Practical applications of balanced steady-state free-precession (bSSFP) imaging in the abdomen and pelvis

Schieda, Nicola; Isupov, Inga; Chung, Andrew D.; Coffey, Niamh; Avruch, Leonard

doi:10.1002/jmri.25336

Cited by 22 publications

(12 citation statements)

References 23 publications

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“…[1][2][3] One of the characteristics of bSSFP technique is its generally mixed T 2 /T 1 -weighted contrast offering a bright fluid signal in comparison to the incoherent SSFP pulse sequences, 3 as well as, the highest SNR per unit of time among all MRI sequences. 4 The technique has found its application in different fields where rapid data acquisition is needed (e.g., cardiac imaging, 5-7 thoracic imaging, [8][9][10] abdominal imaging, 11 relaxometry, [12][13][14] or noncontrast-enhanced angiography 15,16 ).…”

Section: Introductionmentioning

confidence: 99%

Balanced steady‐state free precession thoracic imaging with half‐radial dual‐echo readout on smoothly interleaved archimedean spirals

Bauman

Bieri

2019

Magnetic Resonance in Med

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Purpose To investigate the prospects of a minimal‐TR half‐radial dual‐echo balanced steady‐state free precession (bSSFP) acquisition for high‐resolution and artifact‐free thoracic imaging at 1.5T. Methods Feasibility of bSSFP imaging using isotropic half‐radial dual‐echo (hr‐de) projections with TE1/TE2/TR of 0.12/1.18/1.39 ms acquired along Archimedean spiral trajectories was demonstrated for phantoms and in vivo thorax scans at 1.5T. The centered‐out projection offers an ultra‐short echo (UTE) comparable to contemporary spoiled gradient echo (SPGR) UTE radial acquisitions used for the assessment of chest morphology. Signal intensities of hr‐de‐bSSFP were measured and compared to UTE‐SPGR in a phantom and for parenchyma and blood in vivo and compared to theory. Results For the lung parenchyma and the blood, hr‐de‐bSSFP provided more than 4 times higher signal intensity than contemporary UTE‐SPGR imaging. The measured hr‐de‐bSSFP and UTE‐SPGR signal ratios were in the agreement with theoretically simulated values. Overall, the very short TR of hr‐de‐bSSFP successfully mitigated off‐resonance artifacts offering high‐quality breath‐hold thoracic imaging at isotropic resolution of 1.7 mm. The application of a smooth interleaved spiral trajectory for half‐radial readouts improved the robustness of hr‐de‐bSSFP to cardiac motion. Conclusion Thoracic hr‐de‐bSSFP offers artifact‐free chest images with considerably improved signal intensity as compared to contemporary UTE‐SPGR imaging at 1.5T.

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Section: Introductionmentioning

confidence: 99%

Balanced steady‐state free precession thoracic imaging with half‐radial dual‐echo readout on smoothly interleaved archimedean spirals

Bauman

Bieri

2019

Magnetic Resonance in Med

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“…; Schieda et al. ). Although computed tomography (CT) can provide high spatial resolution, it also exposes the patient to radiation and is therefore unsuitable for repeated scans.…”

Section: Discussionmentioning

confidence: 98%

“…By contrast, we used a balanced turbo field echo sequence in this study to visualise not only the thoracic duct, but also its surrounding structures, thus enabling an understanding of the anatomical relationships therein (Kato et al 2011). In addition, a balanced turbo field echo sequence offers several advantages, such as a high signal-to-noise ratio, high spatial resolution and rapid acquisition time (Amano et al 2017;Schieda et al 2017). Although computed tomography (CT) can provide high spatial resolution, it also exposes the patient to radiation and is therefore unsuitable for repeated scans.…”

Section: Discussionmentioning

confidence: 99%

Magnetic resonance thoracic ductography assessment of serial changes in the thoracic duct after the intake of a fatty meal

et al. 2017

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The thoracic duct, a terminal lymph vessel, is thought to dilate after the intake of a fatty meal. However, this physiological change has not been well explored in vivo. Therefore, the present study aimed to assess serial changes in the thoracic duct after the intake of a fatty meal using magnetic resonance thoracic ductography (MRTD). Eight healthy volunteers were subjected to one MRTD scan before a fatty meal and eight serial MRTD scans every hour thereafter. The cross‐sectional areas of the thoracic duct were estimated using MRTD measurements of the diameters of the thoracic duct at the upper edge of the aortic arch, the tracheal bifurcation, the mid‐point between the tracheal bifurcation and the left part of the diaphragm and the left part of the diaphragm. The change‐rates in these areas were calculated before and after the fatty meal intake, and the maximal change‐rate and timing of its achievement were determined for each subject. The summed change‐rates in the four portions of the thoracic duct ranged from −40.1 to 81.3%, with maximal change‐rates for each subject ranging from 22.8 to 81.3% (mean, 50.4%). Although individual variations were observed, most subjects (88.9%) exhibited a maximal change‐rate at 4–6 h after meal intake, with subsequent decreases at 7–8 h. In conclusion, MRTD revealed a tendency toward thoracic duct enlargement at 4–6 h after the intake of a fatty meal, followed by contraction.

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“…This finding was best depicted on the balanced steady-state gradient echo sequence, in which vessels show high intensity. Although the usefulness of this sequence in the abdomen and pelvis has been described [10], its utility in acute abdominal pain in pregnant women has not previously been reported. Further study is required to confirm the association of this finding with ovarian torsion.…”

Section: Discussionmentioning

confidence: 99%

A case of torsion of a normal ovary in the third trimester of pregnancy: MRI findings with emphasis on asymmetry in the diameter of the ovarian veins

Tanaka

Tsuboyama

Yamamoto

et al. 2019

Radiology Case Reports

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A 33-year-old woman, gravida two para one, at 31 weeks of gestational age experienced sudden onset of left lower quadrant pain and underwent unenhanced pelvic MRI. On fast imaging employing steady state precession (FIESTA) sequence images, a marked difference was observed in the diameters of the right and left ovarian veins. The right ovarian vein was torturous and dilated, measuring 35 mm in diameter, while the left ovarian vein was thin and linear, measuring 7 mm in diameter. The left ovary showed no apparent swelling or hemorrhage, but was suspected to have been shifted anteriorly. The patient underwent explorative laparotomy and was found to have left ovarian torsion. A difference in diameter of the ovarian veins, with thinning of the twisted side and compensatory dilatation of the contralateral side for drainage of increased uterine blood flow, may be a useful imaging sign for the diagnosis of ovarian torsion during pregnancy.

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Practical applications of balanced steady-state free-precession (bSSFP) imaging in the abdomen and pelvis

Abstract: 5 J. Magn. Reson. Imaging 2017;45:11-20.

Cited by 22 publications

References 23 publications

Balanced steady‐state free precession thoracic imaging with half‐radial dual‐echo readout on smoothly interleaved archimedean spirals

Balanced steady‐state free precession thoracic imaging with half‐radial dual‐echo readout on smoothly interleaved archimedean spirals

Magnetic resonance thoracic ductography assessment of serial changes in the thoracic duct after the intake of a fatty meal

A case of torsion of a normal ovary in the third trimester of pregnancy: MRI findings with emphasis on asymmetry in the diameter of the ovarian veins

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