T2-weighted MRI of the Upper Abdomen:

Bayramoğlu, Sibel; Kılıçkesmez, Özgür; Cimilli, Tan; Kayhan, Arda; Yirik, Gülseren; İslim, Filiz; Alibek, Sedat

doi:10.1016/j.acra.2009.10.015

Cited by 42 publications

(22 citation statements)

References 30 publications

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“…[5,13] Bayramoglu et al and Hirokawa et al reported that PROPELLER was an effective approach to improve breathing motion artifacts for better image quality in T2W-MRI of the upper abdomen. [3,8] Other studies showed that the method also improved the anatomical imaging (T1W or/and T2W) of cardiac, lungs, and head and neck by motion reduction. [6,9,12,14] Our study is the first to report that the severity of respiration and peristalsis induced artifacts on bladder imaging can be compensated by using PROPELLER, which appears to be a valuable tool to ensure consistent diagnostic image quality.…”

Section: Discussionmentioning

confidence: 99%

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Periodically rotated overlapping parallel lines with enhanced reconstruction acquisition to improve motion-induced artifacts in bladder cancer imaging

Nguyen¹,

Shah²,

Mortazavi³

et al. 2019

Medicine

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Motion-induced artifacts have been a major drawback in bladder cancer imaging. This study is to evaluate the clinical utility of periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) acquisition in improving motion-induced artifacts in T2-weighted (T2W) magnetic resonance imaging (MRI) of bladder cancer at 3T.Sixteen patient MRI exams were included. Using a Likert scale, 2 radiologists independently scored T2W data without and with PROPELLER in terms of artifact severity and tumor visualization. Statistical analysis was done to assess the image quality improvement by PROPELLER and inter-observer variability.Without PROPELLER, the median scores of artifact severity and tumor visualization were 1.5 and 1.5 for reviewer 1, and 2.0 and 2.0 for reviewer 2. With PROPELLER, the scores increased to 3 and 3.5 for reviewer 1, and 3.5 and 3.5 for reviewer 2. Despite the inter-observer variability (κ scores < 0.2), both reviewers found significant improvement in artifacts and visualization (all P < .001).PROPELLER acquisition significantly improved the image quality of T2W-MRI. These initial findings indicate that this technique should be utilized in clinical MRI of the bladder.

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Section: Discussionmentioning

confidence: 99%

“…PROPELLER acquisition has been shown to substantially improve or eliminate motion artifacts for a number of clinical applications including brain, shoulder, upper abdomen, and cardiac imaging. [3–17] To date, there has been no reported data about the value of PROPELLER in bladder cancer imaging.…”

Section: Introductionmentioning

confidence: 99%

Periodically rotated overlapping parallel lines with enhanced reconstruction acquisition to improve motion-induced artifacts in bladder cancer imaging

Nguyen¹,

Shah²,

Mortazavi³

et al. 2019

Medicine

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“…However, to maintain clinically desirable TE eff , the ETL needed to be reduced, which in turn prompted a reduction in resolution to acquire the images in clinically feasible scan times. Compared to breath-hold 2D T 2 -weighted imaging techniques with fat suppression (32), 3D-FSE-IDEAL in its current implementation may have limitations in general body imaging. Future implementations with navigator based triggering (33) may improve the reliability of this technique compared to respiratory triggering in body applications.…”

Section: Discussionmentioning

confidence: 99%

T₂‐weighted 3D fast spin echo imaging with water–fat separation in a single acquisition

Madhuranthakam¹,

Shimakawa

et al. 2010

Magnetic Resonance Imaging

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Purpose To develop a robust 3D fast spin echo (FSE) T2-weighted imaging method with uniform water and fat separation in a single acquisition, amenable to high-quality multiplanar reformations. Materials and Methods The Iterative Decomposition of water and fat with Echo Asymmetry and Least squares estimation (IDEAL) method was integrated with modulated refocusing flip angle 3D-FSE. Echoes required for IDEAL processing were acquired by shifting the readout gradient with respect to the Carr-Purcell-Meiboom-Gill echo. To reduce the scan time, an alternative data acquisition using two gradient echoes per repetition was implemented. Using the latter approach, a total of four gradient echoes were acquired in two repetitions and used in the modified IDEAL reconstruction. Results 3D-FSE T2-weighted images with uniform water–fat separation were successfully acquired in various anatomies including breast, abdomen, knee, and ankle in clinically feasible scan times, ranging from 5:30–8:30 minutes. Using water-only and fat-only images, in-phase and out-of-phase images were reconstructed. Conclusion 3D-FSE-IDEAL provides volumetric T2-weighted images with uniform water and fat separation in a single acquisition. High-resolution images with multiple contrasts can be reformatted to any orientation from a single acquisition. This could potentially replace 2D-FSE acquisitions with and without fat suppression and in multiple planes, thus improving overall imaging efficiency.

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“…In this technique, navigator echoes are used to monitor respiratory motion instead of a respiratory belt. The patient does not need to be particularly prepared (16). Therefore, the aim of the present study was to evaluate the efficiency of the BLADE technique combined with PACE in reducing artifacts and improving image quality for cardiac T2W imaging.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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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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T2-weighted MRI of the Upper Abdomen:

Cited by 42 publications

References 30 publications

Periodically rotated overlapping parallel lines with enhanced reconstruction acquisition to improve motion-induced artifacts in bladder cancer imaging

Periodically rotated overlapping parallel lines with enhanced reconstruction acquisition to improve motion-induced artifacts in bladder cancer imaging

T₂‐weighted 3D fast spin echo imaging with water–fat separation in a single acquisition

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

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T2-weighted MRI of the Upper Abdomen:

Cited by 42 publications

References 30 publications

Periodically rotated overlapping parallel lines with enhanced reconstruction acquisition to improve motion-induced artifacts in bladder cancer imaging

Periodically rotated overlapping parallel lines with enhanced reconstruction acquisition to improve motion-induced artifacts in bladder cancer imaging

T2‐weighted 3D fast spin echo imaging with water–fat separation in a single acquisition

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

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T₂‐weighted 3D fast spin echo imaging with water–fat separation in a single acquisition