Reference Values for the Length and Area of the Fetal Corpus Callosum on 3-Dimensional Sonography Using the Transfrontal View

2012 ◽  
Vol 31 (2) ◽  
pp. 205-212 ◽  
Author(s):  
Edward Araujo Júnior ◽  
Milena Visentainer ◽  
Christiane Simioni ◽  
Rodrigo Ruano ◽  
Luciano Marcondes Machado Nardozza ◽  
...  
Keyword(s):  
Corpus Callosum ◽  
Reference Values ◽  
3 Dimensional ◽  
Length And Area

Reference Ranges of Fetal Cisterna Magna Length and Area Measurements by 3-Dimensional Ultrasonography Using the Multiplanar Mode

2014 ◽  
Vol 30 (2) ◽  
pp. 209-215
Author(s):  
Ana Paula Passos ◽  
Edward Araujo Júnior ◽  
Rafael Frederico Bruns ◽  
Luciano Marcondes Machado Nardozza ◽  
Antonio Fernandes Moron
Keyword(s):  
Reference Ranges ◽  
3 Dimensional ◽  
Cisterna Magna ◽  
Length And Area

Computer-Aided Three-Dimensional Reconstruction and Measurement of the Vestibular End-Organs

1988 ◽  
Vol 98 (3) ◽  
pp. 195-202 ◽  
Author(s):  
Akira Takagi ◽  
Isamu Sando ◽  
Akira Takagi ◽  
Isamu Sando
Keyword(s):  
Temporal Bone ◽  
Three Dimensional ◽  
Three Dimensions ◽  
Small Computer ◽  
Lateral Semicircular Canal ◽  
3 Dimensional ◽  
Dimensional Reconstruction ◽  
Vestibular Endorgans ◽  
Length And Area ◽  
Bone Structures

It is very valuable for temporal bone morphologists to be able to recognize temporal bone serial sections in three dimensions and to be able to measure temporal bone structures three-dimensionally. We can now do 3-dimensional reconstruction to visualize the structures of vestibular endorgans (utricular and saccular maculae) and measure these endorgans in space by means of a small computer system and software that we developed. As well as obtaining the dimensions—such as length and area—of the utricular and saccular maculae, we also found that (1) most of the utricular macula lies in one plane, which is the same as the plane of the lateral semicircular canal, (2) the saccular macula is shaped like part of a sphere, and (3) the angle between the two maculae is less than a right angle. Such knowledge is indispensable to the evaluation of the function of the utricular and saccular maculae.)

P01.11: Correlation of fetal length and area of corpus callosum by 3D sonography with 2D biometric parameters

2011 ◽  
Vol 38 (S1) ◽  
pp. 171-171
Author(s):  
L. C. Bussamra ◽  
M. Visentainer ◽  
L. C. Rolo ◽  
L. Nardozza ◽  
E. Araujo Junior ◽  
...  
Keyword(s):  
Corpus Callosum ◽  
Biometric Parameters ◽  
Length And Area ◽  
3D Sonography

scholarly journals Electron microscopy 3-dimensional segmentation and quantification of axonal dispersion and diameter distribution in mouse brain corpus callosum

2018 ◽  
Author(s):  
Hong-Hsi Lee ◽  
Katarina Yaros ◽  
Jelle Veraart ◽  
Jasmine Pathan ◽  
Feng-Xia Liang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Corpus Callosum ◽  
Time Dependence ◽  
Mouse Brain ◽  
Fiber Orientation ◽  
Diffusion Mri ◽  
Orientation Distribution ◽  
Diffusion Time ◽  
3 Dimensional ◽  
Axonal Diameter

AbstractTo model the diffusion MRI signal in brain white matter, general assumptions have been made about the microstructural properties of axonal fiber bundles, such as the axonal shape and the fiber orientation dispersion. In particular, axons are modeled by perfectly circular cylinders with no diameter variation within each axon, and their directions obey a specific orientation distribution. However, these assumptions have not been validated by histology in 3-dimensional high-resolution neural tissue. Here, we reconstructed sequential scanning electron microscopy images in mouse brain corpus callosum, and introduced a semi-automatic random-walker (RaW) based algorithm to rapidly segment individual intra-axonal spaces and myelin sheaths of myelinated axons. Confirmed with a conventional machine-learning-based interactive segmentation method, our semi-automatic algorithm is reliable and less time-consuming. Based on the segmentation, we calculated histological estimates of size-related (e.g., inner axonal diameter, g-ratio) and orientation-related (e.g., Fiber orientation distribution and its rotational invariants, dispersion angle) quantities, and simulated how these quantities would be observed in actual diffusion MRI experiments by considering diffusion time-dependence. The reported dispersion angle is consistent with previous 2-dimensional histology studies and diffusion MRI measurements, though the reported diameter is larger than those in other mouse brain studies. Our results show that the orientation-related metrics have negligible diffusion time-dependence; however, inner axonal diameters demonstrate a non-trivial time-dependence at diffusion times typical for clinical and preclinical use. In other words, the fiber dispersion estimated by diffusion MRI modeling is relatively independent, while the "apparent" axonal size estimated by axonal diameter mapping potentially depends on experimental MRI settings.

P01.12: Reference ranges of fetal length and area of corpus callosum by three-dimensional ultrasonography

2011 ◽  
Vol 38 (S1) ◽  
pp. 171-171
Author(s):  
M. Visentainer ◽  
E. Araujo Junior ◽  
L. Nardozza ◽  
L. C. Rolo ◽  
A. F. Moron
Keyword(s):  
Corpus Callosum ◽  
Three Dimensional ◽  
Reference Ranges ◽  
Length And Area

Anatomic Understanding of Subtotal Hemispherotomy Using Cadaveric Brain, 3-Dimensional Simulation Models, and Intraoperative Photographs

2019 ◽  
Vol 18 (6) ◽  
pp. E209-E218 ◽  
Author(s):  
Takehiro Uda ◽  
Noritsugu Kunihiro ◽  
Saya Koh ◽  
Yoko Nakanishi ◽  
Kosuke Nakajo ◽  
...  
Keyword(s):  
Corpus Callosum ◽  
Frontal Lobe ◽  
Anterior Part ◽  
Simulation Models ◽  
Brain Structures ◽  
Magnetic Resonance Images ◽  
Dimensional Model ◽  
3 Dimensional ◽  
Dimensional Reconstruction ◽  
Dimensional Simulation

Abstract BACKGROUND When the epileptogenic foci skip the motor area, the epilepsy can be cured by surgery while preserving the motor function. This surgery has been reported as subtotal hemispherectomy. The disconnective variant of this surgery, subtotal hemispherotomy, is described. OBJECTIVE To demonstrate each step clearly, a cadaveric brain, 3-dimensional reconstruction and simulation model, and intraoperative photographs were used. METHODS A formalin-fixed cadaveric brain was dissected to show each step of this surgery. For the 3-dimensional model, several brain structures were reconstructed from preoperative images, and the surgery was simulated. Intraoperative photographs and postoperative magnetic resonance images were taken from the representative cases. RESULTS Temporo-parieto-occipital disconnection is performed to disconnect these lobes and the insula, limbic system, and splenium of the corpus callosum. The postcentral sulcus is the anterior border of the disconnection. Next, prefrontal disconnection is performed to disconnect the frontal lobe and the insula, frontal lobe and basal ganglia, and the anterior part of the corpus callosum. The precentral sulcus is the posterior border of the disconnection. Finally, corpus callosotomy of the central part is performed. After these steps, subtotal hemispherotomy, with preservation of the pre- and postcentral gyrus, is achieved. The 3-dimensional model clearly shows the anatomic relationships between deep brain structures. In the representative cases, postoperative motor deterioration was transient or none, and seizure-free status was achieved after surgery. CONCLUSION Subtotal hemispherotomy is generally difficult because of the complicated anatomy and narrow and deep surgical corridors. Combined use of these methods facilitates a clearer understanding of this surgery.

Morphometry of Corpus Callosum in South Indian Population

2021 ◽  
pp. 097275312110598
Author(s):  
Sushma Rao Poleneni ◽  
Lakshmi Durga Jakka ◽  
Mrudula Chandrupatla ◽  
L. Vinodini ◽  
K. Ariyanachi
Keyword(s):  
Statistical Analysis ◽  
Corpus Callosum ◽  
Reference Values ◽  
Indian Population ◽  
South Indian Population ◽  
Frontal Pole ◽  
Longitudinal Dimension ◽  
South Indian ◽  
Occipital Pole ◽  
The Brain

Background: The corpus callosum (CC) is a connecting bridge between two cerebral hemispheres and helps in interhemispheric integration of information. Purpose: The primary objective of the study is to explain the topographical position of CC in relation to the brain in the South Indian population, contributing to the reference values of measurements of CC, which helps in planning surgical interventions. Also, the reference values help in cross-referencing with other populations and ethnic group. Methods and Material: In the study, 40 formalin fixed, full brain specimens were cut in midsagittal plane and CC was measured along with its relation to the brain. The major diameters considered were longitudinal dimension of corpus callosum (LC), distance of CC from frontal pole to genu (AS), distance of CC occipital pole to splenium (PS), and longitudinal dimension of brain (LB) from frontal pole to occipital pole. Statistical Analysis Used: The statistical analysis was carried with the mean, standard deviation, 95% CI, and the range measured for each measurement. The Pearson coefficient was evaluated between dimensions of brain and CC. Multivariate linear regression analysis was done to correlate between LB as a dependent variable, and LC, vertical dimension of brain (CD), and PS as independent variables. Results: Pearson’s ratio showed a positive correlation between LB and PS (0.61), and also between LB and LC (0.59). The ratio of LC/LB was 0.45 and LC/CD was 0.69, which are stable in all brains studied. Conclusions: The study concludes that CC maintains a stable proportion with its parts (genu, rostrum, body, and splenium) and with the horizontal dimension of the brain. Further, measured values help in cross-referencing with other population.

Assessment of Corpus Callosum Biometric Measurements at 18 to 32 Weeks' Gestation by 3-Dimensional Sonography

2011 ◽  
Vol 30 (1) ◽  
pp. 47-53 ◽  
Author(s):  
Giuseppe Rizzo ◽  
Maria Elena Pietrolucci ◽  
Alessandra Capponi ◽  
Domenico Arduini
Keyword(s):  
Corpus Callosum ◽  
3 Dimensional ◽  
Biometric Measurements
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