Fetal Anomalies: Comparison of MR Imaging and US for Diagnosis

Frates, Mary C.; Kumar, Ada J.; Benson, Carol B.; Ward, Valerie L.; Tempany, Clare M.

doi:10.1148/radiol.2322030504

Cited by 149 publications

(105 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…MRI provides superior soft tissue contrast resolution and the ability to distinguish individual structures such as brain, lung, liver, kidney, and bowel. MRI provides multiplanar imaging as well as a large field of view, facilitating examination of fetuses with large or complex anomalies, and visualization of the lesion within the context of the entire body of the fetus (Frates et al, 2004).…”

Section: Fetal Mri: General Indicationsmentioning

confidence: 99%

“…Role of CMR includes anatomic and functional assessment of the cardiovascular system (Finn et al, 2006). Fetal MRI proved valuable in defining the details of fetal anatomy especially the central nervous system (Frates et al, 2004;Levine, 2006;Saleem et al, 2009) and potentially the heart (Gorincour et al, 2007;Saleem, 2008). However, CMR has not been thoroughly investigated in-utero.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fetal Cardiac Magnetic Resonance (CMR)

Saleem¹

2012

Echocardiography - New Techniques

View full text Add to dashboard Cite

Section: Fetal Mri: General Indicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fetal Cardiac Magnetic Resonance (CMR)

Saleem¹

2012

Echocardiography - New Techniques

View full text Add to dashboard Cite

“…It offers high-resolution fetal images with excellent contrast that allow visualization of internal tissues Jani et al, 2007;Daltro et al, 2008). When ultrasound yields equivocal results, MRI is generally used, because it provides additional information about fetal abnormalities and conditions in situations where ultrasound cannot provide high-quality images (Frates et al, 2004;Prayer et al, 2006). CT is used only in specific cases of suspected fetal malformation, particularly those related to the skeleton, because of potential risks associated with radiation exposure to the fetus.…”

Section: Imaging Scanning Technologies Carried Out In Pregnancymentioning

confidence: 99%

Additive Manufactured Models of Fetuses Built from 3D Ultrasound, Magnetic Resonance Imaging and Computed Tomography Scan Data

Santos¹,

Werner²,

Fontes³

et al. 2011

Rapid Prototyping Technology - Principles and Functional Requirements

View full text Add to dashboard Cite

“…Numerous studies have shown that MR imaging provides complementary information to sonography scans of the fetal brain. [10][11][12] All these potential applications herald further demand for neonatal and fetal brain MR imaging, making motion compensation in the MR imaging of this population a priority.…”

Section: Introduction and Scopementioning

confidence: 99%

Motion-Compensation Techniques in Neonatal and Fetal MR Imaging

Malamateniou

Malik

Counsell

et al. 2012

AJNR Am J Neuroradiol

111

View full text Add to dashboard Cite

SUMMARY:Fetal and neonatal MR imaging is increasingly used as a complementary diagnostic tool to sonography. MR imaging is an ideal technique for imaging fetuses and neonates because of the absence of ionizing radiation, the superior contrast of soft tissues compared with sonography, the availability of different contrast options, and the increased FOV. Motion in the normally mobile fetus and the unsettled, sleeping, or sedated neonate during a long acquisition will decrease image quality in the form of motion artifacts, hamper image interpretation, and often necessitate a repeat MR imaging to establish a diagnosis. This article reviews current techniques of motion compensation in fetal and neonatal MR imaging, including the following: 1) motion-prevention strategies (such as adequate patient preparation, patient coaching, and sedation, when required), 2) motion-artifacts minimization methods (such as fast imaging protocols, data undersampling, and motion-resistant sequences), and 3) motion-detection/correction schemes (such as navigators and self-navigated sequences, external motion-tracking devices, and postprocessing approaches) and their application in fetal and neonatal brain MR imaging. Additionally some background on the repertoire of motion of the fetal and neonatal patient and the resulting artifacts will be presented, as well as insights into future developments and emerging techniques of motion compensation.ABBREVIATIONS: bFFE ϭ balanced fast-field echo; FLASH ϭ fast low-angle shot; G RO ϭ readout gradient; NSA ϭ number of signal averages; PROPELLER ϭ periodically rotated overlapping parallel lines with enhanced reconstruction; RF ϭ radio-frequency M R imaging is an ideal diagnostic technique for the evaluation of infants and fetuses 1-7 because of the absence of ionizing radiation, the superior contrast of soft tissues compared with sonography, and the availability of different contrast options (T1-weighted, T2-weighted, and diffusion-weighted imaging, Fig 1) to improve characterization of both anatomy and pathology. However MR imaging remains a relatively slow technique, with scanning times for most applications in the order of seconds to minutes, leaving them susceptible to motion artifacts. The normally mobile fetus and the unsettled neonate present a major difficulty because the presence of motion during a long acquisition will decrease image quality in the form of motion artifacts (Fig 2), hamper accurate image interpretation, and often necessitate a repeat MR imaging to establish a diagnosis. This may have major emotional implications for parents and can stress the tight budgets of health care providers.

show abstract

Fetal Anomalies: Comparison of MR Imaging and US for Diagnosis

Abstract: MR imaging may have a place as an adjunct to US in evaluation of fetal anomalies, particularly those involving the central nervous system.

Cited by 149 publications

References 32 publications

Fetal Cardiac Magnetic Resonance (CMR)

Fetal Cardiac Magnetic Resonance (CMR)

Additive Manufactured Models of Fetuses Built from 3D Ultrasound, Magnetic Resonance Imaging and Computed Tomography Scan Data

Motion-Compensation Techniques in Neonatal and Fetal MR Imaging

Contact Info

Product

Resources

About