Patient-, software-, and observer-related factors associated with the time required for semi-automated measurements of the maxillary sinus volume using cone beam computed tomography (CBCT)

This study aimed to evaluate patient-, software-, and observer-related factors influencing the time required for volumetric measurements of maxillary sinuses using cone beam computed tomography (CBCT) and a commercially available software. The volumes of healthy bilateral maxillary sinuses of adult patients from CBCT images taken during a 15-month study period were measured using dedicated software by two observers. The time required for volumetric assessments was evaluated statistically with respect to the potential influence of gender, age, sinus side, sinus volume, sequence of measurement, and selection threshold of the software. The resulting average sinus volume of the 174 sinuses from 87 patients was 16.9 cm3. The average time required to measure one sinus volume was 91.8 s. Sinuses from male patients required a longer time (median of 95.5 s) for the measurements than their female counterparts (median of 87.5 s). Measurement time increased with increasing age, sinus volume and selection threshold based on calculated grey values provided by the software. The volumetric measurements and measurement times exhibited a high intra-observer agreement. The volumetric measurements were highly reproducible. Each measurement was completed within 4 minutes, though there was a marked difference in the mean measurement time between the two observers. Semi-automated volumetric measurement of the maxillary sinus with commercially available software is feasible, efficient, and reproduci...
Source: Schweizer Monatsschrift fur Zahnmedizin - Category: Dentistry Tags: Swiss Dent J Source Type: research

Related Links:

Conclusions: RME promotes a significant gain in the surface area of the palate and an increase in intermolar width. The Hyrax appliance was effective for the treatment of maxillary atresia in growing patients. There was no vertical alteration of the palate . After a 6-month retention period, the maxilla transverse dimension and the surface area of the palate remained stable.RESUMO Objetivo: o objetivo do presente estudo foi estimar a altera ção na área do palato após expansão rápida da maxila (ERM) com o expansor Hyrax em indivíduos em crescimento, utilizando tomografia comp...
Source: Dental Press Journal of Orthodontics - Category: Dentistry Source Type: research
ABSTRACT Objective: To assess the volume and morphology of the middle region of the pharynx (MRP) in adolescents with different anteroposterior craniofacial skeletal patterns. Methods: One hundred twenty-six patients (56 male and 70 female), who had cone-beam computed tomography (CBCT) within their records, were selected for this cross-sectional study. Participants were classified, according to their ANB angle value, in Class I (1o ≤ ANB ≤ 3o), Class II (ANB> 3o) and Class III (ANB 3o) e Classe III (ANB
Source: Dental Press Journal of Orthodontics - Category: Dentistry Source Type: research
Abstract A 27-year-old woman with sudden back pain was transported to our hospital. Abdominal ultrasonography revealed pregnancy of 28 weeks ’ gestation. Computed tomography demonstrated a type A aortic dissection. Because of progressive fetal deterioration, an emergency cesarean section was forced to perform. The next day, simple hysterectomy followed by an aortic procedure was completed. Valve-sparing aortic replacement and total arch replacement were employed as central operations. The mother and baby are well 9 months postoperatively. Although the strategy for acute type A aortic dissection during pregnancy is co...
Source: Revista Brasileira de Cirurgia Cardiovascular - Category: Cardiovascular & Thoracic Surgery Source Type: research
Publication date: November 2019Source: Mammalian Biology, Volume 99Author(s): John A. Nyakatura, Roxane Baumgarten, Daniel Baum, Heiko Stark, Dionisios YoulatosAbstractIn individuals of similar body mass representing closely related species with different lifestyles, muscle architectural properties can be assumed to reflect adaptation to differing, lifestyle-related functional demands. We here employ a fibre recognition algorithm on contrast-enhanced micro-computed tomography (μCT) scans of one specimen each of an arboreal (Sciurus vulgaris) and a fossorial (Spermophilus citellus) sciuromorph rodent. The automated appro...
Source: Mammalian Biology - Category: Biology Source Type: research
ConclusionThis case is a rare phenomenon in which the dead fetus remained in the uterus for a long time after a neglected obstructed labor and uterine rupture.
Source: Journal of Medical Case Reports - Category: General Medicine Source Type: research
Conclusion: We report a case of an encapsulated follicular variant of papillary thyroid carcinoma with unexpected metastasis to the lung 9 years after thyroid surgery in a patient who was initially diagnosed as follicular adenoma. A careful close follow-up with re-examination of the histopathology specimen may be needed in patients who were diagnosed with benign thyroid follicular tumors.
Source: Frontiers in Endocrinology - Category: Endocrinology Source Type: research
AbstractIn a case of a fatal traffic accident, a suspicious finding was identified in the muscular tissue of the left thigh by whole-body postmortem computed tomography. To better interpret the finding, the lower extremities were investigated by magnetic resonance imaging (MRI) and proton magnetic resonance spectroscopy (1H-MRS). MRI revealed the presence of an evenly distributed intramuscular fluid and1H-MRS of a volume within the fluid detected concentrations of acetate and lactate. The fluid was assumed to be an extravasation of an intraosseous infusion, erroneously administered to the intermediate vastus of the left th...
Source: International Journal of Legal Medicine - Category: Medical Law Source Type: research
ConclusionsClinical work-up is necessary to look for a cause of a spontaneous sublingual hematoma. Idiopathic spontaneous hematoma is only a rare entity. Aggressive airway management should be the first step in treatment. To date, there is no consensus about the management regarding the hematoma itself. Mostly, clinicians start with observation for spontaneous resolution of the hematoma and when possible to treat causative factors. Surgical drainage is performed when conservative treatment is not sufficient.
Source: Oral and Maxillofacial Surgery - Category: ENT & OMF Source Type: research
This study used a ligature ‐induced experimental periodontitis model to observe the kinetic process of microstructural changes in alveolar bone and introduced star volume analysis as a new methodology to assess microstructural changes. Thirty Wistar rats were used. To induce experimental periodontitis, ligatures were placed around the maxillary first molar. Rats were euthanized on days 0, 1, 3, 7, 14, and 28 after ligature placement. In addition to using hematoxylin and eosin staining, tartrate-resistant acid phosphatase (TRAP)/alkaline phosphatase (ALP) double staining, and micro-computed tomography were performed to an...
Source: Odontology - Category: Dentistry Source Type: research
The Pediatric Emergency Care Applied Research Network rule helps emergency physicians identify very low-risk children with minor head injury who can forgo head computed tomography. This rule contributes to reduction in lifetime risk of radiation-induced ca...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Age: Adolescents Source Type: news
More News: CT Scan | Dentistry | Statistics | Study | Switzerland Health