scholarly journals Novel Three-Dimensional Bladder Reconstruction Model from B-Mode Ultrasound Image to Improve the Accuracy of Bladder Volume Measurement

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4893
Author(s):  
Meng-Lin Chang ◽  
Hsiao-Chi Li ◽  
Chang-Keng Liu ◽  
Han-Sun Chiang ◽  
Chien-Chang Hsu
Keyword(s):  
Measurement Method ◽  
Three Dimensional ◽  
Volume Measurement ◽  
Bladder Volume ◽  
Percentage Error ◽  
Actual Volume ◽  
Bladder Reconstruction ◽  
The Mean ◽  
Ultrasonic Images ◽  
Reconstruction Model

Traditional bladder volume measurement from B-mode (two-dimensional) ultrasound has been found to produce inaccurate results, and thus in this work we aim to improve the accuracy of measurement from B-mode ultrasound. A total of 75 electronic medical records including ultrasonic images were reviewed retrospectively from 64 patients. We put forward a novel bladder volume measurement method, in which a three-dimensional (3D) reconstruction model was established from conventional two-dimensional (2D) ultrasonic images to estimate the bladder volume. The differences and relationships were analyzed among the actual volume, the traditional estimated volume, and the new reconstruction model estimated volume. We also compared the data in different volume groups from small volume to high volume. The mean actual volume is 531.8 mL and the standard deviation is 268.7 mL; the mean percentage error of traditional estimation is −28%. In our new bladder measurement method, the mean percentage error is −10.18% (N = 2), −4.72% (N = 3), −0.33% (N = 4), and 2.58% (N = 5). There is no significant difference between the actual volume and our new bladder measurement method (N = 4) in all data or the divided four groups. The estimated volumes from the traditional method or our new method are highly correlated with the actual volume. Our data show that the three-dimensional bladder reconstruction model provides an accurate measurement from conventional B-mode ultrasonic images compared with the traditional method. The accuracy is seen across different groups of volume, and thus we can conclude that this is a reliable and economical volume measurement model that can be applied in general software or in apps on mobile devices.

INTRA-RATER AND INTER-RATER RELIABILITY STUDY OF A MEASUREMENT METHOD FOR THE PATHWAY OF THE SUPRASPINATUS INTRAMUSCULAR TENDON BY 3.0 TESLA MRI IMAGES: THE SHEAR FORCE ANGLE ANTERIOR POSTERIOR

2018 ◽  
Vol 21 (02) ◽  
pp. 1850009
Author(s):  
Yohei Kanno ◽  
Hajime Toda ◽  
Tsutomu Horiuchi ◽  
Masaki Katayose
Keyword(s):  
Shear Force ◽  
Measurement Method ◽  
Intraclass Correlation ◽  
Three Dimensional ◽  
3D Models ◽  
Minimal Detectable Change ◽  
3.0 Tesla ◽  
Rater Reliability ◽  
The Mean ◽  
Anterior Posterior

Objective: The aim of this study was to establish intra-rater and inter-rater reliability of a measurement method for the pathway of the supraspinatus intramuscular tendon by 3.0 tesla MRI images. Methods: The scapula and intramuscular tendon extraction DICOM data was made to extract only a scapula domain and intramuscular tendon domain. The shear force angle anterior posterior (SFA-AP) was measured as the pathway of supraspinatus intramuscular tendon with respect to the glenoid plane on three-dimensional (3D) models of the bone and intramuscular tendon. SFA-AP of supraspinatus was measured on 3D models of the bone and intramuscular tendon. The mean and standard deviation of SFA-AP of supraspinatus was calculated. Intra-rater reliability and inter-rater reliability were evaluated by the intraclass correlation coefficient (ICC), the standard error of the mean (SEM) and the minimal detectable change (MDC). Inter-rater reliability was evaluated by three raters. Results: As for intra-rater reliability, SFA-AP of supraspinatus measured averaged [Formula: see text], with ICC (1,1) of 0.978, with ICC (1,3) of 0.993, with SEM of 0.53, with MDC of 1.46[Formula: see text]. As for inter-rater reliability, SFA-AP of supraspinatus measured averaged [Formula: see text] (rater1), SFA-AP measured averaged [Formula: see text] (rater2), SFA-AP measured averaged [Formula: see text] (rater3), with ICC (2,1) of 0.896, with ICC (2,3) of 0.963, with SEM of 1.11, with MDC of 3.09[Formula: see text]. Conclusions: 3D models of the bone and intramuscular tendon were evaluated as intra-rater and inter-rater reliabilities. SFA-AP of supraspinatus is guaranteed by one measurement.

Three-Dimensional Ultrasonographic Bladder Volume Measurement

2009 ◽  
Vol 28 (7) ◽  
pp. 847-854 ◽  
Author(s):  
Chitkasaem Suwanrath ◽  
Thitima Suntharasaj ◽  
Hemmasak Sirapatanapipat ◽  
Alan Geater
Keyword(s):  
Three Dimensional ◽  
Volume Measurement ◽  
Bladder Volume

scholarly journals P26.16: Reliability of three-dimensional ultrasound fetal urinary bladder volume measurement

2007 ◽  
Vol 30 (4) ◽  
pp. 551-551
Author(s):  
F. M. Peixoto-Filho ◽  
R. A. M. Sá ◽  
L. M. Lopes ◽  
L. G. C. Velarde ◽  
E. Marchiori ◽  
...  
Keyword(s):  
Urinary Bladder ◽  
Three Dimensional ◽  
Volume Measurement ◽  
Bladder Volume

Three-dimensional ultrasound fetal urinary bladder volume measurement: reliability of rotational (VOCALTM) technique using different steps of rotation

2007 ◽  
Vol 276 (4) ◽  
pp. 345-349 ◽  
Author(s):  
F. M. Peixoto-Filho ◽  
R. A. M. Sá ◽  
L. M. Lopes ◽  
L. G. C. Velarde ◽  
E. Marchiori ◽  
...  
Keyword(s):  
Urinary Bladder ◽  
Three Dimensional ◽  
Volume Measurement ◽  
Bladder Volume ◽  
Measurement Reliability

NON-INVASIVE TECHNIQUE FOR IN VIVO HUMAN EAR CANAL VOLUME MEASUREMENT

2012 ◽  
Vol 12 (04) ◽  
pp. 1250064 ◽  
Author(s):  
JEN-FANG YU ◽  
GO-LONG TSAI ◽  
CHUNG-CHIEH FAN ◽  
CHING-I CHEN ◽  
CHIA-CHI CHENG ◽  
...  
Keyword(s):  
Water Injection ◽  
Three Dimensional ◽  
Volume Measurement ◽  
Invasive Technique ◽  
Slice Thickness ◽  
High Resolution Computed Tomography ◽  
Two Dimensional Image ◽  
Non Invasive ◽  
The Mean

This prospective study is to develop a new non-invasive in vivo technique for the measurement of the human external auditory canal (EAC) volume using high resolution computed tomography (HRCT). Eighteen ears of nine male volunteers, with an age range of 20–30, were measured. The EAC volume was measured using three different methods: tympanometry, water injection, and HRCT. Two dimensional image slices of the EAC, in vivo, were obtained from the raw HRCT data. Each 2D CT image slice was composed of 512 × 512 pixels, with a 0.5 mm slice thickness, and a 0.175 × 0.175 × 0.5 mm3 voxel size. HRCT images were processed with Amira® software (Visage Imaging, Inc., San Diego, USA). Three-dimensional images of the EAC were reconstructed using an unconstrained smoothing mode. The resulting volume of the 3D model of the EAC was calculated using a voxel gate stacked tool. Using tympanometry, the mean measured EAC volume, averaged over all ears, was 766.66 mm3 (Standard Deviation, SD = 194.03 mm3). Using water injection, the mean measured EAC volume was 1102.77mm3 (SD = 121.60 mm3). Using HRCT, the mean measured EAC volume was 1082.22 mm3 (SD = 119.63 mm3). As evident from the SD values, variability was greater in the tympanometry group than in the water injection and HRCT groups. This study successfully developed a new technique to measure the EAC volume using HRCT imaging. This non-invasive technique for in vivo EAC volume measurement was less variable than tympanometry, and avoided the intrusive aspect of measurement by water injection. The technique allows effective, non-invasive assessment of the EAC volume pre-canalplasty, providing a predictor of EAC volume post-canalplasty.

Electron Holographic Nano-Characterization of Gold Catalyst at Interface

2002 ◽  
Vol 727 ◽  
Author(s):  
S. Ichikawa ◽  
T. Akita ◽  
M. Okumura ◽  
M. Haruta ◽  
K. Tanaka
Keyword(s):  
Contact Angle ◽  
Titanium Oxide ◽  
Gold Catalyst ◽  
Three Dimensional ◽  
High Resolution Electron Microscopy ◽  
Electron Holography ◽  
Gold Particles ◽  
Oxide Support ◽  
The Mean ◽  
A Charge

AbstractThe catalytic properties of nanostructured gold catalyst are known to depend on the size of the gold particles and to be activated when the size decreases to a few nanometers. We investigated the size dependence of the three-dimensional nanostructure on the mean inner potential of gold catalysts supported on titanium oxide using electron holography and high-resolution electron microscopy (HREM). The contact angle of the gold particles on the titanium oxide tended to be over 90° for gold particles with a size of over 5 nm, and below 90° for a size of below 2 nm. This decreasing change in the contact angle (morphology) acts to increase the perimeter and hence the area of the interface between the gold and titanium oxide support, which is considered to be an active site for CO oxidation. The mean inner potential of the gold particles also changed as their size decreased. The value of the inner potential of gold, which is approximately 25 V in bulk state, rose to over 40 V when the size of the gold particles was less than 2 nm. This phenomenon indicates the existence of a charge transfer at the interface between gold and titanium oxide. The 3-D structure change and the inner potential change should be attributed to the specific electronic structure at the interface, owing to both the “nano size effect” and the “hetero-interface effect.”

The Influence of Blade Wakes on the Performance of Interturbine Diffusers

1996 ◽  
Vol 118 (2) ◽  
pp. 347-352 ◽  
Author(s):  
R. G. Dominy ◽  
D. A. Kirkham
Keyword(s):  
Performance Modeling ◽  
Three Dimensional ◽  
Secondary Flows ◽  
Two Dimensional ◽  
Correct Performance ◽  
Analysis Methods ◽  
Flow Factor ◽  
The Mean ◽  
Lp Turbine

Interturbine diffusers provide continuity between HP and LP turbines while diffusing the flow upstream of the LP turbine. Increasing the mean turbine diameter offers the potential advantage of reducing the flow factor in the following stages, leading to increased efficiency. The flows associated with these interturbine diffusers differ from those in simple annular diffusers both as a consequence of their high-curvature S-shaped geometry and of the presence of wakes created by the upstream turbine. It is shown that even the simplest two-dimensional wakes result in significantly modified flows through such ducts. These introduce strong secondary flows demonstrating that fully three-dimensional, viscous analysis methods are essential for correct performance modeling.

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