Comparison of T2 weighted fat suppressed turbo spin echo and contrast enhanced T1 weighted spin echo MRI in nasopharyngeal carcinoma.

1997 ◽  
Vol 70 (840) ◽  
pp. 1208-1214 ◽  
Author(s):  
A D King ◽  
W W Lam ◽  
S F Leung ◽  
Y L Chan ◽  
C Metreweli
Keyword(s):  
Nasopharyngeal Carcinoma ◽  
Spin Echo ◽  
Turbo Spin Echo ◽  
Turbo Spin ◽  
Contrast Enhanced

Contrast-Enhanced Turbo Spin-Echo(TSE) T1-weighted Imaging: Improved Contrast of Enhancing Lesions

1997 ◽  
Vol 37 (3) ◽  
pp. 379
Author(s):  
Sung Wook Choi ◽  
Ghi Jai Lee ◽  
Jae Chan Shim ◽  
Young Ju Lee ◽  
Se Hyung Jeong ◽  
...  
Keyword(s):  
Spin Echo ◽  
Turbo Spin Echo ◽  
Turbo Spin ◽  
Contrast Enhanced

Spiral gradient echo versus cartesian turbo spin echo imaging for sagittal contrast-enhanced fat-suppressed T1 weighted spine MRI: an inter-individual comparison study

2021 ◽  
Author(s):  
Elisabeth Sartoretti ◽  
Sabine Sartoretti-Schefer ◽  
Luuk van Smoorenburg ◽  
Barbara Eichenberger ◽  
Árpád Schwenk ◽  
...  
Keyword(s):  
Spin Echo ◽  
Comparison Study ◽  
Turbo Spin Echo ◽  
Gradient Echo ◽  
Turbo Spin ◽  
Individual Comparison ◽  
Contrast Enhanced ◽  
Spine Mri ◽  
Lesion Conspicuity

Objectives: To compare a novel 3D spiral gradient echo (GRE) sequence with a conventional 2D cartesian turbo spin echo (TSE) sequence for sagittal contrast-enhanced (CE) fat-suppressed (FS) T1 weighted (T1W) spine MRI. Methods: In this inter-individual comparison study, 128 patients prospectively underwent sagittal CE FS T1W spine MRI with either a 2D cartesian TSE (“TSE”, 285 s, 64 patients) or a 3D spiral GRE sequence (“Spiral”, 93 s, 64 patients). Between both groups, patients were matched in terms of anatomical region (cervical/thoracic/lumbar spine and sacrum). Three readers used 4-point Likert scales to assess images qualitatively in terms of overall image quality, presence of artifacts, spinal cord visualization, lesion conspicuity and quality of fat suppression. Results: Spiral achieved a 67.4% scan time reduction compared to TSE. Interreader agreement was high (alpha=0.868-1). Overall image quality (4;[3,4] vs 3;[3,4], p<0.001 – p=0.002 for all readers), presence of artifacts (4;[3,4] vs 3;[3,4] p=0.027 – p=0.046 for all readers), spinal cord visualization (4;[4,4] vs 4;[3,4], p<0.001 for all readers), lesion conspicuity (4;[4,4] vs 4;[4,4], p=0.016 for all readers) and quality of fat suppression (4;[4,4] vs 4;[4,4], p=0.027 – p=0.033 for all readers), were all deemed significantly improved by all three readers on Spiral images as compared to TSE images Conclusion: We demonstrate the feasibility of a novel 3D spiral GRE sequence for improved and rapid sagittal CE FS T1W spine MRI. Advances in knowledge: A 3D spiral GRE sequence allows for improved sagittal CE FS T1W spine MRI at very short scan times.

Magnetic resonance imaging in the investigation of sensorineural hearing loss: is contrast enhancement still necessary?

2001 ◽  
Vol 115 (1) ◽  
pp. 14-21 ◽  
Author(s):  
D. J. Annesley-Williams ◽  
R. D. Laitt ◽  
J. P. R. Jenkins ◽  
R. T. Ramsden ◽  
J. E. Gillespie
Keyword(s):  
Magnetic Resonance ◽  
Contrast Enhancement ◽  
False Positive ◽  
Spin Echo ◽  
False Negative ◽  
Turbo Spin Echo ◽  
Turbo Spin ◽  
Contrast Enhanced ◽  
Negative Case ◽  
T2 Weighted Images

High resolution T2-weighted magnetic resonance (MR) imaging has been proposed as a rapid, inexpensive means of investigating patients with sensorineural deafness, particularly to exclude vestibular schwannomas. Whether the accepted ‘gold standard’ of contrast-enhanced T1-weighted images can be omitted, however, remains controversial. Over a 22-month period the use of axial turbo-spin echo T2-weighted images (T2W) were prospectively compared with contrast-enhanced T1-weighted spin echo scans in the evaluation of 513 patients presenting with audiovestibular symptoms. A 2-D T2W turbo spin echo (TSE) sequence with 3 mm slices was used in 340 patients while a 3-D sequence with overlapping 1 mm slices was used in 173 patients. The T2-weighted image findings were documented and subsequently compared with contrast-enhanced images. With the 2-D sequence 24 patients (25 lesions) had internal auditory meatus (IAM)/cerebello-pontine angle (CPA) masses identified by contrast-enhanced T1-weighted images, all of which were seen on the T2-weighted TSE sequence; there was one false positive ‘mass’ on the T2-weighted scans and one false negative case of IAM dural enhancement on T1-weighted imaging; six were considered normal initially on the T2-weighted images although three were subtly abnormal in retrospect. With the 3-D sequence three acoustic neuromas were all identified correctly with no false positive and only one false negative result (labyrinthitis). The 2-D and 3-D images were judged technically inadequate for clinical assessment in 15 and nine per cent respectively. We conclude that mass lesions of the IAM/CPA can be reliably identified on T2W TSE imaging but labyrinthine lesions may be missed without contrast enhancement. This is of particular importance in planning the management of neurofibromatosis type 2. Non-neoplastic disorders of the inner ear are also likely to be missed.

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