Abstract:
BACKGROUND:Abnormalities of the placenta affect 5-7% of pregnancies. Because disturbances in fetal growth are often preceded by dysfunction of the placenta or attenuation of its normal expansion, placental health warrants careful surveillance. There are limited normative data available for placental volume by MRI. OBJECTIVE:To determine normative ranges of placental volume by MRI throughout gestation. MATERIALS AND METHODS:In this cross-sectional retrospective analysis, we reviewed MRI examinations of pregnant females obtained between 2002 and 2017 at a single institution. We performed semi-automated segmentation of the placenta in images obtained in patients with no radiologic evidence of maternal or fetal pathology, using the Philips Intellispace Tumor Tracking Tool. RESULTS:Placental segmentation was performed in 112 women and had a high degree of interrater reliability (single-measure intraclass correlation coefficient =0.978 with 95% confidence interval [CI] 0.956, 0.989; P<0.001). Normative data on placental volume by MRI increased nonlinearly from 6 weeks to 39 weeks of gestation, with wider variability of placental volume at higher gestational age (GA). We fit placental volumetric data to a polynomial curve of third order described as placental volume = -0.02*GA3 + 1.6*GA2 - 13.3*GA + 8.3. Placental volume showed positive correlation with estimated fetal weight (P=0.03) and birth weight (P=0.05). CONCLUSION:This study provides normative placental volume by MRI from early first trimester to term gestation. Deviations in placental volume from normal might prove to be an imaging biomarker of adverse fetal health and neonatal outcome, and further studies are needed to more fully understand this metric. Assessment of placental volume should be considered in all routine fetal MRI examinations.
journal_name
Pediatr Radioljournal_title
Pediatric radiologyauthors
León RL,Li KT,Brown BPdoi
10.1007/s00247-018-4213-xsubject
Has Abstractpub_date
2018-12-01 00:00:00pages
1936-1944issue
13eissn
0301-0449issn
1432-1998pii
10.1007/s00247-018-4213-xjournal_volume
48pub_type
杂志文章abstract::Three-dimensional printing called rapid prototyping, a technology that is used to create physical models based on a 3-D computer representation, is now commercially available and can be created from CT or MRI datasets. This technical innovation paper reviews the specific requirements and steps necessary to apply biome...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/s00247-013-2788-9
更新日期:2014-02-01 00:00:00
abstract::Intussusception in the pediatric patient may have a varied clinical presentation depending on its location, presence of lead point, intermittent occurrence, or underlying systemic disease. Computed tomography (CT) may be used at times in the evaluation of children with complicated presentations. The purpose of this in...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/BF01403699
更新日期:1996-01-01 00:00:00
abstract::We report a rare example of catastrophic antiphospholipid syndrome (CAPS) in a young child. A 3-year-old girl with no previous medical history presented with extensive and recurrent thromboses. The diagnosis of CAPS was based on the occurrence of cardiopulmonary embolism in the child with a high titre of autoantibodie...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/s00247-006-0183-5
更新日期:2006-08-01 00:00:00
abstract::Multiple epiphyseal dysplasia (MED) is an osteochondrodysplasia characterized clinically by mild short stature and early-onset degenerative joint disease and radiographically by epiphyseal hypoplasia/dysplasia. MED is genetically heterogeneous, with autosomal dominant cases resulting from mutations in at least three g...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/s002470000362
更新日期:2001-01-01 00:00:00
abstract::Imaging pediatric elbow trauma in the acute setting remains diagnostically challenging given difficult patient positioning, multiple ossification centers of the pediatric elbow, overlapping structures, and complex joint anatomy. Digital tomosynthesis is a technique where the X-ray source travels across a limited arc a...
journal_title:Pediatric radiology
pub_type: 杂志文章,评审
doi:10.1007/s00247-019-04444-y
更新日期:2019-11-01 00:00:00
abstract::This paper is a comprehensive review of the Doppler waveform appearance of ureteric jets. Six jet waveform patterns have been identified: monophasic, biphasic, triphasic, polyphasic, square and continuous. Details of the physical properties of jet patterns and their changes under various physiological conditions are i...
journal_title:Pediatric radiology
pub_type: 杂志文章,评审
doi:10.1007/s00247-007-0433-1
更新日期:2007-05-01 00:00:00
abstract::Accurate diagnosis of non-accidental injury (NAI) can be reached in the majority of cases by careful appraisal of the social and family history, combined with painstaking clinical roentgenographic and other imaging evaluations. Careful review of the scientific literature clearly indicates that collagen analysis to exc...
journal_title:Pediatric radiology
pub_type: 杂志文章,评审
doi:10.1007/s002470050079
更新日期:1997-02-01 00:00:00
abstract:: ...
journal_title:Pediatric radiology
pub_type: 评论,信件
doi:10.1007/s00247-018-4234-5
更新日期:2019-01-01 00:00:00
abstract:BACKGROUND:Foreign body aspiration is common in children, especially those under 3 years of age. Chest radiography and CT are the main imaging modalities for the evaluation of these children. Management of children with suspected foreign body aspiration (SFBA) mainly depends on radiological findings. OBJECTIVE:To inve...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/s00247-006-0331-y
更新日期:2007-01-01 00:00:00
abstract::We review the physiological basis of diffusion-weighted imaging and discuss the implementation of diffusion-weighted imaging pulse sequences and the subsequent postprocessing to yield quantitative estimations of diffusion parameters. We also introduce the concept of directionality of "apparent" diffusion in vivo and t...
journal_title:Pediatric radiology
pub_type: 杂志文章,评审
doi:10.1007/s00247-007-0516-z
更新日期:2007-08-01 00:00:00
abstract::The objective of this study was to compare the quality of conventional and helical computed tomography (CT) images in children unable to breath-hold. Sixteen patients (age range 1.1-7.5 years) underwent both conventional and helical chest CT on a General Electric HiSpeed Advantage scanner at a mean study interval of 3...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/BF02021699
更新日期:1995-01-01 00:00:00
abstract::Rare earth filters are known to reduce radiation dose in radiological investigations. The present investigation used Er and Sm filters that were selected because of their chemical stability and ability to withstand prolonged exposure to the atmosphere. They were used in a comparison with a conventional aluminium filte...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/BF01601887
更新日期:1984-01-01 00:00:00
abstract:BACKGROUND:Fluoroscopy is an important, sometimes vital radiological procedure in paediatric patients with high variability in frequency and technique. OBJECTIVE:To obtain data on paediatric fluoroscopy practice in Europe using a simple questionnaire mailed to 191 children's hospitals. RESULTS:Eighty-eight radiology ...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/s002470100429
更新日期:2001-04-01 00:00:00
abstract::Abdominal angiography is an extremely valuable modality for the diagnosis of abdominal disease in infants and children. A practical guide to catheter selection, flow rates, and contrast dosage for abdominal angiography in the pediatric patient is presented. ...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/BF00988657
更新日期:1976-10-26 00:00:00
abstract::Langerhans cell histiocytosis of the head and neck is an uncommon histiocytic proliferative disorder that often clinically resembles an inflammatory process. A pseudoaneurysm of the external carotid artery was found by contrast-enhanced CT and confirmed by Doppler ultrasonography and angiography in a 9 year old girl w...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/BF02020220
更新日期:1993-01-01 00:00:00
abstract::Congenital cardiac malformations (CCM) are the commonest congenital anomalies. Using ultrasonography (US), the incidence of CCM in a selected group of fetuses and the impact of CCM on perinatal and postnatal care was evaluated. The indication for fetal echocardiography (F-ECHO) in 152 pregnancies was a positive family...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/BF02387894
更新日期:1989-01-01 00:00:00
abstract::The congenital subglottic hemangioma typically appears as an asymmetric subglottic narrowing or mass on frontal neck radiographs. Therefore, soft tissue neck radiography has been advocated as a definitive non-operative approach for diagnosing these lesions. However, we have noted similar asymmetric subglottic narrowin...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/BF02388997
更新日期:1988-01-01 00:00:00
abstract::Retirement can be defined as a new stage of an active lifestyle. It is a unique chapter in life that can be fun and rewarding, if steps are taken to plan the process. Key factors to take into consideration during this process are family, friends, finances, and professional interests. With proper planning, rather than ...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/s00247-009-1523-z
更新日期:2010-04-01 00:00:00
abstract::Technical and clinical aspects of esophageal transit scintigraphy in pediatric patients are reviewed via several illustrative cases that highlight its utility in evaluating primary and secondary esophageal motility disorders. ...
journal_title:Pediatric radiology
pub_type: 杂志文章,评审
doi:10.1007/s00247-018-4301-y
更新日期:2019-05-01 00:00:00
abstract:PURPOSE:To describe the CT features of complicated pleural tuberculosis in children and to define the use of CT in children with pleural tuberculosis. MATERIALS AND METHODS:The CT findings in 11 children with complicated pleural tuberculosis were retrospectively analysed. CT was performed to evaluate persistent pleura...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/s002470050561
更新日期:1999-03-01 00:00:00
abstract::Post-traumatic subperiosteal hematoma of the iliac bone may present insidiously without external evidence of bleeding or go undetected in the acute setting. In some cases, the patient may come to medical attention due to femoral nerve palsy rather than hip or groin pain. In this report, we describe a case of femoral n...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/s00247-016-3581-3
更新日期:2016-08-01 00:00:00
abstract::We report the US and MR appearances in a case of persistent Müllerian duct syndrome, a rare form of inherited male pseudohermaphroditism characterised by the presence of uterus and fallopian tubes in a normally virilised 46XY male. ...
journal_title:Pediatric radiology
pub_type: 杂志文章,评审
doi:10.1007/s002470050484
更新日期:1998-11-01 00:00:00
abstract::Developmental dysplasia of the hip (DDH) is an important but poorly defined entity, the natural history of which is incompletely understood. The term encompasses a disease spectrum ranging from a stable hip with a mildly dysplastic acetabulum to complete hip dislocation. Much controversy surrounds the diagnosis, imagi...
journal_title:Pediatric radiology
pub_type: 杂志文章,评审
doi:10.1007/s00247-012-2429-8
更新日期:2012-12-01 00:00:00
abstract::Acute lymphoblastic leukemia (ALL) is the most common of all childhood malignancies. Current remission rates approach 80%. Recurrent disease can present in a wide variety of ways. MR imaging plays a crucial role in the detection of disease relapse. Because other disorders can mimic recurrence of leukemia, it is import...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/s00247-003-1137-9
更新日期:2004-05-01 00:00:00
abstract::Pulmonary venous anomalies comprise a wide spectrum of anatomical variations and their clinical presentations may vary from the relatively benign single partial anomalous pulmonary venous connection (PAPVC) to the critical obstructed total anomalous pulmonary venous connection (TAPVC). We briefly review the common ano...
journal_title:Pediatric radiology
pub_type: 杂志文章,评审
doi:10.1007/s00247-014-3044-7
更新日期:2014-09-01 00:00:00
abstract:BACKGROUND:Typical flow velocity profiles in the extraparenchymal pulmonary veins (PVs) demonstrate two major antegrade flow waves: a biphasic systolic wave (S), with S1 and S2 peaks and a monophasic early diastolic wave (D). Flow reversal during atrial systole (A) is common. There is agreement that the forward diastol...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/s00247-011-2227-8
更新日期:2012-02-01 00:00:00
abstract::Primary non-Hodgkin's lymphoma of the skull base presenting with neuro-ophthalmologic abnormalities or cavernous sinus involvement is very rare in children. We have found only 13 reported cases of cavernous sinus involvement by lymphoma [1]. We report the case of the youngest child diagnosed with Burkitt's lymphoma of...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/BF01387317
更新日期:1996-01-01 00:00:00
abstract::We report neuroimaging findings of intracranial hemorrhage and cerebral edema in an infant with obtundation and seizures, initially suspected to be secondary to non-accidental trauma but finally attributed to hypernatremic dehydration. Neuroimaging findings due to hypernatremic dehydration have not been previously des...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/s002470050232
更新日期:1997-10-01 00:00:00
abstract::Kidney length (KL), renal area and renal parenchymal area were measured on i.v. urograms of 255 children without apparent kidney disease age 0 to 14 years. These parameters were compared with age, body height, body surface area and the distance between the 1st and 4th lumbar vertebral body. In addition, renal parenchy...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/BF01464310
更新日期:1980-04-01 00:00:00
abstract::We present a case of Sertoli-Leydig cell tumour of the ovary in a 14-year-old girl who presented with abdominal distension. Ultrasonography showed a multilocular cystic lesion filled with finely echogenic fluid. Contrast-enhanced CT demonstrated a huge multilocular cystic mass with thickened septa. At MR imaging, the ...
journal_title:Pediatric radiology
pub_type: 杂志文章
doi:10.1007/s00247-008-0868-z
更新日期:2008-08-01 00:00:00