Three-Dimensional Computed Tomography Cephalometry of Plagiocephaly: Asymmetry and Shape Analysis

2006 ◽  
Vol 43 (2) ◽  
pp. 201-210 ◽  
Author(s):  
D. J. Netherway ◽  
A. H. Abbott ◽  
N. Gulamhuseinwala ◽  
K. L. McGlaughlin ◽  
P. J. Anderson ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Small Sample Size ◽  
Three Dimensional ◽  
Principal Component ◽  
Facial Asymmetry ◽  
Cranial Base ◽  
Parietal Bone ◽  
Small Sample ◽  
Deformational Plagiocephaly ◽  
Cross Sectional

Objective To investigate facial asymmetry associated with both deformational and synostotic plagiocephaly and to identify variables based on skeletal landmarks that distinguish the conditions and quantify severity. Design Retrospective, cross sectional. Setting Australian Craniofacial Unit, Adelaide. Main Outcome Measures Proportional differences between bilateral distances and principal component (PC) analysis of the skeletal landmarks. Patients The three-dimensional positions of 78 osseous landmarks were determined from computed tomography (CT) scans of 21 patients with deformational plagiocephaly (DP), 20 patients with unilateral coronal synostosis (UCS), and 2 patients with unilateral lambdoid synostosis (ULS). Results For both DP and UCS, significant asymmetry was found for the orbital depths, mandibular lengths, maxillary depths, zygomatic arch lengths, lateral base of the parietal bone, and the angle between the anterior and the posterior cranial base projected onto the axial plane. The small sample size for ULS precluded definitive statistical statements but allowed some useful comparisons with the other conditions. The first three PC scores were able to distinguish among the three conditions and which side was affected. Conclusions The asymmetry of the cranial base and facial structures, arising from localized abnormality or deformational forces in either the frontal or the occipital regions, can be quantified by a plethora of bilateral features or summarized by PC analysis.

scholarly journals Reliability of three-dimensional anterior cranial base superimposition methods for assessment of overall hard tissue changes: A systematic review

2017 ◽  
Vol 88 (2) ◽  
pp. 233-245 ◽  
Author(s):  
Cecilia Ponce-Garcia ◽  
Manuel Lagravere-Vich ◽  
Lucia Helena Soares Cevidanes ◽  
Antonio Carlos de Olivera Ruellas ◽  
Jason Carey ◽  
...  
Keyword(s):  
Systematic Review ◽  
Small Sample Size ◽  
Three Dimensional ◽  
Cranial Base ◽  
Small Sample ◽  
Inclusion Criteria ◽  
Cross Sectional ◽  
Registration Method ◽  
Anterior Cranial Base ◽  
Tissue Changes

ABSTRACT Objective: The purpose of this systematic review was to synthesize the available literature concerning the reliability of three-dimensional superimposition methods when assessing changes in craniofacial hard tissues. Materials and Methods: Four electronic databases were searched. Two authors independently reviewed potentially relevant articles for eligibility. Clinical trials, cohort, case-control, and cross-sectional studies that evaluated the reliability of three-dimensional superimposition methods on the anterior cranial base were included. Results: Six studies fulfilled the inclusion criteria. Four studies used the voxel-based registration method, one used the landmark-based method and one used the surface-based method. Regarding reliability, the voxel-based studies showed on average a difference of 0.5 mm or less between images. The optimized analysis using a six-point correction algorithm in the landmark-based method showed 1.24 mm magnitude of error between images. Conclusions: Although reliability appears to be adequate, the small sample size and high risk of bias among studies make available evidence still insufficient to draw strong conclusions.

Validating the Factor Structure of the Stigma of Suicide Scale–Short Form Spanish Version Among Healthcare Students

Crisis ◽  
2020 ◽  
pp. 1-5
Author(s):  
Ruthmarie Hernández-Torres ◽  
Paola Carminelli-Corretjer ◽  
Nelmit Tollinchi-Natali ◽  
Ernesto Rosario-Hernández ◽  
Yovanska Duarté-Vélez ◽  
...  
Keyword(s):  
Factor Structure ◽  
Structural Equation ◽  
Short Form ◽  
Small Sample Size ◽  
Small Sample ◽  
Spanish Version ◽  
Equation Modeling ◽  
Cross Sectional ◽  
Healthcare Students ◽  
Spanish Speaking

Abstract. Background: Suicide is a leading cause of death among Spanish-speaking individuals. Suicide stigma can be a risk factor for suicide. A widely used measure is the Stigma of Suicide Scale-Short Form (SOSS-SF; Batterham, Calear, & Christensen, 2013 ). Although the SOSS-SF has established psychometric properties and factor structure in other languages and cultural contexts, no evidence is available from Spanish-speaking populations. Aim: This study aims to validate a Spanish translation of the SOSS-SF among a sample of Spanish-speaking healthcare students ( N = 277). Method: We implemented a cross-sectional design with quantitative techniques. Results: Following a structural equation modeling approach, a confirmatory factor analysis (CFA) supported the three-factor model proposed by Batterham and colleagues (2013) . Limitations: The study was limited by the small sample size and recruitment by availability. Conclusion: Findings suggest that the Spanish version of the SOSS-SF is a valid and reliable tool with which to examine suicide stigma among Spanish-speaking populations.

scholarly journals Accuracy and Reproducibility of Facial Measurements of Digital Photographs and Wrapped Cone Beam Computed Tomography (CBCT) Photographs

Diagnostics ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 757
Author(s):  
Maged Sultan Alhammadi ◽  
Abeer Abdulkareem Al-mashraqi ◽  
Rayid Hussain Alnami ◽  
Nawaf Mohammad Ashqar ◽  
Omar Hassan Alamir ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Soft Tissue ◽  
Cone Beam Computed Tomography ◽  
High Reliability ◽  
Three Dimensional ◽  
Cone Beam ◽  
Cross Sectional ◽  
Facial Profile ◽  
Digital Photographs ◽  
Gonial Angle

The study sought to assess whether the soft tissue facial profile measurements of direct Cone Beam Computed Tomography (CBCT) and wrapped CBCT images of non-standardized facial photographs are accurate compared to the standardized digital photographs. In this cross-sectional study, 60 patients with an age range of 18–30 years, who were indicated for CBCT, were enrolled. Two facial photographs were taken per patient: standardized and random (non-standardized). The non-standardized ones were wrapped with the CBCT images. The most used soft tissue facial profile landmarks/parameters (linear and angular) were measured on direct soft tissue three-dimensional (3D) images and on the photographs wrapped over the 3D-CBCT images, and then compared to the standardized photographs. The reliability analysis was performed using concordance correlation coefficients (CCC) and depicted graphically using Bland–Altman plots. Most of the linear and angular measurements showed high reliability (0.91 to 0.998). Nevertheless, four soft tissue measurements were unreliable; namely, posterior gonial angle (0.085 and 0.11 for wrapped and direct CBCT soft tissue, respectively), mandibular plane angle (0.006 and 0.0016 for wrapped and direct CBCT soft tissue, respectively), posterior facial height (0.63 and 0.62 for wrapped and direct CBCT soft tissue, respectively) and total soft tissue facial convexity (0.52 for both wrapped and direct CBCT soft tissue, respectively). The soft tissue facial profile measurements from either the direct 3D-CBCT images or the wrapped CBCT images of non-standardized frontal photographs were accurate, and can be used to analyze most of the soft tissue facial profile measurements.

scholarly journals Research on the Computed Tomography Pebble Flow Detecting System for HTR-PM

2017 ◽  
Vol 2017 ◽  
pp. 1-13
Author(s):  
Xin Wan ◽  
Ximing Liu ◽  
Jichen Miao ◽  
Peng Cong ◽  
Yuai Zhang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Helical Ct ◽  
Design Parameters ◽  
Three Dimensional Model ◽  
Safe Operation ◽  
Cross Sectional ◽  
Ct System ◽  
Near Future ◽  
Pebble Flow

Pebble dynamics is important for the safe operation of pebble-bed high temperature gas-cooled reactors and is a complicated problem of great concern. To investigate it more authentically, a computed tomography pebble flow detecting (CT-PFD) system has been constructed, in which a three-dimensional model is simulated according to the ratio of 1 : 5 with the core of HTR-PM. A multislice helical CT is utilized to acquire the reconstructed cross-sectional images of simulated pebbles, among which special tracer pebbles are designed to indicate pebble flow. Tracer pebbles can be recognized from many other background pebbles because of their heavy kernels that can be resolved in CT images. The detecting principle and design parameters of the system were demonstrated by a verification experiment on an existing CT system in this paper. Algorithms to automatically locate the three-dimensional coordinates of tracer pebbles and to rebuild the trajectory of each tracer pebble were presented and verified. The proposed pebble-detecting and tracking technique described in this paper will be implemented in the near future.

scholarly journals A Cross-Sectional Study to Evaluate the Effects of Age and Duration of HIV Infection on Anxiety and Depression in Cisgender Men

2021 ◽  
Author(s):  
Sara Gianella ◽  
Rowan Saloner ◽  
Genevieve Curtin ◽  
Susan J. Little ◽  
Anne Heaton ◽  
...  
Keyword(s):  
Hiv Infection ◽  
Small Sample Size ◽  
Cross Sectional Study ◽  
Small Sample ◽  
Self Report ◽  
Anxiety And Depression ◽  
Depression And Anxiety ◽  
Sectional Study ◽  
Cross Sectional ◽  
Study Results

AbstractThis observational cross-sectional study of 152 people with HIV (PWH) examined the effects of age and estimated duration of HIV infection (EDI) on depressive and anxiety symptoms. All participants were cisgender men and completed the Profile of Moods State (POMS), a self-report inventory of current (i.e., past week) mood states. Overall, study results confirmed higher levels of anxiety and depression in PWH compared to individuals without HIV. Age group (< 50 or ≥ 50 years) moderated the effect of EDI (< 3 or ≥ 3 years) on mood disturbance. Specifically, younger PWH with early diagnosed infection exhibited the highest levels of depression and anxiety, whereas depression and anxiety were attenuated in older PWH with early infection such that their POMS scores did not significantly differ from the HIV-negative and chronically HIV-infected groups. Despite the small sample size and other important limitations in our study design, our preliminary findings confirm previous observations that older people may have some adaptive ability to better handle the acute psychological stressors associated with recent HIV infection.

Perceptions and Understanding of Diabetes Mellitus Technology in Adults with Type 1 or Type 2 DM: A Pilot Survey from Pakistan

2021 ◽  
pp. 193229682110111
Author(s):  
Sarah Nadeem ◽  
Uswah Siddiqi ◽  
Russell Seth Martins ◽  
Kaleemullah Badini
Keyword(s):  
Diabetes Mellitus ◽  
Pilot Study ◽  
Diabetes Care ◽  
Online Survey ◽  
Small Sample Size ◽  
Developed Countries ◽  
Small Sample ◽  
Cost Of Care ◽  
Cross Sectional ◽  
Specific Patient

Introduction: Diabetes mellitus technology (DMT) is increasingly used for routine management in developed countries, yet its uptake in developing countries is not as consistent. Multiple factors may influence this, including country specific patient perception regarding DMT. We conducted a pilot study in Pakistan to understand this important question which has not been studied yet. Methods: A cross-sectional pilot study was conducted in Pakistan. An anonymous survey exploring perceptions of diabetes technology was circulated on social media platforms, collecting responses over 2 weeks. Target population included adults (≥18 years) living in Pakistan, with DM1 or 2. Results: A total of 40 responses were received. The majority (36/40) reported using conventional glucometers. Nine used continuous glucose monitoring (CGM). Thirty-two of 40 patients believed DMT improved diabetes care, 22 felt it helped decreased risk of Diabetes-related complications. 15/40 stated that DMT results in increased cost of care. Sixteen reported their diabetes care teams had never discussed wearable DMT options whereas 11 disliked them because they did not want a device on their self. Conclusion: In our pilot study we have identified broad themes of opportunity and challenges to DMT use in Pakistan. Patients’ perceptions regarding DMT were generally positive but significant barriers to its acceptance included high cost, lack of discussion between doctor and patient about available technology and personal hesitation. Limitations of our study include sampling bias (online survey) and small sample size, but this data can help inform larger studies, to look at this important topic in greater detail.

Intensity of perceived stress and control of anger, anxiety and depression of people staying in Polish penitentiary institutions

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Kinga Kołodziej ◽  
Anna Kurowska ◽  
Anna Majda
Keyword(s):  
Perceived Stress ◽  
Small Sample Size ◽  
Prison Population ◽  
Research Area ◽  
Cross Sectional Study ◽  
Small Sample ◽  
Emotional Control ◽  
Coping With Stress ◽  
Cross Sectional ◽  
Content Type

Purpose The purpose of this study is to assess the intensity of perceived stress and measure the subjective control of anxiety, anger and depression in a group of women and men staying in Polish penitentiary institutions. Design/methodology/approach The research was carried out in two penitentiary institutions located in the Lesser Poland Voivodeship at the turn of 2019/2020. The study group consisted of 152 prisoners. In the cross-sectional study, two standardised research tools – the Perceived Stress Scale and the Emotional Control Scale – were used. Findings Over half of the prisoners (57.24%) presented a high level of stress. The intensity of the perceived stress did not depend on the gender and age of the convicted persons. The general indicator of emotional control among the respondents averaged 51.82 points (standard deviation = 14.52) and ranged from 22 to 83 points, which means that people detained in penitentiary institutions suppressed their negative emotions at an average level. The prisoners had the best control over fear (M = 18.68), less over anger (M = 16.86) and the least over depression (M = 16.27). Statistical analysis showed a correlation between the level of emotional control and the intensity of perceived stress. Research limitations/implications The small sample size of the group participating in the study and narrowing of the research area means that results can not be generalised across all isolated prison population. Practical implications The results obtained from the study can be used by a multidisciplinary team to develop therapeutic programmes for convicted persons, the aim of which is to evaluate strategies for coping with stress and controlling emotions. Social implications Popularising reliable information related to the issue of experiencing stress and varied emotions in those staying in penitentiary institutions may lead to the elimination of harmful stereotypes functioning in society, as well as reduce the phenomenon of marginalisation of prisoners, and thus contribute to the success of the social rehabilitation process. Originality/value Research on the level of stress intensity in prisoners is important because the rates of mental health disorders among prisoners consistently exceed the rates of such disorders in the general population.

scholarly journals Italian Children’s Well-Being after Lockdown: Predictors of Psychopathological Symptoms in Times of COVID-19

2021 ◽  
Vol 18 (21) ◽  
pp. 11429
Author(s):  
Marcella Caputi ◽  
Barbara Forresi ◽  
Ludovica Giani ◽  
Giovanni Michelini ◽  
Simona Scaini
Keyword(s):  
Small Sample Size ◽  
Well Being ◽  
Small Sample ◽  
Novelty Seeking ◽  
Cross Sectional ◽  
Convenience Sample ◽  
Childhood Experiences ◽  
Adverse Experiences ◽  
Adverse Childhood ◽  
Cross Sectional Design

The first Italian lockdown imposed to fight the spread of COVID-19 caused important disruptions in families’ everyday lives. The main aim of this research was to investigate the predictors of psychopathology in children aged 5–10 years, immediately after the national 2-month lockdown. A total of 158 Italian parents (148 mothers, 10 fathers, mean age = 41 years) were recruited and asked to complete an online research concerning their 158 children (76 boys, mean age = 7.4 years). Parents completed questionnaires on parent–child conflict, resilience, temperament, behavior, and previous adverse childhood experiences. Hierarchical regressions showed that children’s psychopathology was predicted by low child resilience, high novelty seeking and harm avoidance, adverse experiences, and high flooding levels. Moreover, girls exposed to adverse experiences appeared more vulnerable to psychopathology. The recruitment of a convenience sample, the small sample size, and the cross-sectional design of our study limit the generalizability and interpretation of the present findings. Nonetheless, this research extends our knowledge of children’s functioning in such an exceptional period. Shedding light on predictors of children’s psychopathology following prolonged quarantine can indeed guide effective psychological interventions now and in future similar situations.

The Hyoid Bone in Malay Infants with Cleft Lip and Palate

2006 ◽  
Vol 43 (5) ◽  
pp. 532-538 ◽  
Author(s):  
Zainul A. Rajion ◽  
Grant C. Townsend ◽  
David J. Netherway ◽  
Peter J. Anderson ◽  
Toby Hughes ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cervical Spine ◽  
Software Package ◽  
Hyoid Bone ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Three Dimensional ◽  
Cross Sectional ◽  
Computed Tomography Scans ◽  
Age Range

Objective: To compare morphological and positional variations of the hyoid bone in unoperated infants with cleft lip and palate (CL/P) with those in noncleft infants. Design: Retrospective, cross sectional. Patients and Methods: Three-dimensional computed tomography scans were obtained from 29 unoperated CL/P infants of Malay origin aged between 0 and 12 months and from 12 noncleft infants in the same age range. Observations were made and measurements were obtained with a software package developed at the Australian Craniofacial Unit. The sizes of the hyoid bones and the position of the hyoid body and epiglottis in relation to the cervical spine were measured. Anatomical anomalies of the hyoid and prevalence of aspiration pneumonia were also documented. Results: The hyoid bones and epiglottis were found to be located more inferiorly in CL/P infants compared with the noncleft infants. Also, 17% (5/29) of the CL/P infants had nonossified hyoid bodies. Conclusion: The results suggest that there are differences in the location and genesis of the hyoid bone in infants with CL/P that warrant further investigation.

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