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

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.

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Small hepatic lesions found on single-phase helical CT in patients with malignancy: Diagnostic capability of breath-hold, multisection fluid-attenuated inversion-recovery (FLAIR) MR imaging using a half-fourier acquisition single-shot turbo spin-echo (HASTE) sequence

Journal of Magnetic Resonance Imaging ◽

10.1002/jmri.20797 ◽

2007 ◽

Vol 25 (1) ◽

pp. 129-136 ◽

Cited By ~ 6

Author(s):

Katsumi Sasaki ◽

Katsuyoshi Ito ◽

Takeshi Fujita ◽

Ayame Shimizu ◽

Masayasu Yasui ◽

...

Keyword(s):

Single Phase ◽

Spin Echo ◽

Helical Ct ◽

Breath Hold ◽

Single Shot ◽

Turbo Spin Echo ◽

Turbo Spin ◽

Diagnostic Capability ◽

Fluid Attenuated Inversion Recovery ◽

Hepatic Lesions

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

Circulation ◽

10.1161/circ.118.suppl_18.s_930-a ◽

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.

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