scholarly journals Rapid 3D imaging of the airway by MRI in patients with congenital heart disease: comparison of delayed volume interpolated breath hold examination (VIBE) technique to the turbo spin echo (TSE)

2014 ◽  
Vol 16 (S1) ◽  
Author(s):  
Benjamin Goot ◽  
Sonali Patel ◽  
Brian Fonseca
Keyword(s):  
Congenital Heart Disease ◽  
Heart Disease ◽  
Congenital Heart ◽  
3D Imaging ◽  
Spin Echo ◽  
Breath Hold ◽  
Turbo Spin Echo ◽  
Turbo Spin

Free-breathing BLADE acquisition method improves T2-weighted cardiac MR image quality compared with conventional breath-hold turbo spin-echo cartesian acquisition

2020 ◽  
pp. 028418512092456
Author(s):  
Jingjing Liu ◽  
Hang Jin ◽  
Yinyin Chen ◽  
Caixia Fu ◽  
Caizhong Chen ◽  
...  
Keyword(s):  
Image Quality ◽  
Spin Echo ◽  
Free Breathing ◽  
Fat Suppression ◽  
Breath Hold ◽  
Signal Loss ◽  
Turbo Spin Echo ◽  
Turbo Spin ◽  
Imaging Sequence ◽  
Ghosting Artifacts

Background Cardiac magnetic resonance (MR) has become an essential diagnostic imaging modality in cardiovascular disease. However, the insufficient image quality of traditional breath-hold (BH) T2-weighted (T2W) imaging may compromise its diagnostic accuracy. Purpose To assess the efficacy of the BLADE technique to reduce motion artifacts and improve the image quality. Material and Methods Free-breathing TSE-T2W imaging sequence with cartesian and BLADE k-space trajectory were acquired in 20 patients. Thirty patients underwent conventional BH turbo spin-echo (TSE) T2W imaging and free-breathing BLADE T2W (FB BLADE-T2W) imaging. Twenty-one patients who had a signal loss of myocardium in BH short-axis T2W turbo inversion recovery (TSE-T2W-TIR) were scanned using free-breathing BLADE T2W turbo inversion recovery (BLADE TSE-T2W-TIR). The overall image quality, blood nulling, and visualization of the heart were scored on a 5-point Likert scale. The signal loss of myocardium, incomplete fat suppression near the myocardium, and the streaking or ghosting artifacts were noted in T2W-TIR sequences additionally. Results The overall imaging quality, blood nulling, and the visualization of heart structure of FB BLADE-T2W imaging sequence were significantly better than those of FB T2W imaging with Cartesian k-space trajectory and BH TSE-T2W imaging sequence ( P<0.01). The FB BLADE TSE-T2W-TIR reduces the myocardium signal dropout ( P<0.05), incomplete fat suppression near myocardium ( P<0.05), and the streaking and ghosting artifacts ( P<0.05) in comparison with the BH TSE-T2W-TIR. Conclusions FB BLADE T2W imaging provides improved myocardial visibility, less motion sensitivity, and better image quality. It may be applied in patients who have poor breath-holding capability.

Abstract 4686: Noncontrast Three Dimensional Dark Blood Magnetic Resonance Imaging in Adult Congenital Heart Disease Patients After Transcatheter Intervention

Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Marshall W Winner ◽  
Subha V Raman ◽  
Orlando P Simonetti ◽  
Yiu-Cho Chung ◽  
Lindsay Arnott ◽  
...  
Keyword(s):  
Congenital Heart Disease ◽  
Heart Disease ◽  
Radiation Dose ◽  
Congenital Heart ◽  
Spin Echo ◽  
Adult Congenital Heart Disease ◽  
Continuous Variables ◽  
Dark Blood ◽  
Complex Anatomy ◽  
Stent Stenosis

Background : Adults with congenital heart disease (ACHD) often require transcatheter therapies as a result of residual lesions. CT is well-suited for evaluation of stents but exposes young adults to radiation. Gradient echo MRI suffers from artifact limiting assessment of stented segments. We investigate the use of a novel 3D turbo spin echo (TSE) MRI sequence in these patients. Methods: ACHD patients presenting for MRI with prior interventions underwent an additional T1-weighted 3D dark blood navigator respiratory gated TSE scan on a1.5 Tesla system. Type of CHD, prior CT, radiation dose, length of time between examinations, and luminal diameters on each study were obtained. Continuous variables analyzed using Student’s t-test and Bland-Altman plots. Results: Eleven patients underwent both MRI and CT. Diagnoses were coarctation of the aorta (n=6) and tetralogy of Fallot (n=5) with intervention in the aorta or pulmonary arteries respectively. Average radiation dose was 19.57mSv; average time between CT and MRI was 99 ± 160 days. Luminal diameters of stented vessels correlated closely between TSE MRI and CT (r 2 = .85) with a small bias toward overestimation with MRI (mean 22.4 +/− 4.3 mm and 20.9 +/− 3.7 mm, p< .01). There were no cases of in-stent stenosis demonstrated by CT. Conclusion: Metallic artifact is significantly reduced with 3D navigator respiratory gated TSE MRI allowing visualization of anatomy in the vicinity of stents, providing a potential method for assessment of complex anatomy without radiation exposure or use of contrast agents. Further studies of this technique are warranted, particularly in patients with in-stent stenosis.

Comparison of Non-Breath-Hold T2-weighted Turbo Spin-Echo and Three Breath-Hold T2-weighted MR Images for Detection of Focal Hepatic Lesion

1999 ◽  
Vol 41 (4) ◽  
pp. 731
Author(s):  
Dal Mo Yang ◽  
Myung Hwan Yoon ◽  
Hak Soo Kim ◽  
Hyung Sik Kim ◽  
Hyug Chung Kim ◽  
...  
Keyword(s):  
Spin Echo ◽  
Hepatic Lesion ◽  
Breath Hold ◽  
Turbo Spin Echo ◽  
Mr Images ◽  
Turbo Spin ◽  
Focal Hepatic Lesion

Fast T2-weighted liver MR imaging: comparison among breath-hold turbo-spin-echo, HASTE, and inversion recovery (IR) HASTE sequences

2000 ◽  
Vol 25 (1) ◽  
pp. 93-99 ◽  
Author(s):  
M.-G. Lee ◽  
Y. K. Jeong ◽  
J. C. Kim ◽  
E. M. Kang ◽  
P. N. Kim ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Spin Echo ◽  
Inversion Recovery ◽  
Breath Hold ◽  
Turbo Spin Echo ◽  
Turbo Spin ◽  
And Inversion

scholarly journals Evaluation of a single-breath-hold radial turbo-spin-echo sequence for T2 mapping of the liver at 3T

2021 ◽  
Author(s):  
Diana Bencikova ◽  
Fei Han ◽  
Stephan Kannengieser ◽  
Marcus Raudner ◽  
Sarah Poetter-Lang ◽  
...  
Keyword(s):  
Spin Echo ◽  
T2 Mapping ◽  
Fat Suppression ◽  
Breath Hold ◽  
Turbo Spin Echo ◽  
Turbo Spin ◽  
Single Breath ◽  
Single Breath Hold ◽  
Spin Echo Sequence ◽  
Phantom Measurements

Abstract Objectives T2 mapping of the liver is a potential diagnostic tool, but conventional techniques are difficult to perform in clinical practice due to long scan time. We aimed to evaluate the accuracy of a prototype radial turbo-spin-echo (rTSE) sequence, optimized for multi-slice T2 mapping in the abdomen during one breath-hold at 3 T. Methods A multi-sample (fat: 0–35%) agarose phantom doped with MnCl2 and 80 subjects (73 patients undergoing abdomen MR examination and 7 healthy volunteers) were investigated. A radial turbo-spin-echo (rTSE) sequence with and without fat suppression, a Cartesian turbo-spin-echo (Cart-TSE) sequence, and a single-voxel multi-echo STEAM spectroscopy (HISTO) were performed in phantom, and fat-suppressed rTSE and HISTO sequences were performed in in vivo measurements. Two approaches were used to sample T2 values: manually selected circular ROIs and whole liver analysis with Gaussian mixture models (GMM). Results The rTSE-T2s values exhibited a strong correlation with Cart-TSE-T2s (R2 = 0.988) and with HISTO-T2s of water (R2 = 0.972) in phantom with an offset between rTSE and Cart-TSE maps (mean difference = 3.17 ± 1.18 ms). The application of fat suppression decreased T2 values, and the effect was directly proportional to the amount of fat. Measurements in patients yielded a linear relationship between rTSE- and HISTO-T2s (R2 = 0.546 and R2 = 0.580 for ROI and GMM, respectively). Conclusion The fat-suppressed rTSE sequence allows for fast and accurate determination of T2 values of the liver, and appears to be suitable for further large cohort studies. Key Points •Radial turbo-spin-echo T2 mapping performs comparably to Cartesian TSE-T2 mapping, but an offset in values is observed in phantom measurements. •Fat-suppressed radial turbo-spin-echo T2 mapping is consistent with T2 of water as assessed by MRS in phantom measurements. •Fat-suppressed radial turbo-spin-echo sequence allows fast T2 mapping of the liver in a single breath-hold and is correlated with MRS-based T2 of water.

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