scholarly journals Half-Fourier acquisition single-shot turbo spin echo imaging in the diagnosis of Morgagni hernia

2001 ◽  
Vol 14 (5) ◽  
pp. 653-657 ◽  
Author(s):  
Dean Tyrell ◽  
Feroze Mohamed ◽  
Constantinos Pavlides ◽  
Steven Kutalek ◽  
Charles Mulhern ◽  
...  
Keyword(s):  
Spin Echo ◽  
Single Shot ◽  
Turbo Spin Echo ◽  
Morgagni Hernia ◽  
Turbo Spin

Most commonly used sequences and clinical protocols for brain and spine magnetic resonance imaging allowing better identification of pathological changes in dogs

2013 ◽  
Vol 16 (1) ◽  
pp. 157-163 ◽  
Author(s):  
Y. Zhalniarovich ◽  
Z. Adamiak ◽  
A. Pomianowski ◽  
M. Jaskólska
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Imaging Modality ◽  
Spin Echo ◽  
Inversion Recovery ◽  
Fast Spin Echo ◽  
Single Shot ◽  
Turbo Spin Echo ◽  
Resonance Imaging ◽  
Turbo Spin

Abstract Magnetic resonance imaging is the best imaging modality for the brain and spine. Quality of the received images depends on many technical factors. The most significant factors are: positioning the patient, proper coil selection, selection of appropriate sequences and image planes. The present contrast between different tissues provides an opportunity to diagnose various lesions. In many clinics magnetic resonance imaging has replaced myelography because of its noninvasive modality and because it provides excellent anatomic detail. There are many different combinations of sequences possible for spinal and brain MR imaging. Most frequently used are: T2-weighted fast spin echo (FSE), T1- and T2-weighted turbo spin echo, Fluid Attenuation Inversion Recovery (FLAIR), T1-weighted gradient echo (GE) and spin echo (SE), high-resolution three-dimensional (3D) sequences, fat-suppressing short tau inversion recovery (STIR) and half-Fourier acquisition single-shot turbo spin echo (HASTE). Magnetic resonance imaging reveals neurologic lesions which were previously hard to diagnose antemortem.

What is the most suitable MR signal index for quantitative evaluation of placental function using Half-Fourier acquisition single-shot turbo spin-echo compared with T2-relaxation time?

2017 ◽  
Vol 59 (6) ◽  
pp. 748-754 ◽  
Author(s):  
Kyoko Nakao Kameyama ◽  
Aki Kido ◽  
Yuki Himoto ◽  
Yusaku Moribata ◽  
Sachiko Minamiguchi ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Spin Echo ◽  
Psoas Muscle ◽  
Single Shot ◽  
T2 Relaxation Time ◽  
Turbo Spin Echo ◽  
T2 Relaxation ◽  
Placental Function ◽  
Turbo Spin ◽  
Psoas Major

Background Half-Fourier acquisition single-shot turbo spin-echo (HASTE) imaging is now widely used for placental and fetal imaging because of its rapidity and low sensitivity to fetal movement. If placental dysfunction is also predicted by quantitative value obtained from HASTE image, then it might be beneficial for evaluating placental wellbeing. Purpose To ascertain the most suitable magnetic resonance (MR) signal indexes reflecting placental function using HASTE imaging. Material and Methods This retrospective study included 37 consequent patients who had given informed consent to MR imaging (MRI) examinations. All had undergone MRI examinations between February 2014 and June 2015. First, the correlation between T2-relaxation time of normal placenta and gestational age (GA) was examined. Second, correlation between signal intensity ratios (SIRs) using HASTE imaging and placental T2-relaxation time were assessed. The SIRs were calculated using placental signal intensity (SI) relative to the SI of the amniotic fluid, fetal ocular globes, gastric fluid, bladder, maternal psoas major muscles, and abdominal subcutaneous adipose tissue. Results Among the 37 patients, the correlation between T2-relaxation time of the 25 normal placentas and GA showed a moderately strong correlation (Spearman rho = –0.447, P = 0.0250). The most significant correlation with placental T2-relaxation time was observed with the placental SIR relative to the maternal psoas major muscles (SIRpl./psoas muscle) (Spearman rho = −0.531, P = 0.0007). Conclusion This study revealed that SIRpl./psoas muscle showed the best correlation to placental T2-relaxation time. Results show that SIRpl./psoas muscle might be optimal as a clinically available quantitative index of placental function.

scholarly journals Additional Merits of Two-dimensional Single Thick-slice Magnetic Resonance Myelography in Spinal Imaging

2012 ◽  
Vol 2 ◽  
pp. 84
Author(s):  
Abhishek Aggarwal ◽  
Rajiv Azad ◽  
Armeen Ahmad ◽  
Pankaj Arora ◽  
Puneet Gupta
Keyword(s):  
Magnetic Resonance ◽  
Spin Echo ◽  
Diagnostic Information ◽  
Single Shot ◽  
Two Dimensional ◽  
Turbo Spin Echo ◽  
Turbo Spin ◽  
Spinal Imaging ◽  
Grade 3 ◽  
Mr Sequences

Objective: To validate the additional merits of two-dimensional (2D) single thick-slice Magnetic Resonance Myelography (MRM) in spinal imaging. Materials and Methods: 2D single thick-slice MRM was performed using T2 half-Fourier acquisition single-shot turbo spin-echo (HASTE) sequence in addition to routine Magnetic resonance (MR) sequences for spine in 220 patients. The images were evaluated for additional diagnostic information in spinal and extra-spinal regions. A three-point grading system was adopted depending upon the utility of MRM in contributing to the detection of spinal or extra-spinal findings. Grade 1 represented no contribution of MRM while grade 3 would indicate that it was essential to detection of findings. Results: Utility of MRM in spine was categorized as grade 3 in 10.9% cases (24/220), grade 2 in 21.8% (48/220) cases and grade 1 in 67.3% cases (148/220). Thus, the overall additional merit of MRM in spine was seen in 32.7% (72/220) of cases. Besides in 14.1% cases (31/220) extra-spinal pathologies were identified. Conclusion: 2D single thick-slice MRM could have additional merits in spinal imaging when used as an adjunct to routine MR sequences.

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