Crista Galli Morphometry and Morphology: An Anatomical, Radiological, and Machine Learning Application Study / Crista Galli Morfometría y Morfología: Un Estudio de Aplicación Anatómica, Radiológica y de Aprendizaje Automático

SUMMARY: The study purposed to examine the morphometry and morphology of crista galli in cone beam computed tomography (CBCT) and apply a new analysis, supervised Machine Learning techniques to find the answers to research questions "Can sex be determined with crista galli morphometric measurements?" or "How effective are the crista galli morphometric measurements in determining sex?". Crista galli dimensions including anteroposterior, superoinferior, and laterolateral were measured and carried out on 200 healthy adult subjects (98 females; 102 males) aged between 18-79 years. Also, crista galli was classified with two methods called morphological types and Keros classification. In this study, the Chi-square test, Student's t-test, and Oneway ANOVA were performed. Additionally, Machine Learning techniques were applied. The means of the CGH, CGW, and CGL were found as 14.96 mm; 3.96 mm, and 12.76 mm in males, respectively. The same values were as 13.54 mm; 3.51 mm and 11.59±1.61 mm in females, respectively. The CG morphometric measurements of males were higher than those of females. There was a significant difference between sexes in terms of morphological classification type. Also, when the sex assignment of JRip was analyzed, out of 102 male instances 62 of them were correctly predicted, and for 98 female instances, 70 of them were correctly predicted according to their CG measurements. The JRip found the following classification rule for the given dataset: "if CGH<=14.4 then sex is female, otherwise sex is male". The accuracy of this rule is not high, but it gives an idea about the relationship between CG measurements and sex. Although the issue that CG morphometric measurements can be used in sex determination is still controversial, it was concluded in the analysis that CG morphometric measurements can be used in sex determination. Also, Machine Learning Techniques give an idea about the relationship between CG measurements and sex.

En el estudio se propuso examinar la morfometría y la morfología de la crista galli del hueso etmoides usando tomografía computarizada de haz cónico (CBCT) y aplicar un nuevo análisis, técnicas de aprendizaje automático supervisado para encontrar las respuestas a las preguntas de investigación "¿Se puede determinar el sexo con mediciones morfométricas de la crista galli?" o "¿Qué tan efectivas son las medidas morfométricas de la crista galli para determinar el sexo?". Las dimensiones de la crista galli, incluidas los diámetros anteroposterior, superoinferior y laterolateral, se midieron y realizaron en 200 sujetos adultos sanos (98 mujeres; 102 hombres) con edades comprendidas entre los 18 y los 79 años. La crista galli se clasificó con dos métodos llamados tipos morfológicos y clasificación de Keros. En este estudio, se realizaron la prueba de Chicuadrado, la prueba t de Student y ANOVA de una vía. Adicionalmente, se aplicaron técnicas de Machine Learning. Las medias de CGH, CGW y CGL se encontraron en 14,96 mm; 3,96 mm y 12,76 mm en hombres, respectivamente. Los mismos valores fueron 13,54 mm; 3,51 mm y 11,59 ± 1,61 mm en mujeres, respectivamente. Las medidas morfométricas del CG de los hombress fueron más altas que las de las mujeres. Hubo una diferencia significativa entre sexos en cuanto al tipo de clasificación morfológica. Además, cuando se analizó la asignación de sexo de JRip, de 102 instancias masculinas, 62 de ellas se predijeron correctamente, y de 98 instancias femeninas, 70 de ellas se predijeron correctamente de acuerdo con las mediciones de CG. El JRip encontró la siguiente regla de clasificación para el conjunto de datos dado: "si CGH<=14.4, por tanto el sexo es femenino, de lo contrario, el sexo es masculino". La precisión de esta regla no es alta, pero da una idea de la relación entre las medidas del CG y el sexo. Aunque la pregunta si las medidas morfométricas CG se pueden usar en la determinación del sexo sigue aún siendo controvertida. Se concluyó en el análisis que las medidas morfométricas CG se pueden usar en la determinación del sexo. Además, las técnicas de aprendizaje automático dan una idea de la relación entre las medidas de CG y el sexo.

Nasosinusal Endoscopic Anatomy and Physiology

The present article focuses on the analysis of the nasal cavity's anatomy succinctly and descriptively. This essay was carried out through a bibliographic review, directed to the detailed anatomy of the nasal cavity, and the structures that form its sinuses. We have identified the need formore studies directed to the related anatomical area so that the improved knowledge of this region ensures a nasoendoscopic treatment with better effectiveness and no complications.

Biometría etmoidal realizada por tomografía computarizada / Biometrics ethmoid by Computed Tomography

Introducción: El etmoides, en los últimos 20 años adquirió relevancia para anatomistas, clínicos, neurocirujanos y otorrinolaringólogos, por el desarrollo de técnicas quirúrgicas endoscópicas y múltiples variantes anatómicas que presenta. Objetivo: Este trabajo fue elaborado con el objetivo de establecer en nuestra muestra la profundidad del techo etmoidal predominante por sexo en población estudiada; frecuencia con la que se presenta simetría en el techo etmoidal; frecuencia con la que se encuentran celdas supraorbitarias en población estudiada; por último, se pretende establecer percentiles por sexo de dimensiones del etmoides en población adulta. Material y método: Estudio observacional descriptivo de corte transverso en el que se realizó revisión retrospectiva, consecutiva de tomografías de senos paranasales en cortes axiales, coronales y sagitales de pacientes mayores de 20 años, del Departamento de Radiología de los Hospitales, de Clínicas, del IPS, del Regional de Luque, Clínica Iribas y del Instituto Radiológico Calvo, Asunción, Paraguay. Resultados: Se encontró que la profundidad del techo etmoidal fue de Keros II en ambos sexos y ambas fosas nasales; se encontró simetría en el 60%; celdas supraorbitarias se encontraron en el 27,5% de casos. Conclusiones: Mediciones realizadas por tomografía computarizada en etmoides de pacientes que participaron del estudio, no difieren de las mediciones realizadas por otros autores. Estos resultados contribuyen a mejorar conocimientos de variantes anatómicas propias de nuestra población para difundirlos, ponerlos en práctica y mejorar la experiencia en el manejo integral de pacientes con patologías médico-quirúrgicas de senos paranasales.

Introduction: The ethmoid is a structure that has become relevant for anatomists, clinicians, neurosurgeons and otolaryngologists due the great development of endoscopic surgical techniques and multiple anatomic variants. Aim: This work was developed with the goal of establishing in our sample studied, depth of ethmoid roof, predominant by gender; frequency with which symmetry in ethmoid roof is presented, and frequency with which supraorbital cells is in sample studied. Finally, the study is aimed to establish percentages by gender, the dimensions of the ethmoid on adult population. Material and methods: The cross-sectional, descriptive observational study in which retrospective review was performed consecutively, tomographic studies of the paranasal sinuses in axial, coronal and sagittal on patients over 20 years old at the Radiology Department of the Hospitals, Clinics, IPS, Regional in Luque, Iribas Clinical Institute, and Calvo Radiological Institute. Results: The studies performed revealed that the depth of the ethmoid roof was Keros II in both genders and both nostrils, the symmetry was found in 60%, the supraorbital cells were found in 27.5% of both cases. Conclusions: Measurements by computed tomography in ethmoid bone of patients who participated in this study do not differ from the measurements performed by other authors.

[Prevalence of infraorbital ethmoid air cell on panoramic radiographs]

Presence of Haller cells with or without disease can narrow the ethmoid infundibulum or ostium of maxillary antrum and result in persistent rhinosinusitis, recurrent sinusitis, and other clinical symptoms, so detection of haller cells in common panoramic radiographs can be useful in diagnosis of the origin of these problems. The purpose of the present study was to determine the prevalence of infraorbital ethmoid cells on panoramic radiographs. Panoramic radiographs of 310 patients were evaluated according to the method of Ahmad et al. to detect infraorbital ethmoid cells. A well defined radiolucency was located medial to infraorbital foramen, wherever most of its border was visible and caused lack of cortication in inferior border of the orbit in the superimposition areas, was interpreted as infraorbital ethmoid cell. The radiographs were interpreted by three observers. the data were analyzed by Binary logistic regression test in SPSS software. Data from 310 panoramic radiographs were analyzed. 37% of radiographs were interpreted as to show infraorbital ethmoid cells. Infraorbital ethmoid cell might be considered as a quite common anatomic landmark, visible on panoramic radiographs. From a clinical point of view, this may be of diagnostic importance, because it has been stated that detection of haller cells may lead to detection of the origin of a number of sinus problems

Estudo anatômico do teto do etmóide aplicado a cirurgia endoscópica / Anatomic study of the roof of the ethmoid and endoscopic sinus surgery

O presente estudo foi desenvolvido com a finalidade de identificar anormalidades da estrutura óssea de teto do etmóide. Foram preparados 30 etmóides para observaçao sobre microscopia óptica. Encontramos algumas áreas de grande vulnerabilidade a lesoes durante a cirurgia endoscópica nasossinusal, devido a presença de rarefaçoes e defeitos ósseos. Os resultados sugerem que a parede medial e o canal da artéria etmoidal anterior representam as áreas de maior fragilidade do teto do etmóide.