Ultrasound evaluation of the normal fetal pharynx

Tez, Selda; Köktener, Aslı; Aksoy, Fatma Gül; Turhan, Nilgün Öztürk; Dilmen, Gülçin

doi:10.1016/j.earlhumdev.2005.05.002

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…Other studies described the correlation between gestational age and the measurements of different anatomical structures. Tez et al found a positive relationship with advancing gestational age of the pharyngeal diameter. Richards and Farah found linear correlation between the pharyngeal and tracheal diameters and gestational age at 12–40 weeks.…”

Section: Discussionmentioning

confidence: 95%

“…Our main purpose was to present a systematic approach for their evaluation, employing 2D‐US, Doppler applications, 3D‐US MPR and rendering algorithms. Although the fetal pharynx and larynx have been the subject of previous studies, comprehensive and general description was lacking. We focused on all of the anatomical components, on the anatomical relations between them and on the function of the pharynx and larynx.…”

Section: Discussionmentioning

confidence: 99%

“…The larynx is a specialized organ that provides a protective sphincter at the inlet of the airway passages and is responsible for production of the voice. Several groups have investigated the sonographic features and development of the fetal pharynx and larynx, but all used two‐dimensional ultrasound (2D‐US) in a coronal plane, with relatively limited visualization.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The fetal larynx and pharynx: structure and development on two‐ and three‐dimensional ultrasound

Liberty

Boldes

Shen

et al. 2013

Ultrasound in Obstet & Gyne

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The fetal larynx and pharynx: structure and development on two‐ and three‐dimensional ultrasound

Liberty

Boldes

Shen

et al. 2013

Ultrasound in Obstet & Gyne

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show abstract

“…To simplify the design, the cross-sectional shapes of all tracts are considered as ellipses or circles. The size of each part is determined by referring to [22]- [24]. Through the manual rotation and translation of the designed structure in 3D space, we can achieve a 3D fetal model with an oral cavity and airways, as shown in Fig.…”

Section: Design Of the Fetal Oral Cavity And Airwaysmentioning

confidence: 99%

Locating Fetal Facial Surface, Oral Cavity and Airways by a 3D Ultrasound Calibration Using a Novel Cones' Phantom

Ohya

Sato

et al. 2014

IEICE Trans. Inf. & Syst.

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SUMMARYToward the actualization of an automatic navigation system for fetoscopic tracheal occlusion (FETO) surgery, this paper proposes a 3D ultrasound (US) calibration-based approach that can locate the fetal facial surface, oral cavity, and airways by a registration between a 3D fetal model and 3D US images. The proposed approach consists of an offline process and online process. The offline process first reconstructs the 3D fetal model with the anatomies of the oral cavity and airways. Then, a point-based 3D US calibration system based on real-time 3D US images, an electromagnetic (EM) tracking device, and a novel cones' phantom, computes the matrix that transforms the 3D US image space into the world coordinate system. In the online process, by scanning the mother's body with a 3D US probe, 3D US images containing the fetus are obtained. The fetal facial surface extracted from the 3D US images is registered to the 3D fetal model using an ICP-based (iterative closest point) algorithm and the calibration matrices, so that the fetal facial surface as well as the oral cavity and airways are located. The results indicate that the 3D US calibration system achieves an FRE (fiducial registration error) of 1.49±0.44 mm and a TRE (target registration error) of 1.81±0.56 mm by using 24 fiducial points from two US volumes. A mean TRE of 1.55±0.46 mm is also achieved for measuring location accuracy of the 3D fetal facial surface extracted from 3D US images by 14 target markers, and mean location errors of 2.51±0.47 mm and 3.04±0.59 mm are achieved for indirectly measuring location accuracy of the pharynx and the entrance of the trachea, respectively, which satisfy the requirement of the FETO surgery. key words: 3D location, fetal oral cavity and airways, 3D ultrasound calibration, iterative closest point algorithm, 3D fetal model, 3D electromagnetic tracking device

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Current awareness in prenatal diagnosis

2006

Prenat. Diagn.

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In order to keep subscribers up‐to‐date with the latest developments in their field, John Wiley & Sons are providing a current awareness service in each issue of the journal. The bibliography contains newly published material in the field of prenatal diagnosis. Each bibliography is divided into 17 sections: 1 Books, Reviews & Symposia; 2 General Interest; 3 Normal Fetal Development; 4 Gametogenesis and Pre‐implantation Diagnosis; 5 First Trimester Diagnosis; 6 Second Trimester Diagnosis; 7 Fetal Diagnosis by Ultrasound and Other Imaging; 8 Maternal Screening; 9 Screening for Carriers of Genetic Abnormality; 10 Technological Developments; 11 Confined Placental Mosaicism and Uniparental Disomy; 12 Molecular Cytogenetics; 13 Fetal Cells in Maternal Circulation; 14 Fetal Therapy; 15 Psychosocial Aspects; 16 Epidemiology and Environmental Factors; 17 Developmental Pathology. Within each section, articles are listed in alphabetical order with respect to author. If, in the preceding period, no publications are located relevant to any one of these headings, that section will be omitted

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Ultrasound evaluation of the normal fetal pharynx

Cited by 4 publications

References 7 publications

The fetal larynx and pharynx: structure and development on two‐ and three‐dimensional ultrasound

The fetal larynx and pharynx: structure and development on two‐ and three‐dimensional ultrasound

Locating Fetal Facial Surface, Oral Cavity and Airways by a 3D Ultrasound Calibration Using a Novel Cones' Phantom

Current awareness in prenatal diagnosis

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