scholarly journals OC50: Gestational sac volume estimation using a novel method of volume assessment-Auto Volume Measurements (AVM-3D)

2007 ◽  
Vol 30 (4) ◽  
pp. 383-383
Author(s):  
M. Pietryga ◽  
A. J. Zawiejska ◽  
J. Brazert
Keyword(s):  
Volume Estimation ◽  
Volume Assessment ◽  
Volume Measurements ◽  
Novel Method ◽  
Gestational Sac

scholarly journals The Flaws and Future of Islet Volume Measurements

2018 ◽  
Vol 27 (7) ◽  
pp. 1017-1026 ◽  
Author(s):  
Han-Hung Huang ◽  
Stephen Harrington ◽  
Lisa Stehno-Bittel
Keyword(s):  
Large Range ◽  
Therapeutic Option ◽  
Lessons Learned ◽  
Volume Estimation ◽  
Improved Method ◽  
Islet Volume ◽  
Volume Measurements ◽  
History Of ◽  
Advance Research ◽  
Islet Transplants

When working with isolated islet preparations, measuring the volume of tissue is not a trivial matter. Islets come in a large range of sizes and are often contaminated with exocrine tissue. Many factors complicate the procedure, and yet knowledge of the islet volume is essential for predicting the success of an islet transplant or comparing experimental groups in the laboratory. In 1990, Ricordi presented the islet equivalency (IEQ), defined as one IEQ equaling a single spherical islet of 150 μm in diameter. The method for estimating IEQ was developed by visualizing islets in a microscope, estimating their diameter in 50 μm categories and calculating a total volume for the preparation. Shortly after its introduction, the IEQ was adopted as the standard method for islet volume measurements. It has helped to advance research in the field by providing a useful tool improving the reproducibility of islet research and eventually the success of clinical islet transplants. However, the accuracy of the IEQ method has been questioned for years and many alternatives have been proposed, but none have been able to replace the widespread use of the IEQ. This article reviews the history of the IEQ, and discusses the benefits and failings of the measurement. A thorough evaluation of alternatives for estimating islet volume is provided along with the steps needed to uniformly move to an improved method of islet volume estimation. The lessons learned from islet researchers may serve as a guide for other fields of regenerative medicine as cell clusters become a more attractive therapeutic option.

OP06.06: Volume measurements and morphological assessment of the gestational sac using VOCAL technique

2009 ◽  
Vol 34 (S1) ◽  
pp. 80-80
Author(s):  
K. Koterova ◽  
L. Krofta ◽  
I. Kucerova ◽  
H. Stefanovicova ◽  
L. Haakova
Keyword(s):  
Vocal Technique ◽  
Volume Measurements ◽  
Gestational Sac ◽  
Morphological Assessment

scholarly journals Mining Waste Volume Estimation Using Airborne Lidar Data and Historical Maps: A Case Study of Tailing Piles in Szklary, Lower Silesia

2021 ◽  
Vol 9 (1) ◽  
pp. 32
Author(s):  
Paweł Trybała ◽  
Wojciech Kaczan ◽  
Adam Górecki
Keyword(s):  
Mining Waste ◽  
Volume Estimation ◽  
Airborne Lidar ◽  
Novel Method ◽  
The Difference ◽  
Airborne Lidar Data ◽  
Waste Deposit ◽  
Lower Silesia ◽  
Potential Exploitation

Reliable feasibility analysis of potential exploitation of a mining waste deposit poses a great challenge. One of the most crucial parts of this process is the approximation of the deposit volume. In this case study we propose a novel method of tailing pile volume estimation using open remote sensing and cartographic data. For selected piles, the difference between the proposed and classical approach reach 50% of the pile volume, which is a significant change in the potential value of the deposit.

scholarly journals DietSkan: Food Volume Estimation for Dietary Intake Analysis Using 3D Mesh Scanning

2018 ◽  
Vol 7 (4.38) ◽  
pp. 1368
Author(s):  
Sep Makhsous ◽  
Jack Gentsch ◽  
Joshua Rollins ◽  
Zachary Feingold ◽  
Alexander Mamishev
Keyword(s):  
Dietary Intake ◽  
Smartphone Application ◽  
Volume Estimation ◽  
Volume Calculation ◽  
3D Mesh ◽  
3 Dimensional ◽  
Volume Measurements ◽  
Prevalence Of Obesity ◽  
Structure Sensor ◽  
Dietary Tracking

The prevalence of obesity, found in more than 38% of worldwide adults, is causing dietary measurements to become increasingly important. Most methods for tracking dietary intake utilize estimating the amount of food consumed to determine calories and nutritional content. Currently used methods of dietary tracking are either tedious or inaccurate. Our proposed method for dietary tracking is called DietSkan. It combines an off the shelf 3-Dimensional (3D) scanner, the Structure Sensor, with a smartphone application to produce a 3D reconstructed mesh scan of food items. The DietSkan process requires the desired food item to be scanned and exported for volume calculation. Then, using a 3D mesh manipulation tool, a 3D mesh, enclosing the consumed food, is constructed to obtain volume. The volume measurements achieved using the DietSkan algorithm average only 6% error and allow a user to track their dietary intake simply and effectively. The DietSkan system simplifies the estimation process and improves measurement accuracy when compared to current common practices.  

Accurate Volumetric Measurements of Anatomical Cavities

2004 ◽  
Vol 43 (04) ◽  
pp. 331-335 ◽  
Author(s):  
J. Orman ◽  
Ö. Gürvit ◽  
D. Bartz
Keyword(s):  
Volume Estimation ◽  
Special Treatment ◽  
3D Segmentation ◽  
Volumetric Assessment ◽  
Novel Method ◽  
Anatomical Objects ◽  
Biplane Angiography ◽  
Measured Volume ◽  
Volumetric Measurements

Summary Objectives: The volumetric assessment of anatomical cavities is of high relevance for various applications in medicine. Based on 3D scanning (i.e., CT) of these cavities, the volume can be determined by counting the volume elements of a segmentation of that cavity. Unfortunately, elements on the boundary of the segmentation require special treatment to obtain accurate volumetric measurements. In this paper, we propose a novel technique that in particular increases the accuracy of the volume estimation for the boundary elements of segmented anatomical objects. Methods: Based on a 3D segmentation of an anatomical cavity, we recursively subdivide boundary volume elements into a set of simple situations, where the volume can be estimated easily. Results: We performed volumetric measurements on seven datasets of phantom models made of plexiglass (see Fig. 1) scanned by a biplane angiography unit and assessed the quality of our method by comparing the measured volume by our novel method and by the fluid required to fill the phantom cavities. Conclusions: Our method calculates a significantly more accurate volume of the segmented cavities than previous methods. Nevertheless, it is only slightly more computationally expensive.

scholarly journals Intercontinental validation of brain volume measurements using MSmetrix

2017 ◽  
Vol 31 (2) ◽  
pp. 147-149 ◽  
Author(s):  
Alessandro Finkelsztejn ◽  
Yara Dadalti Fragoso ◽  
Eder Amaral Bastos ◽  
Juliana Avila Duarte ◽  
Juliana Santos Varela ◽  
...  
Keyword(s):  
Grey Matter ◽  
Brain Volume ◽  
Normal Population ◽  
Grey Matter Volume ◽  
Volume Data ◽  
Study Results ◽  
Volume Assessment ◽  
Volume Measurements ◽  
Different Populations

Background Brain volume assessment has become an important outcome within research and treatment of multiple sclerosis (MS). MSmetrix (Icometrix) has been developed specifically for patients with MS. The original healthy, ‘normal’ population used for determination of the acceptable brain volume data consisted mainly of Europeans. Methods In the present study, results from 295 completely normal magnetic resonance imaging scans from Brazilian subjects were plotted against the original results in MSmetrix. Results With regard to whole brain volume, only 2% of the healthy adult subjects from Brazil were below the 5th percentile of the graph, and for grey matter volume, only 3% of the subjects were below the 5th percentile of MSmetrix standards. Conclusion MSmetrix may be used across different populations.

scholarly journals THE IMPACT OF HARVESTER CALIBRATION ON THE ACCURACY OF BIRCH VENEER LOGS MEASUREMENTS BY MEASURING DIAMETER IN SHORT INTERVALS USING ELECTRONIC 3D SYSTEMS

2017 ◽  
Vol 3 ◽  
pp. 217
Author(s):  
Ziedonis Miklašēvičs
Keyword(s):  
Measurement System ◽  
Volume Measurement ◽  
Measurement Methods ◽  
Volume Estimation ◽  
Volume Determination ◽  
Short Intervals ◽  
Actual Volume ◽  
Volume Measurements ◽  
The Impact ◽  
Birch Veneer

Accurate calibration of the harvester head relies on accurate manual log measurements. According to the recommended calibration procedures as proposed by the harvester manufacturer the differences between the volume measurements from harvester measurement system and the caliper-and-tape system must be within ± 3% and harvester diameter measurements within ± 6mm of manual measurements in 80% cases. Requirements in Latvia stipulate that total volume measurement accuracy levels must be within ± 5% of actual volume if veneer or birch logs are being harvested, ± 3% if saw logs are being harvested and ± 10% if pulp wood or fire wood are being harvested. The purpose of this study is to assess the impact of harvester calibration on the accuracy of birch veneer logs measurements by Measuring Diameter in Short Intervals using electronic 3D systems when different double bark volume determination algorithm are used in harvester and stacionar measurement system. The research was carried out in December 2016 in the region Latgale in Latvia. The wood felling area was chosen - Mercurialiosa mel. For volume estimation the sequent measurement equipment were applied: harvester Ponsse ERGO 8W, harvester information system Opti 4G and electronic 3D scanner system Elmes 3600. The research is a continuation to the work done in the project „Harmonisation of piece-by-piece measurement methods of roundwood approved by Standard LVS 82:2003 „Apaļo kokmateriālu uzmērīšana” [6], the project “Harmonization of piece-by-piece measurement methods in all stages of roundwood manufacturing processes” [7] and the project "Investigation and evaluation of the methodology of determination of solid volume according to the stacked volume on roadside and in forwarder loads for logistics purposes in LATVIA" [8].

scholarly journals Computerized Enumeration and Bio-volume Estimation of the Cyanobacteria Anabaena flos-aquae

2016 ◽  
Vol 2 (1) ◽  
Author(s):  
Chao Jin ◽  
Maria Mesquita ◽  
Monica Emelko ◽  
Alexander Wong
Keyword(s):  
Cell Model ◽  
Global Climate ◽  
Animal Health ◽  
Unsupervised Classification ◽  
Water Quality Monitoring ◽  
Volume Estimation ◽  
Target Cells ◽  
Integrated Method ◽  
Volume Assessment ◽  
Multicellular Organisms

One of the most noticeable consequences of global climate change is the increased occurrence of algae and cyanobacteria blooms in surface waters. Some of these organisms may release hazardous toxins which represent a threat for human and animal health worldwide. Accordingly, the identification of threshold levels of toxic cyanobacteria cells has become common practice to ensure successful water management. The majority of current methods for cyanobacteria enumeration and bio-volume assessment are very time-consuming and costly. Furthermore, when dealing with multicellular organisms (i.e., filaments, colonies, agglomerates etc.), none of the existing enumeration methods can achieve good accuracy and all tend to underestimate cell concentrations and bio-volume. In this study, we introduce an integrated method for automated enumeration and bio-volume estimation of Anabaena flos-aquae, a common filamentous species of cyanobacteria often present in water blooms. Since Anabaena filaments are often long and tangled, a sample of its culture was first sonicated to isolate individual cells, and then imaged while being excited by a 546nm light source to considerably improve contrast. A probabilistic unsupervised classification was introduced to detect the target cells, and the size distribution of the cells was used for model calibration. Using this learned cell model, subsequent samples with natural Anabaena filaments were automatically enumerated and the bio-volume estimated. Compared to traditional manual enumeration using a hemacytometer, the developed method achieved equivalent accuracy in much less time, with less resources, and provided additional bio-volume information. These preliminary results demonstrate the potential of the developed method as a robust tool for water quality monitoring.

Gestational sac fluid volume measurements in virtual reality

2011 ◽  
Vol 38 (5) ◽  
pp. 524-529 ◽  
Author(s):  
M. Rousian ◽  
A. H. J. Koning ◽  
W. C. Hop ◽  
P. J. van der Spek ◽  
N. Exalto ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Fluid Volume ◽  
Volume Measurements ◽  
Gestational Sac
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