Computer-assisted imaging of the fetus with magnetic resonance imaging

Colletti, Patrick M.

doi:10.1016/s0895-6111(96)00045-6

Cited by 7 publications

(2 citation statements)

References 37 publications

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“…The kidneys were more difficult to recognize and evaluate. Also from other studies it is known that US is often better to detect anomalies of the kidneys than MRI [1,15,19].…”

Section: Discussionmentioning

confidence: 96%

Ultrafast Scan Magnetic Resonance in Prenatal Diagnosis

Wagenvoort¹,

Bekker²,

Go³

et al. 2000

Fetal Diagn Ther

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Objective: To determine whether magnetic resonance (MR) can give additional information in prenatal diagnosis of congenital anomalies, when the ultrasound (US) analysis is not conclusive. Methods: Ultrafast MR scanning examined 39 pregnant women with 41 fetuses in whom US was suspicious of fetal congenital abnormalities. Two techniques were used namely (1) HASTE inversion recovery sequence and (2) FISP 2D. Results: Thirty-nine patients with 41 fetuses were referred for MR because of an equivocal US with regard to brain, spine, skeletal and miscellaneous anomalies. In 1 twin pregnancy, 1 co-twin has not been examined with MRI because of its demise. In 22 of them, additional information was obtained by MR. In 9 the MR was confirmative with the US examination. Four were false negative, comparing with the postnatal diagnosis. Three failed because of maternal claustrophobia and in 2 a diagnosis could not be made. From the 40 fetuses in this study, 38 were examined postnatally by MR, US, plain X-ray or autopsy was performed to confirm the prenatal diagnosis. Conclusion: The use of MRI in obstetrics has been limited, until recently. With fast MRI sequences it is not necessary to sedate the fetus. It is advisable in cases where US is equivocal concerning congenital anomalies of the fetus to use MR with fast or ultrafast scan technique, especially when the central nervous system is concerned.

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“…The kidneys were more difficult to recognize and evaluate. Also from other studies it is known that US is often better to detect anomalies of the kidneys than MRI [1,15,19].…”

Section: Discussionmentioning

confidence: 96%

Ultrafast Scan Magnetic Resonance in Prenatal Diagnosis

Wagenvoort¹,

Bekker²,

Go³

et al. 2000

Fetal Diagn Ther

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“…Previous use of T1 weighted MRI with an SPGR sequence has been used to produce an automatic atlas based volume estimation of brain regions,32 as well as to produce measurements of frontal lobes,33 cerebellum,34 and hippocampus/temporal lobes 35. SPGR MRI has also been used to evaluate intracranial tumours,36 cerebrovascular signals of flow,37 and fetal structures 38…”

Section: Discussionmentioning

confidence: 99%

Depth of lesion model in children and adolescents with moderate to severe traumatic brain injury: use of SPGR MRI to predict severity and outcome

Grados

Slomine

Gerring

et al. 2001

Journal of Neurology, Neurosurgery &Amp; Psychiatry

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Objectives-The utility of a depth of lesion classification using an SPGR MRI sequence in children with moderate to severe traumatic brain injury (TBI) was examined. Clinical and depth of lesion classification measures of TBI severity were used to predict neurological and functional outcome after TBI. Methods-One hundred and six children, aged 4 to 19, with moderate to severe TBI admitted to a rehabilitation unit had an SPGR MRI sequence obtained 3 months afterTBI. Acquired images were analyzed for location, number, and size of lesions. The Glasgow coma scale (GCS) was the clinical indicator of severity. The deepest lesion present was used for depth of lesion classification. Speed of injury was inferred from the type of injury. The disability rating scale at the time of discharge from the rehabilitation unit (DRS1) and at 1 year follow up (DRS2) were functional outcome measures. Results-The depth of lesion classification was significantly correlated with GCS severity, number of lesions, and both functional measures, DRS1 and DRS2. This result was more robust for time 1, probably due to the greater number of psychosocial factors impacting on functioning at time 2. Lesion volume was not correlated with the depth of lesion model. In multivariate models, depth of lesion was most predictive of DRS1, whereas GCS was most predictive of DRS2. Conclusions-A depth of lesion classification of TBI severity may have clinical utility in predicting functional outcome in children and adolescents with moderate to severe TBI. (J Neurol Neurosurg Psychiatry 2001;70:350-358)

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A high-resolution MRI study of linear growth of the human fetal skull base

Jeffery

2002

Neuroradiology

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The skull base, otherwise referred to as the basicranium or cranial base, plays a key role in the process of skull development, providing both support for the brain and an architectural component of the craniofacial complex. Consequently, the fetal skull base has been the focus of numerous studies employing various methods, including sectioning, plain radiography and CT. This paper investigates high-resolution (hr) MRI as an alternative method for looking at and quantifying the fetal skull base. The evaluation tests two basic hypotheses drawn from previous studies. These suggest that the anterior segment of the midline skull base grows more rapidly than the posterior segment and that the width of the posterior cranial fossa increases disproportionately in relation to its length. I imaged 42 formalin preserved human fetuses from museum collections with hrMRI. The T2-weighted image voxels were significantly smaller than those acquired with conventional clinical MRI. Landmarks of the fetal skull base were identified on reformatted axial and sagittal images. Bivariate plots revealed that the growth rate of the anterior skull base is almost twice that of the posterior skull base and that increases in the width of the posterior cranial fossa exceed those in its length. These findings confirm those of previous investigations and show that hrMRI offers a way forward in noninvasive quantification of fetal morphology.

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Computer-assisted imaging of the fetus with magnetic resonance imaging

Cited by 7 publications

References 37 publications

Ultrafast Scan Magnetic Resonance in Prenatal Diagnosis

Ultrafast Scan Magnetic Resonance in Prenatal Diagnosis

Depth of lesion model in children and adolescents with moderate to severe traumatic brain injury: use of SPGR MRI to predict severity and outcome

A high-resolution MRI study of linear growth of the human fetal skull base

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