scholarly journals The Qualitative Analysis of Single Shot Fast Spin Echo (SSFSE) and Maximum Intensity Projection (MIP) on Magnetic Resonance Cholangiopancreatography

2012 ◽  
Vol 17 (2) ◽  
pp. 138-144
Author(s):  
Cheol-Soo Park ◽  
Jae-Hwan Cho ◽  
Hae-Kag Lee ◽  
Kyung-Rae Dong ◽  
Woon-Kwan Chung ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Qualitative Analysis ◽  
Spin Echo ◽  
Maximum Intensity Projection ◽  
Magnetic Resonance Cholangiopancreatography ◽  
Maximum Intensity ◽  
Fast Spin Echo ◽  
Single Shot ◽  
Fast Spin

scholarly journals Comparison of 3D Maximum intensity projection (MIP) reconstruction and 2D T2 Half-Fourier Acquisition Single-Shot Turbo Spin-Echo (HASTE) sequence in magnetic resonance cholangiopancreatography

2014 ◽  
Vol 4 (1) ◽  
pp. 40-44
Author(s):  
Fuad Julardžija ◽  
Adnan Šehić ◽  
Damir Jaganjac ◽  
Esad Voloder ◽  
Srećko Mađura ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Confidence Interval ◽  
Standard Error ◽  
Spin Echo ◽  
Maximum Intensity Projection ◽  
Magnetic Resonance Cholangiopancreatography ◽  
Maximum Intensity ◽  
Single Shot ◽  
Turbo Spin Echo ◽  
Turbo Spin

Introduction: Magnetic resonance cholangiopancreatography (MRCP) is a method that allows noninvasive visualization of pancreatobiliary tree and does not require contrast application. It is a modern method based on heavily T2-weighted imaging (hydrography), which uses bile and pancreatic secretions as a natural contrast medium. Certain weaknesses in quality of demonstration of pancreatobiliary tract can be observed in addition to its good characteristics. Our aim was to compare the 3D Maximum intensity projection (MIP) reconstruction and 2D T2 Half-Fourier Acquisition Single-Shot Turbo Spin-Echo (HASTE) sequence in magnetic resonance cholangiopancreatography.Methods: During the period of one year 51 patients underwent MRCP on 3T „Trio“ system. Patients of different sex and age structure were included, both outpatient and hospitalized. 3D MIP reconstruction and 2D T2 haste sequence were used according to standard scanning protocols.Results: There were 45.1% (n= 23) male and 54.9% (n=28) female patients, age range from 17 to 81 years. 2D T2 haste sequence was more susceptible to respiratory artifacts presence in 64% patients, compared to 3D MIP reconstruction with standard error (0.09), result significance indication (p=0.129) and confidence interval (0.46 to 0.81). 2D T2 haste sequences is more sensitive and superior for pancreatic duct demonstration compared to 3D MIP reconstruction with standard error (0.07), result significance indication (p=0.01) and confidence interval (0.59 to 0.87)Conclusion: In order to make qualitative demonstration and analysis of hepatobiliary and pancreatic system on MR, both 2D T2 haste sequence in transversal plane and 3D MIP reconstruction are required.

Cine Magnetic Resonance Imaging with Single-Shot Fast Spin Echo for Evaluation of Dysphagia and Aspiration

Dysphagia ◽  
2006 ◽  
Vol 21 (3) ◽  
pp. 156-162 ◽  
Author(s):  
Dana M. Hartl ◽  
Frédéric Kolb ◽  
Evelyne Bretagne ◽  
Patrick Marandas ◽  
Robert Sigal
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Spin Echo ◽  
Cine Magnetic Resonance Imaging ◽  
Fast Spin Echo ◽  
Single Shot ◽  
Resonance Imaging ◽  
Fast Spin

scholarly journals Contrast-Enhanced Magnetic Resonance Cholangiography: Practical Tips and Clinical Indications for Biliary Disease Management

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Stefano Palmucci ◽  
Federica Roccasalva ◽  
Marina Piccoli ◽  
Giovanni Fuccio Sanzà ◽  
Pietro Valerio Foti ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Spin Echo ◽  
Biliary Tree ◽  
Magnetic Resonance Cholangiography ◽  
Fast Spin Echo ◽  
Single Shot ◽  
Biliary Disease ◽  
Thin Sections ◽  
Contrast Enhanced ◽  
Fast Spin

Since its introduction, MRCP has been improved over the years due to the introduction of several technical advances and innovations. It consists of a noninvasive method for biliary tree representation, based on heavily T2-weighted images. Conventionally, its protocol includes two-dimensional single-shot fast spin-echo images, acquired with thin sections or with multiple thick slabs. In recent years, three-dimensional T2-weighted fast-recovery fast spin-echo images have been added to the conventional protocol, increasing the possibility of biliary anatomy demonstration and leading to a significant benefit over conventional 2D imaging. A significant innovation has been reached with the introduction of hepatobiliary contrasts, represented by gadoxetic acid and gadobenate dimeglumine: they are excreted into the bile canaliculi, allowing the opacification of the biliary tree. Recently, 3D interpolated T1-weighted spoiled gradient echo images have been proposed for the evaluation of the biliary tree, obtaining images after hepatobiliary contrast agent administration. Thus, the acquisition of these excretory phases improves the diagnostic capability of conventional MRCP—based on T2 acquisitions. In this paper, technical features of contrast-enhanced magnetic resonance cholangiography are briefly discussed; main diagnostic tips of hepatobiliary phase are showed, emphasizing the benefit of enhanced cholangiography in comparison with conventional MRCP.

scholarly journals Role of Secretin-Enhanced Magnetic Resonance Cholangiopancreatography in the Evaluation of Patients Following Pancreatojejunostomy

2013 ◽  
Vol 3 ◽  
pp. 7 ◽  
Author(s):  
Munazza Anis ◽  
Koenraad Mortele
Keyword(s):  
Magnetic Resonance ◽  
Pancreatic Duct ◽  
Spin Echo ◽  
Statistical Significance ◽  
Magnetic Resonance Cholangiopancreatography ◽  
Subjective Assessment ◽  
The Body ◽  
Fast Spin Echo ◽  
Single Shot

Objective: This study was conducted to assess the role of secretin-enhanced magnetic resonance cholangiopancreatography (S-MRCP) in the evaluation of patients following pancreatico-jejunal anatomosis. Materials and Methods: S-MRCP studies (n = 83) performed at Brigham and Women's Hospital between 1/2005 and 7/2005 were retrospectively reviewed. Among these, there were 13 patients (10 females, 3 males; mean age = 45 years, range = 18-74 years) who were evaluated with S-MRCP following pancreatojejunal anatomosis. Single-shot fast spin-echo T2-weighted thick slab dynamic MRCP images obtained before and every minute (for 10 min) after IV injection of secretin (2 mcg/kg body weight of SecreFloTM IV over 1 min) were reviewed retrospectively and independently by 3 readers. Image analysis included measurement of the main pancreatic duct (MPD) diameter and subjective assessment of the grade of visualization of the MPD remnant. The amount of jejunal fluid and visualization of the pancreatico-jejunal anatomosis pre-and post-secretin were also documented. Direct correlation with endoscopic retrograde cholangiopancreatography (ERCP) finding was available in six of the 13 cases. Results: The MPD diameter and MPD remnant visualization improved post-secretin for 1/3 readers. The number of pancreatico-jejunal anastomoses and the amount of jejunal fillings pre-and post-secretin was seen to improve significantly for 1 of the 3 readers. For Reader 1, the mean MPD diameter in the body of the pancreas, on the pre-and post-secretin image, was 3.2 ± 1.3 mm and 3.8 ± 1.9 mm, respectively. There was no statistical difference in the values pre- and post-secretin in the MPD diameter (P = 0.07), MPD visualization (P = 0.16) and the number of pancreatico-jejunal anastomoses seen (P = 0.125 5/13 pre- and 9/13 post-secretin). Statistical significance was seen in the amount of jejunal filling (P = 0.01) after secretin. For Reader 2, the MPD diameter pre-and post-secretin was 4 ± 2 and 3.9 ± 2.1 mm, respectively (P = 0.89). The MPD visualization (P = 0.19) and degree of jejunal filling (P = 0.7) did not improve significantly. There were 3/13 pancreatico-jejunostomy anastomoses seen pre- and 8/13 seen post-secretin (P = 0.06). The values for Reader 3 reached a statistical significance for the measurement of MPD (P = 0.032). In addition, MPD visualization (P = 0.038), the number of anastomoses seen (P = 0.016) and jejunal filling (P = 0.006) were also significantly improved. Conclusion: The addition of intravenous secretin to an MRCP study in the evaluation of patients following pancreatojejunal anastomosis does not significantly impact the visualization of the pancreatic duct. However, secretin may improve the assessment of the pancreatico-jejunal anastomosis.

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.

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