OC23.01: Reference data representative of normal findings at 2D and 3D gray scale ultrasound examination of the cervix from 17 to 41 gestational weeks

At the 1977 meeting of the HFS a concept was presented for a Standard Ergonomics Reference Data System. The system would have two goals (1) the critical evaluation and integration of data from the existing published ergonomics literature, and (2) the development and application of standard measurement methods to collect key ergonomics data representative of the U.S. population not found in the published literature in a reliable form. This presentation will cover progress made in 1978 to assess user data needs and develop critical evaluation criteria, in light of significant overall program planning changes.

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ON THE VISUALIZATION OF POSITIONAL PRECISION

ISPRS Annals of Photogrammetry Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-annals-v-4-2021-75-2021 ◽

2021 ◽

Vol V-4-2021 ◽

pp. 75-81

Author(s):

J. Meidow

Keyword(s):

Reference Data ◽

Confidence Regions ◽

Plane Curves ◽

Conic Sections ◽

Distance Information ◽

Practical Applications ◽

Human Decision ◽

2D And 3D ◽

Positional Precision

Abstract. Tasks such as image registration or pose estimation require the determination of transformations based on uncertain observations. Hence, the position of any geometric object transformed according to this estimate is also uncertain, at least in terms of precision. Often the knowledge of uncertainty changes the judgment of individuals. Thus, the visualization of this information is crucial whenever a human decision-maker is involved. In the absence of error-free reference data, we consider the estimated precision as the probably most important quantity characterizing the uncertainty. This contribution focuses on the visualization of positional precision as provided by estimated covariance matrices. Basic design principles such as coloration and contouring in 2D and 3D are presented and discussed in the context of practical applications, e.g., the superimposition of distance information as seen nowadays in sports broadcasts. As a novel contribution, we propose quartic plane curves to represent the confidence regions of the loci of conic sections.

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Prediction of chronic endometritis using 2D and 3D transvaginal ultrasound examination in infertile women

International Journal of Reproduction Contraception Obstetrics and Gynecology ◽

10.18203/2320-1770.ijrcog20210701 ◽

2021 ◽

Vol 10 (3) ◽

pp. 865

Author(s):

Tamer H. Said

Keyword(s):

Ultrasound Examination ◽

Transvaginal Ultrasound ◽

Uterine Cavity ◽

Reproductive Age ◽

University Hospital ◽

Transvaginal Sonography ◽

Chronic Endometritis ◽

Infertile Women ◽

3D Ultrasonography ◽

2D And 3D

Background: Chronic endometritis is a pathology of continuous and hidden inflammatory process characterized by the infiltration of plasma cells into the endometrial stroma. Transvaginal bi-dimensional ultrasonography is in need to be evaluated in prediction of chronic endometritis in women with delayed pregnancy or infertility as a non-invasive, cheap, acceptable, and safe tool of diagnosis. Previously, 3D ultrasonography had been described as a novel for diagnosis of chronic endometritis and correlation of the images with hysteroscopic view results. Objectives were to predict the presence of chronic endometritis in infertile women during their reproductive age through examination of the uterine cavity by 2D and 3D transvaginal sonography to elicit proposed ultrasonographic signs of endometritis.Methods: This observational prospective study took place at Shatby university hospital, Alexanderia universtiy and was done on two hundred infertile women. Women were assigned for ultrasonographic evaluation as a part of pre-treatment assessment. Detailed history was taken from all the patients included in the study. General examination and routine laboratory investigations were done according to hospital protocol. All patients were asked to do ultrasound examination immediately postmenstrual and at the time of ovulation. We used 2D transvaginal ultrasound to predict chronic endometritis, we searched for 1) presence of persistent endometrial focal or diffuse thickening postmenstrual, 2) presence of focal echogenic foci in the triple line endometrium during ovulation. The 3D ultrasonography was done as confirmatory examination. Office hysteroscopy as the main method for diagnosis of endometritis was performed to all patients either after menses if the first sign was detected or at the time of ovulation if the second sign was detected.Results: The combination of persistent endometrial shreds and/or endometrial focal thickening or echogenicity can significantly predict presence of endometritis as the sensitivity and specificity of the combination were 94.90 and 81.37, respectively.Conclusions: Bi-dimensional ultrasonography done to infertile women at 2 phases of the menstrual period can predict the presence of chronic endometritis as a subtle cause of infertility and might be an indication for hysteroscopic evaluation for these patients.

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