New fetal cardiac imaging techniques

Deng, Jing; Rodeck, Charles H.

doi:10.1002/pd.1066

Cited by 43 publications

(37 citation statements)

References 79 publications

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“…Since cardiac chambers do not lend themselves to geometric assumptions, it has always been difficult to calculate them, even though studies have shown that 3D US has a better reproducibility than 2D [7][8][9][10]. To be able to do so, one must trace the volume manually because of various ultrasound specific artefacts, such as speckles and acoustic shadowing, which would appear when done automatically [11,12]. MR imaging of the fetal heart might provide some additional information in some cases with complex cardiac anomalies.…”

Section: Introductionmentioning

confidence: 98%

Self-gating MR imaging of the fetal heart: comparison with real cardiac triggering

et al. 2010

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Section: Introductionmentioning

confidence: 98%

Self-gating MR imaging of the fetal heart: comparison with real cardiac triggering

et al. 2010

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“…Because cardiac chambers do not lend themselves to geometric assumptions, it has always been difficult to calculate their dimensions, even though studies have shown that 3D US has a better reproducibility than 2D (1)(2)(3)(4). To be able to do so, it is necessary to trace the volume of the cardiac chambers manually, due to the appearance of various US specific artifacts, such as speckles and acoustic shadowing, which appear when traced automatically (5,6). A new freehand ultrasound system that allows 3D reconstructions from sparse sampling geometries and multiple views is also introduced in a recent study (7), but still has to be investigated further.…”

mentioning

confidence: 99%

Cardiac MRI of the fetal heart using a novel triggering method: Initial results in an animal model

Yamamura

Kopp

Frisch

et al. 2012

Magnetic Resonance Imaging

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Purpose: To investigate MRI of the fetal heart by way of a novel triggering method with the use of an MR-compatible cardiotocography (CTG) in an animal model. Materials and Methods:Fetal cardiac MRI was performed on four pregnant ewes on a 1.5 Tesla (T) MR system. A CTG was rendered MR compatible and its signal was used for the triggering of the fetal heart to perform cardiac cine MRI of the fetal heart with maternal freebreathing with cine steady-state free precession. The left ventricular volume and function were measured from the short-axis (view). The image quality of anatomical structures was assessed.Results: All cardiac valves and the foramen ovale could be visualized. Myocardial contraction was depicted in cine sequences. The average blood volume at the end systole was 1.7 mL (SD 6 0.12). The average volume at the end diastole was 4.6 mL (6 0.4); thus the average stroke volumes of the left ventricle were 2.87 mL (6 0.31) with ejection fractions of 60.53% (6 4.17). Conclusion:The newly developed MR compatible CTG could be used as a tool for cardiac triggering method of the fetal heart. This novel device might help fetal cardiac MRI technology in the future. THE RAPID DEVELOPMENT of cardiac MR imaging in the past few years has enabled many different investigations, for example investigations into coronary arteries and myocardial infarctions. In practice, twodimensional (2D) CINE steady-state free precession (SSFP) imaging is the most reliable and frequently used technique for left ventricular (LV) function assessment. To assess the LV function correctly, speed as well as synchronization of data acquisition with the cardiac cycle are required, so that artifacts due to cardiac motion and flow constraints that dictate the viable window for data acquisition are avoided. To avoid the artifacts caused by cardiac motion, it is customary that either finger pulse oximetry or electrocardiography (ECG) triggering/gating techniques are used so that data acquisition can be synchronized with the cardiac cycle.Although the use of MR imaging during pregnancy is limited to the second and third trimester, its diagnostic value has been increasing in recent years. In the field of fetal MR imaging, the evaluation of the fetal heart is one of the greatest challenges. Nowadays, the gold standard in fetal cardiac imaging is the use of ultrasound (US), because it can be obtained during the entire pregnancy; it is easy to use and thus more practicable. Both the measurement of the cardiac volume and the evaluation of volumetric changes with US are possible, and the technology has been improving. Because cardiac chambers do not lend themselves to geometric assumptions, it has always been difficult to calculate their dimensions, even though studies have shown that 3D US has a better reproducibility than 2D (1-4). To be able to do so, it is necessary to trace the volume of the cardiac chambers manually, due to the appearance of various US specific artifacts, such as speckles and acoustic shadowing, which appear when traced automaticall...

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“…There have been few reports on B-flow imaging of the umbilical cord and fetal cardiac imaging. [4][5][6][7][8] However, for potential users of this technique, the question is whether the images alone add new information.9 …”

mentioning

confidence: 99%

Four‐dimensional sonography with B‐flow imaging and spatiotemporal image correlation for visualization of the fetal heart

Hata

Dai

Inubashiri

et al. 2008

J of Clinical Ultrasound

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New fetal cardiac imaging techniques

Cited by 43 publications

References 79 publications

Self-gating MR imaging of the fetal heart: comparison with real cardiac triggering

Self-gating MR imaging of the fetal heart: comparison with real cardiac triggering

Cardiac MRI of the fetal heart using a novel triggering method: Initial results in an animal model

Four‐dimensional sonography with B‐flow imaging and spatiotemporal image correlation for visualization of the fetal heart

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