Evaluation of anterior fontanel size and area in the newborn using CT images

Noorizadeh, Negar; Kazemi, Kamran; Grebe, Reinhard; Helfroush, Mohammad Sadegh; Wallois, Fabrice

doi:10.3233/ifs-151611

Cited by 4 publications

(6 citation statements)

References 12 publications

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“…The crania of the newborn and 1-year-old phantoms were modified according to the data of the fontanelle sizes and cranial suture widths presented in tables 1 and 2, respectively. The anterior fontanelle has a rhombus shape, the size of which indicates the average value of the rhombus diagonals (Noorizadeh et al 2015). The anterior fontanelle size for the newborn phantoms was taken from the data provided by Noorizadeh et al (2015), which are values measured using the CT images of 11 newborns at Amiens University Hospital in France, and that for the 1-year-old phantoms was determined from the data given in Duc and Largo (1986), which are the caliper-measured values for 111 infants at 12 months after birth at University Hospital Zurich in Switzerland.…”

Section: Construction Of Skeletal Systems Of Pediatric Mrcpsmentioning

confidence: 99%

“…The anterior fontanelle has a rhombus shape, the size of which indicates the average value of the rhombus diagonals (Noorizadeh et al 2015). The anterior fontanelle size for the newborn phantoms was taken from the data provided by Noorizadeh et al (2015), which are values measured using the CT images of 11 newborns at Amiens University Hospital in France, and that for the 1-year-old phantoms was determined from the data given in Duc and Largo (1986), which are the caliper-measured values for 111 infants at 12 months after birth at University Hospital Zurich in Switzerland. The posterior fontanelle, typically having a triangular shape, is generally closed 2-3 months after birth (Usman et al 2011), which was therefore defined only for the newborn phantoms.…”

Section: Construction Of Skeletal Systems Of Pediatric Mrcpsmentioning

confidence: 99%

“…In this development, most of the bones were produced by direct conversion of the voxel models into the mesh format, while the bones that are not properly represented in the pediatric VRCPs (e.g. cranium, spine, and hand/foot bones) were modified or remodeled by reference to the relevant scientific literature and measurement data (Taylor 1975, Faix 1982, Duc and Largo 1986, Devlieger et al 1991, Park et al 2005, Usman et al 2011, Li et al 2015, Noorizadeh et al 2015://dk.kisti.re.kr/). The developed bones were then adjusted to match reference masses inclusive of intra-tissue blood content.…”

Section: Introductionmentioning

confidence: 99%

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Development of skeletal systems for ICRP pediatric mesh-type reference computational phantoms

et al. 2021

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In 2016, the International Commission on Radiological Protection (ICRP) launched Task Group 103 (TG 103) for the explicit purpose of developing a new generation of adult and pediatric reference computational phantoms, named ‘mesh-type reference computational phantoms (MRCPs)’, that can overcome the limitations of voxel-type reference computational phantoms (VRCPs) of ICRP Publications 110 and 143 due to their finite voxel resolutions and the nature of voxel geometry. After completing the development of the adult MRCPs, TG 103 has started the development of pediatric MRCPs comprising 10 phantoms (male and female versions of the reference newborn, 1-year-old, 5-year-old, 10-year-old, and 15-year-old). As part of the TG 103 project, within the present study, the skeletal systems, one of the most important and complex organ systems of the body, were developed for each phantom age and sex. The developed skeletal systems, while closely preserving the original bone topology of the pediatric VRCPs, present substantial improvements in the anatomy of complex and/or small bones. In order to investigate the dosimetric impact of the developed skeletons, the average absorbed doses and the specific absorbed fractions for radiosensitive skeletal tissues (i.e. active marrow and bone endosteum) were computed for some selected external and internal exposure cases, which were then compared with those calculated with the skeletons of pediatric VRCPs. The comparison result showed that the dose values of the pediatric MRCPs were generally similar to those of the pediatric VRCPs for highly penetrating radiations (e.g. photons >200 keV); however, for weakly penetrating radiations (e.g. photons ⩽200 keV and electrons), significant differences up to a factor of 140 were observed.

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Section: Construction Of Skeletal Systems Of Pediatric Mrcpsmentioning

confidence: 99%

Section: Construction Of Skeletal Systems Of Pediatric Mrcpsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of skeletal systems for ICRP pediatric mesh-type reference computational phantoms

et al. 2021

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“…Ancak ön fontanelin bilgisayarlı tomografi (BT) görüntülerde ölçümü fizik muayeneye kıyasla daha objektif bulgular sağlar. 5,6 Toplumumuzda ön fontanel kapanması (ÖFK) veya ÖF boyutuna yönelik araştırmalar fontanel açıklığının fizik muayene ile değerlendirildiği süt çocuğu (infant) popülasyonunu içermekte olup, radyografik verilerin dahil edildiği bir çalışmaya rastlanmamıştır. 7 Bu çalışma ile, aylık yaş gruplarında ÖFK sıklığı ve ÖF yüzey alanı değerlerinin geniş bir infant grubunda BT ile değerlendirilmesi amaçlanmıştır.…”

Section: Introductionunclassified

Evaluation of Anterior Fontanelle Sizes and Closure Time in Children with Computed Tomography

Ciraci

Özdemir

2022

Sakarya Medical Journal

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Amaç: Bu çalışmada 0-24 ay arası çocuklarda ön fontanel (ÖF) kapanma zamanı ve boyutlarını değerlendirmeyi amaçladık. Bu çalışmanın ikincil amacı ise ÖF boyutu ve subaraknoid mesafe genişliği arasındaki ilişkinin araştırılmasıdır. Gereç ve Yöntemler: Bu çalışmada Ocak 2020 ve Ekim 2021 tarihleri arasında hafif kafa travması nedeniyle bilgisayarlı tomografi (BT) çekilen olguların görüntüleri retrospektif olarak değerlendirildi. 3D BT görüntüleri üzerinde ön fontanel kapanması (ÖFK) değerlendirildi ve açık olanlarda ÖF alanı ölçüldü. Aksiyal BT görüntülerde subaraknoid mesafe ölçümleri gerçekleştirildi. Bulgular: Hafif kafa travması nedeniyle BT çekilen 602 çocuk çalışmaya dahil edildi. 0-24 ay arasında her aylık yaş grubunda 23-25 olgu mevcuttu. K/E oranı 284/317 idi. Radyolojik olarak 0-6 ay arası, klinik olarak 0-2 ay arası ÖFK izlenmedi. Klinik ÖFK 3. ayda başlayıp 13. ayda % 66’ya 15. ayda % 90’ın üzerine, radyolojik ÖFK ise 7. ayda başlayıp, 16. ayda % 65’e ve 24. ayda % 84’e ulaşmıştır. Ortalama ÖF alanı doğumdan 2. aya kadar artmış, 3-9 aylarda azalan dalgalı bir seyir göstermiş ve 9. aydan 2 yaşa kadar ise giderek azalmıştır. ÖF alanı ile subaraknoid mesafe genişliği arasında ilişki saptanmadı (r:0,229, p

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“…Segmentation of neonatal brain MR images in preterm and full term babies remains a real challenge due to the small size of the head, the partial volume effect (PVE) and the thickness of the skull (Roche-Labarbe et al 2008, Lew et al 2013, Azizollahi et al 2014, 2017, Gargiulo et al 2015, Routier et al 2017. The neonatal head undergoes dramatic heterogeneous structural changes during prenatal and postnatal growth (Hansman 1966, Paus et al 1999, Noorizadeh et al 2015. At birth, the neonatal skull is not fully ossified and bony structures can move slightly to accommodate brain expansion during maturation.…”

Section: Introductionmentioning

confidence: 99%

Effect of structural complexities in head modeling on the accuracy of EEG source localization in neonates

2020

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Objective. Neonatal electroencephalography (EEG) source localization is highly prone to errors due to head modeling deficiencies. In this study, we investigated the effect of head model complexities on the accuracy of EEG source localization in full term neonates using a realistic volume conductor head model. Approach. We performed numerical simulations to investigate source localization errors caused by cerebrospinal fluid (CSF) and fontanel exclusion and gray matter (GM)/white matter (WM) distinction using the finite element method. Main results. Our results showed that the exclusion of CSF from the head model could cause significant localization errors mostly for sources closer to the inner surface of the skull. With a less pronounced effect compared to the CSF exclusion, the discrimination between GM and WM also widely affected all sources, especially those located in deeper structures. The exclusion of the fontanels from the head model led to source localization errors for sources located in areas beneath the fontanels. Our finding clearly shows that the CSF inclusion and GM/WM distinction in EEG inverse modeling can substantially reduce EEG source localization errors. Moreover, fontanels should be included in neonatal head models, particularly in source localization applications, in which sources of interest are located beneath or in vicinity of fontanels. Significance. Our ﬁndings have practical implications for a better understanding of the impact of head model complexities on the accuracy of EEG source localization in neonates.

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Evaluation of anterior fontanel size and area in the newborn using CT images

Cited by 4 publications

References 12 publications

Development of skeletal systems for ICRP pediatric mesh-type reference computational phantoms

Development of skeletal systems for ICRP pediatric mesh-type reference computational phantoms

Evaluation of Anterior Fontanelle Sizes and Closure Time in Children with Computed Tomography

Effect of structural complexities in head modeling on the accuracy of EEG source localization in neonates

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