journals Research on Electronic Image Stabilization Technology of Vehicle-Mounted Remote-Controlled Weapon Station

2021 ◽  
Vol 2083 (3) ◽  
pp. 032061
Author(s):  
Shumin Qin ◽  
Lizhen Zhao ◽  
Xingke Tian ◽  
Lidan Li ◽  
Shuyun Liu
Keyword(s):  
System Design ◽  
Robust Stability ◽  
Sensor Data ◽  
Two Stage ◽  
Image Stabilization ◽  
Image Information ◽  
Gyro Sensor ◽  
Image Compensation ◽  
Stable Scheme ◽  
Selection Of

Abstract The image information of the vehicle-mounted remote-controlled weapon station is jittered and blurred when the stance changes or vibrates, which increases the aiming difficulty and observation fatigue of the shooter, in order to realize the stable marching fire of the vehicle-mounted remote-controlled weapon station, the two-stage stable scheme with the shared gyro sensor is adopted in the system design, namely, the aiming device is rigidly fixed on the initially stable weapon platform, and then the electronic image stabilization is carried out. This paper proposes an approach combining two image stabilization schemes: gyro sensor data and image projection registration, optimizes the selection of image compensation data by registering and comparing the results of the two stable data, and uses the special features of the two schemes to improve the robust stability of electronic image stabilization, which ensure the observation effect of video image stabilization of the vehicle-mounted remote-controlled weapon station.

Pulsed ESR Study of the Conduction Electron Spin Center in μc-Si:H

1996 ◽  
Vol 452 ◽  
Author(s):  
Jiang-Huai Zhou ◽  
Satoshi Yamasaki ◽  
Junichi Isoya ◽  
Kazuyuki Ikuta ◽  
Michio Kondo ◽  
...  
Keyword(s):  
Conduction Electron ◽  
Relaxation Times ◽  
Lattice Relaxation ◽  
Inversion Recovery ◽  
Spin Lattice Relaxation ◽  
Recovery Method ◽  
Amorphous Phases ◽  
Spin Lattice ◽  
Pulse Inversion ◽  
Spin Center

AbstractThe spin-lattice relaxation times (T1) of conduction electron (CE) and dangling bond (DB) centers in μc-Si:H have been directly measured using the 3-pulse inversion recovery method. For both CE and DB, the inversion recovery curve follows a stretched exponential form. T1 of DB is about twice the T1 of CE, however the temperature dependence of T1 seems to be the same for both CE and DB and can be approximated by T−4 While the DB echo decay is modulated by both 29Si and 1H nuclei, we found no modulation of the CE echo decay by the H nucleus, indicating that CE centers are located in H-depleted phases in μc-Si:H. The modulation results are direct evidence that CE centers are located in the crystalline grains and DB centers in the amorphous phases.

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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