Use of three-dimensional (3D) sonography to assess the true midsagittal plane of fetal spine

2010 ◽  
Vol 24 (2) ◽  
pp. 297-300 ◽  
Author(s):  
Xiao Hong Yang ◽  
Min Chen ◽  
Tak Yeung Leung ◽  
Sau Mei Wong ◽  
Tze Kin Lau
Keyword(s):  
Three Dimensional ◽  
Midsagittal Plane ◽  
Fetal Spine ◽  
3D Sonography

scholarly journals P25.10: Use of three-dimensional (3D) sonography to assess the true midsagittal plane of fetal spine

2010 ◽  
Vol 36 (S1) ◽  
pp. 267-267
Author(s):  
M. Chen ◽  
X. Yang ◽  
T. Leung ◽  
S. Wong ◽  
T. Lau
Keyword(s):  
Three Dimensional ◽  
Midsagittal Plane ◽  
Fetal Spine ◽  
3D Sonography

Three-dimensional ultrasound of the fetal spine

1997 ◽  
Vol 89 (3) ◽  
pp. 434-438 ◽  
Author(s):  
D JOHNSON ◽  
D PRETORIUS ◽  
M RICCABONA ◽  
N BUDORICK ◽  
T NELSON
Keyword(s):  
Three Dimensional ◽  
Fetal Spine

Two- and three-dimensional sonography of anomalies of orofacial area in the first trimester of gestation

2020 ◽  
Author(s):  
N.A. Venchikova, À.À. Ershova-Pavlova, I.V. Novikova et all
Keyword(s):  
Pregnant Women ◽  
Three Dimensional ◽  
First Trimester ◽  
Population Based ◽  
Control Group ◽  
Axial Section ◽  
Mother And Child ◽  
Trimester Screening ◽  
2D Ultrasound ◽  
3D Sonography

As part of the population-based prenatal screening of 900 pregnant women, who underwent 1st trimester screening at the RPMC “Mother and Child” in 2018–2019, an ultrasound scan of the fetal palate was performed to evaluate the effectiveness of new ultrasound markers in detecting orofacial clefts (OFC). Fetal palatal defects were screened at a 2D assessment of bone markers of the palate – the image of the palatal line in the sagittal section, the retronasal triangle in the coronary section, the alveolar arch of the upper jaw in the axial section. If a palate abnormality was detected or suspected in the 2D study, the fetal palate was evaluated using the 3D mode. In 50 pregnant women of the control group, 3D sonography of the fetal palate was performed in the norm. In total, during the gestation period of 10+5–12+5 weeks, 10 cases of OFC were detected, of which 1 case was a median lip/palate cleft (LPC), 6 — bilateral LPC, 1 — left-sided LPC, 1 — unspecified LPC, 1 — PC. Visualization of 2D ultrasound markers was possible in 9 cases of palate anomalies, 3D assessment worked out in all 10 cases. In all identified OFC cases, cytogenetic and/or pathomorphological studies were performed.

scholarly journals Three-Dimensional Soft Tissue Nasal Changes After Nasoalveolar Molding and Primary Cheilorhinoplasty in Infants With Unilateral Cleft Lip and Palate

2018 ◽  
Vol 56 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Laura Mancini ◽  
Travis L. Gibson ◽  
Barry H. Grayson ◽  
Roberto L. Flores ◽  
David Staffenberg ◽  
...  
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Three Dimensional ◽  
Case Series ◽  
Midsagittal Plane ◽  
Retrospective Case ◽  
Anthropometric Measures ◽  
Nasal Tip ◽  
Nasoalveolar Molding ◽  
Nasal Changes

Objective: To quantify 3-dimensional (3D) nasal changes in infants with unilateral cleft lip with or without cleft palate (UCL±P) treated by nasoalveolar molding (NAM) and cheilorhinoplasty and compare to noncleft controls. Design: Retrospective case series of infants treated with NAM and primary cheilorhinoplasty between September, 2012 and July, 2016. Infants were included if they had digital stereophotogrammetric records at initial presentation (T1), completion of NAM (T2), and following primary cheilorhinoplasty (T3). Images were oriented in 3dMD Vultus software, and 16 nasolabial points identified. Patients: Twenty consecutively treated infants with UCL±P. Interventions: Nasoalveolar molding and primary cheilorhinoplasty. Main Outcome Measures: Anthropometric measures of nasal symmetry and morphology were compared in the treatment group between time points using paired Student t tests. Postsurgical nasal morphology was compared to noncleft controls. Results: Nasal tip protrusion increased, and at T3 was 2.64 mm greater than noncleft controls. Nasal base width decreased on the cleft side by 4.01 mm after NAM and by 6.73 mm after cheilorhinoplasty. Columellar length of the noncleft to cleft side decreased from 2:1 to 1:1 following NAM. Significant improvements in subnasale, columella, and nasal tip deviations from midsagittal plane were observed. Treatment improved symmetry of the alar morphology angle and the nasal base–columella angle between cleft and noncleft sides. Conclusions: Three-dimensional analysis of UCL±P patients demonstrated significant improvements in nasal projection, columella length, nasal symmetry, and nasal width. Compared to noncleft controls, nasal form was generally corrected, with overcorrection of nasal tip projection, columella angle, and outer nasal widths.

Flight performance and visual control of flight of the free-flying housefly ( Musca domestica L.) I. Organization of the flight motor

1986 ◽  
Vol 312 (1158) ◽  
pp. 527-551 ◽  
Keyword(s):  
Coordinate System ◽  
Degrees Of Freedom ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Rigid Bodies ◽  
The Body ◽  
Midsagittal Plane ◽  
Torque Vector ◽  
Translation Velocity ◽  
Flight Motor

Free-flying houseflies have been filmed simultaneously from two sides. The orientation of the flies’ body axes in three-dimensional space can be seen on the films. A method is presented for the reconstruction of the flies’ movements in a fly-centred coordinate system, relative to an external coordinate system and relative to the airstream. The flies are regarded as three-dimensionally rigid bodies. They move with respect to the six degrees of freedom they thus possess. The analysis of the organization of the flight motor from the kinematic data leads to the following conclusions: the sideways movements can, at least qualitatively, be explained by taking into account the sideways forces resulting from rolling the body about the long axis and the influence of inertia. Thus, the force vector generated by the flight motor is most probably located in the fly’s midsagittal plane. The direction of this vector can be varied by the fly in a restricted range only. In contrast, the direction of the torque vector can be freely adjusted by the fly. No coupling between the motor force and the torques is indicated. Changes of flight direction may be explained by changes in the orientation of the body axes: straight flight at an angle of sideslip differing from zero is due to rolling. Sideways motion during the banked turns as well as the decrease of translation velocity observed in curves are a consequence of the inertial forces and rolling. The results are discussed with reference to studies about the aerodynamic performance of insects and the constraints for aerial pursuit.

Image Corrected Cephalometric Analysis (ICCA): Design and Evaluation

1993 ◽  
Vol 30 (6) ◽  
pp. 528-541 ◽  
Author(s):  
John L. Spolyar ◽  
William Vasileff ◽  
Robert B. Macintosh ◽  
Bodil Rune ◽  
John L. Spolyar
Keyword(s):  
Dimensional Space ◽  
Three Dimensional ◽  
Bilateral Symmetry ◽  
Bone Marker ◽  
Cephalometric Analysis ◽  
Two Dimensional ◽  
Midsagittal Plane ◽  
Two Dimensional Image ◽  
Marker Point ◽  
Serial Measurements

Image corrected cephalometric analysis (ICCA) Is a method for eliminating serial image parallax error. In a radiographic survey, image parallax is an inherent and random property of the two-dimensional Image of the subject. Radiographs of the same subject taken at different times will be different in image parallax. This difference, parallax error, is routinely displayed between serial radiographic studies. Parallax error discourages the use of conventional serial cephalometric surveys for tracking and studying changes in discrete craniofacial structures lying outside the midsagittal plane, unilaterally disposed, or changing without bilateral symmetry. Anatomic outlines or discrete points of such structures would routinely display measurement perturbations caused by image parallax differences between surveys. The ICCA method eliminates this problem. Therefore, accurate serial measurements of bone marker point displacements are made possible with two-dimensional reconstructions of points lying in three-dimensional space. The method of ICCA was tested for accuracy by using zero time serial cephalometric surveys of five subjects. Mean implant error of 0.12 mm (SD = 0.1) was found between predicted (ICCA) and actual measured Implant movement caused by the image parallax error. After applying this method, bone marker movements are unlikely to be caused by parallax error between conventional serial cephalometric studies. Furthermore, displacement growth can be related to the relocation of composite growth outlines and midline anatomic landmarks. One plagiocephaly case and one hemifacial microsomia case were used to demonstrate ICCA for growth and treatment effect documentation.

Use of a triaxial magnetometer for respiratory measurements

1991 ◽  
Vol 70 (5) ◽  
pp. 2311-2321 ◽  
Author(s):  
S. Levine ◽  
D. Silage ◽  
D. Henson ◽  
J. Y. Wang ◽  
J. Krieg ◽  
...  
Keyword(s):  
Chest Wall ◽  
Three Dimensional ◽  
Vertical Movement ◽  
The Body ◽  
Processing Unit ◽  
Midsagittal Plane ◽  
Posterior Spine ◽  
P Movement ◽  
Normal Men ◽  
Spinal Flexion

We describe a triaxial magnetometer (Tri-mag) system, which consists of a transmitter, four sensors, a processing unit, and a personal computer (PC). The Tri-mag processing unit outputs the position of each sensor relative to the transmitter in three orthogonal coordinates, and this information is communicated to the PC. First, we demonstrated that within a defined octant of a sphere in which the center is the transmitter, we can measure radial distances with an accuracy of +/- 1 mm over a range extending from 10 to 70 cm from the transmitter. Second, we recorded the three-dimensional movement of sensors on the anterior and posterior surfaces of the chest wall during maximum voluntary ventilation in four normal men; all sensors were placed in the midsagittal plane of the body. Anterior sensors were located on the sternum at the level of the third intercostal space and at 2 cm above the umbilicus, whereas posterior sensors were located on the posterior spine at the same vertical levels as the anterior sensors. In all subjects the following was found. 1) Both anterior sensors moved anterior and cephalad during inspiration. The anterior thoracic sensor showed greater vertical than anteroposterior (A-P) movement, whereas the anterior abdominal sensor showed greater A-P than vertical movement. 2) Inspiration was associated with spinal extension, whereas expiration was associated with spinal flexion. Third, we used Tri-mag information to 1) measure tidal volume (VT) over a range extending from 500 ml to inspiratory capacity and 2) measure the change in end-expiratory lung volume (EELV) over a range extending from FRC to FRC plus a minimum of 1.5 liters. Our results indicate that greater than 96% of the changes in VT and greater than 82% of the changes in EELV can be accounted for by changes in A-P, vertical, and lateral dimensions of the chest wall.

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