scholarly journals Optimization image of magnetic resonance imaging (MRI) T2 fast spin echo (FSE) with variation echo train length (ETL) on the rupture tendon achilles case

2017 ◽  
Vol 853 ◽  
pp. 012020
Author(s):  
Akhmad Muzamil ◽  
Achmad Haries Firmansyah
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Spin Echo ◽  
Fast Spin Echo ◽  
Resonance Imaging ◽  
Echo Train Length ◽  
Train Length ◽  
Magnetic Resonance Imaging Mri ◽  
Fast Spin

scholarly journals MAGNETIC RESONANCE IMAGING;

2017 ◽  
Vol 24 (04) ◽  
pp. 560-564
Author(s):  
Yasma Ashraf ◽  
Irum Iqbal ◽  
Shafaat Khatoon
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Predictive Value ◽  
Spin Echo ◽  
Perianal Fistula ◽  
Fast Spin Echo ◽  
Resonance Imaging ◽  
Perianal Fistulas ◽  
Magnetic Resonance Imaging Mri ◽  
Fast Spin

Perianal fistula is defined as an abnormal communication channel between analcanal and perianal skin. Among all the imaging tools Magnetic resonance imaging (MRI) isof choice in the diagnosis and management of perianal fistulas. Objectives: “To determinethe diagnostic accuracy of MR imaging in detection of perianal fistulas and comparing it withper operative findings”. Peroperative findings are taken as gold standard. Place and Durationof Study: This study was carried out in Diagnostic Radiology, Pakistan Institute of MedicalSciences (P.I.M.S) Islamabad, over a period of nine months from 01-02-2012 to 31-10-2012. Forthis collaboration was made with the Department of General Surgery P.I.M.S and Departmentof gynecology (MCH center) PIMS and gastroenterology Department. Patients and Methods:A total of 95 patients were included in study having perianal fistulas on clinical examination.MRI was performed in the patients and T1-weighted fast spin echo (T1W FSE) images weretaken before and after gadolinium injection. Fat suppressed T2-weighted fast spin echo (T2WFSE) images were obtained in all three planes including transverse, sagittal and coronal. Allthe scans were viewed by a single consultant radiologist to avoid observer bias. Results: Outof 95, 81 patients (85.3%) were male and 14 (14.7%) were female. Sensitivity, specificity andaccuracy of magnetic resonance imaging (MRI) was 96.2%, 75.0% and 92.6%, respectively.Positive predictive value was 95.0% and negative predictive value was 80.0%. Conclusion: ourstudy proves that among imaging modalities MRI is of choice for preoperative assessment ofperianal fistulas. It provides highly accurate, noninvasive and relatively very less time consumingmeans of performing pre-operative evaluation, specially the complex, branching fistulas. Thisdiagnostic accuracy not only helps in surgical cure but avoids recurrence and post-operativecomplications like fecal incontinence

Ultra high resolution nonenhanced fast spin echo magnetic resonance imaging: Cost-effective screening for acoustic neuroma in patients with sudden sensorineural hearing loss

1998 ◽  
Vol 119 (4) ◽  
pp. 364-369 ◽  
Author(s):  
Robert L. Daniels ◽  
Clough Shelton ◽  
H. Ric Harnsberger
Keyword(s):  
Magnetic Resonance Imaging ◽  
Hearing Loss ◽  
Magnetic Resonance ◽  
Sensorineural Hearing Loss ◽  
Acoustic Neuroma ◽  
Spin Echo ◽  
Sudden Sensorineural Hearing Loss ◽  
Fast Spin Echo ◽  
Resonance Imaging ◽  
Fast Spin

The financial burden for the evaluation of patients for acoustic neuroma in an otolaryngology practice is substantial. Patients with sudden sensorineural hearing loss represent a portion of that population seen with unilateral, asymmetric auditory symptoms who require investigation for acoustic neuroma. For these patients, gadolinium-enhanced magnetic resonance imaging is the diagnostic gold standard. Auditory brain stem response testing has been used in the past as a screening test for acoustic neuroma, but its apparent sensitivity has fallen as the ability to image smaller acoustic neuromas has improved. Fast spin echo magnetic resonance imaging techniques without gadolinium have been shown to be as effective in the detection of acoustic neuroma as contrast-enhanced magnetic resonance imaging. Limited nonenhanced fast spin echo magnetic resonance imaging now provides an inexpensive alternative for high-resolution imaging of the internal auditory canal and cerebellopontine angle. Fast spin echo magnetic resonance imaging can now be done at a cost approximating auditory brain stem response testing while providing the anatomic information of contrast-enhanced magnetic resonance imaging. Cost analysis was done in the cases of 58 patients with sudden sensorineural hearing loss by comparing the costs for routine workup and screening of acoustic neuroma with the cost of fast spin echo magnetic resonance imaging with the use of screening protocols based on literature review. The potential cost savings of evaluating patients with sudden sensorineural hearing loss with fast spin echo magnetic resonance imaging for acoustic neuroma was substantial, with a 54% reduction in screening costs. In an era of medical economic scrutiny, fast spin echo magnetic resonance imaging has become the most cost-effective method to screen suspected cases of acoustic tumors at our institution by improving existing technology while reducing the cost of providing that technology and eliminating charges for impedance audiometry, auditory brain stem response testing, and contrast-enhanced magnetic resonance imaging.

Magnetic resonance imaging after frontal sinus surgery with fat obliteration

1995 ◽  
Vol 109 (11) ◽  
pp. 1115-1119 ◽  
Author(s):  
R. Keerl ◽  
R. Weber ◽  
G. Kahle ◽  
W. Draf ◽  
J. Constantinidis ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Connective Tissue ◽  
Frontal Sinus ◽  
Spin Echo ◽  
Sinus Surgery ◽  
Fast Spin Echo ◽  
Fatty Tissue ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Mri

AbstractThe obliteration of the frontal sinus via an osteoplastic approach is performed with the aim of achieving a permanent ‘switching off’ by final and conclusive clearing out. For this, freshly harvested abdominal fat has shown itself to be the best clinically. It is possible to demonstrate the vitality of fat transplanted into the frontal sinus without an operation i.e. by a macroscopical and histological examination using magnetic resonance imaging (MRI). The magnetic resonance examinations were carried out on a supraconductive 0.5 T Magnet (Gyroscan T.S.II, Philips Medicine Systems, Eindhoven, Netherlands) with a quadrature (square) head spool. We produced T1-weighted spin echo images (TR: 450–550 ms; TE: 20–25 ms), T2-weighted fast spin echo images or in double-echo technique in transverse orientation (Turbo SE or TR: 2000–2500 ms; TE: 50–90 ms) and short tau inversion recovery (STIR) sequences for fat suppression (TJ: 140 ms; TR: 1400 ms; TE: 30 ms). The fat implanted into the frontal sinus of 11 patients aged 22–65 years, having undergone an osteoplastic frontal sinus operation with obliteration, was examined post-operatively by MRI. Objectives were the time-dependent distribution of portions of vital fatty or connective tissue, the eventual development of necroses or cysts as well as recurrences, inflammatory complications or re-epithelization of the frontal sinus four to 24 months postoperatively. In only six out of 11 cases was vital fatty tissue found. Fatty necrosis occurred five times, whereas in four cases a transformation into granulation tissue and in one case into connective tissue could be seen. All 11 patients were complaint-free. Long-term observations are needed to see if differences in the recurrence rate of frontal sinus disease are dependent on whether the implanted fat remains vital or necrosed and transformed.

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