scholarly journals Preoperative estimate of natural ureteral length based on computed tomography and/or plain radiography

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jen-Ting Hsu ◽  
Jen-Shu Tseng ◽  
Marcelo Chen ◽  
Fang-Ju Sun ◽  
Chien-Wen Chen ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Multivariate Regression ◽  
Three Dimensional ◽  
Plain Radiography ◽  
Accurate Estimation ◽  
List Type ◽  
Multiplanar Reformation ◽  
Clinical Images ◽  
Clinical Scenarios ◽  
Computed Tomography Urography

AbstractTo predict natural ureter lengths based on clinical images. We reviewed our image database of patients who underwent multiphasic computed tomography urography from January 2019 to April 2020. Natural ureteral length (ULCTU) was measured using a three-dimensional curved multiplanar reformation technique. Patient parameters including age, height, and height of the lumbar spine, the index of ureteral length using kidney/ureter/bladder (KUB) radiographs (C-P and C-PS) and computed tomography (ULCT) were collected. ULCTU correlated most strongly with ULCT. R square and adjusted R square values from multivariate regression were 0.686 and 0.678 (left side) and 0.516 and 0.503 (right side), respectively. ULCTU could be estimated by the regression model in three different scenarios as follows: ULCT + C-P ULCTUL = 0.405 $$\times$$ × ULCTL$$+$$ + 0.626 $$\times$$ × C-PL – 0.508 cm ULCTUR = 0.558 $$\times$$ × ULCTR$$+$$ + 0.218 $$\times$$ × C-PR + 6.533 cm ULCT ULCTUL = 0.876 $$\times$$ × ULCTL$$+$$ + 6.337 cm ULCTUR = 0.710 $$\times$$ × ULCTR$$+$$ + 9.625 cm C-P ULCTUL = 0.678 $$\times$$ × C-PL$$+$$ + 4.836 cm ULCTUR = 0.495 $$\times$$ × C-PR$$+$$ + 10.353 cm We provide equations to predict ULCTU based on CT, KUB or CT plus KUB for different clinical scenarios. The formula based on CT plus KUB provided the most accurate estimation, while the others had lower validation values but could still meet clinical needs.

Anatomic Predictors of Formation of Lower Caliceal Calculi: Is It the Time for Three-Dimensional Computed Tomography Urography?

2008 ◽  
Vol 22 (9) ◽  
pp. 2175-2180 ◽  
Author(s):  
Ahmed El-Assmy ◽  
Mohamed E. Abo-Elghar ◽  
Ahmed R. El-Nahas ◽  
Ramy F. Youssef ◽  
Tarek El-Diasty ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Computed Tomography Urography

scholarly journals Application of Three-Dimensional Computed Tomography Improved the Interrater Reliability of the AO/OTA Classification Decision in a Patellar Fracture

2021 ◽  
Vol 10 (15) ◽  
pp. 3256
Author(s):  
Seong-Eun Byun ◽  
Oog-Jin Shon ◽  
Jae-Ang Sim ◽  
Yong-Bum Joo ◽  
Ji-Wan Kim ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Interrater Reliability ◽  
Three Dimensional ◽  
Treatment Recommendations ◽  
Ct Imaging ◽  
Plain Radiography ◽  
Imaging Modalities ◽  
Patellar Fracture ◽  
Patellar Fractures

We investigated whether interrater reliabilities of the AO/OTA classification of patellar fracture and treatment recommendations change with the imaging modalities applied, including plain radiography and two- and three-dimensional (2-D and 3-D) computed tomography (CT). Seven orthopedic specialists and four orthopedic residents completed a survey of 50 patellar fractures to classify the fractures according to the AO/OTA classification for patellar fractures. Initially, the survey was conducted using plain radiography only, then with 2-D CT introduced three weeks later and 3-D CT introduced six weeks later. Fleiss’ Kappa coefficients were calculated to determine interrater reliability, respectively. The overall interrater reliability of the AO/OTA classifications was 0.40 (95% CI, 0.38–0.42) with plain radiography only and 0.43 (95% CI, 0.41–0.45) with the addition of 2-D CT. With the addition of 3-D CT, the reliability was significantly improved to 0.54 (95% CI, 0.52–0.56). In specialists, interrater reliability of the classifications was moderate with all three imaging modalities. With the use of 3-D CT, interrater reliability of the classification was 0.53 (95% CI, 0.50–0.56), which was significantly higher than that with the use of 2-D CT (κ = 0.45; 95% CI, 0.42–0.48). In residents, interrater reliability of the classification was 0.30 (95% CI, 0.24–0.36) with plain radiography. The reliability improved to 0.49 (95% CI, 0.43–0.56) with the addition of 2-D CT, which was significantly higher than that with plain radiography only. The use of 3-D CT imaging improved interrater reliability of the classification. Therefore, surgeons, especially residents, may benefit from using 3-D CT imaging for classifying and planning the treatment of patellar fractures.

scholarly journals Clinical images: Three-dimensional computed tomography imaging of tophaceous gout

2006 ◽  
Vol 56 (1) ◽  
pp. 29-29 ◽  
Author(s):  
Nicola Dalbeth ◽  
Barnaby Clark ◽  
Kate Gregory ◽  
Timothy Sheehan ◽  
Fiona McQueen
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Computed Tomography Imaging ◽  
Tophaceous Gout ◽  
Clinical Images ◽  
Tomography Imaging

Progressive Patterns of Degenerative Arthritis in Scaphoid Nonunion Demonstrated by Three-Dimensional Computed Tomography

1998 ◽  
Vol 23 (6) ◽  
pp. 765-770 ◽  
Author(s):  
Y. HIDAKA ◽  
R. NAKAMURA
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Plain Radiography ◽  
Degenerative Changes ◽  
Distal Fragment ◽  
Scaphoid Nonunion ◽  
Degenerative Arthritis ◽  
Osteophyte Formation ◽  
Third Stage ◽  
X Ray Computed

Degenerative arthritis following scaphoid nonunion was studied in 28 patients (29 wrists) using X-ray computed tomography and three-dimensional computed tomography (3-DCT). Degenerative changes were observed in 18 wrists with plain radiography and 27 wrists with 3-DCT. 3-DCT imaging more readily revealed osteophyte formation in osteoarthritis than plain radiography. 3-DCT images showed degenerative changes in the distal fragment of the scaphoid earlier than plain radiography. We found three stages of osteophyte formation in the radioscaphoid joint using 3-DCT. In the first stage, a linear osteophyte formed along the most radial portion of the distal fragment of the scaphoid. In the second stage, the radial styloid became pointed. In the third stage, the osteophyte on the distal fragment enlarged and lay over the dorsum of the radioscaphoid joint and other intercarpal joints.

scholarly journals Sex assessment from the proximal femur in a Spanish population based on three-dimensional computed tomography metric analysis

2019 ◽  
Vol 76 (12) ◽  
pp. 1245-1252
Author(s):  
Mirjana Djorojevic ◽  
Concepción Roldán ◽  
Miguel Botella ◽  
Inmaculada Alemán
Keyword(s):  
Computed Tomography ◽  
Proximal Femur ◽  
Three Dimensional ◽  
Predictive Ability ◽  
3D Ct ◽  
Linear Measurements ◽  
Clinical Images ◽  
Disaster Victims ◽  
Vertical Diameter

Background/Aim. The studies published in recent years have shown that the linear measurements on the three-dimensional computed tomography (3D-CT) clinical images of the hip bone, skull or breastbone can serve as a reliable alternative method for sex estimation. In spite of the fact that the proximal femur exhibited high dimorphism when examining the skeletal material, there is still a lack of morphometric studies dealing with the CT imaging of this anatomical region that would confirm the relevance of the previously obtained results. The aim of this study was to validate the reliability and precision of some proximal femur measurements obtained in vivo from the 3D-CT models and to compare the accuracies of our findings with those formerly reported by other relevant research. Methods. A total of 146 CT scans (73 male and 73 females) were selected to take 6 measurements using the traditional osteometric methods. The 3D reconstruction was done at 1mm and 1.25 mm thick slices with OsiriX (v.4.1). The univariate and multivariate discriminant functions (DFs) were formulated for assessing sex. Results. The vertical diameter of neck and the vertical diameter of head were found to contribute the most when considered independently (90.4%?91.8%). When combining these with the other dimensions, the prediction accuracy increased up to 97.3%. The accuracy of CT measurements is in accordance with those obtained in the traditional morphometric studies on the skeletonized femurs of contemporary populations. The 3D-CT approach showed remarkably higher percentage of predictive ability in comparison with the 2D technique. Conclusion. 3D-CT is a suitable tool for the objective quantification of osteological data. The medical scans and measurements on living individuals offer a valuable source of data from which the highly reliable skeletal standards can be developed for estimating sex, even from the fragmented remains. The method proposed here can be highly useful especially in the identification of mass disaster victims when the direct osteometry is difficult to apply and maceration of the remains is not an option.

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