The Experts below are selected from a list of 264 Experts worldwide ranked by ideXlab platform
Juhoantti Junno - One of the best experts on this subject based on the ideXlab platform.
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body mass estimation from dimensions of the Fourth Lumbar Vertebra in middle aged finns
Legal Medicine, 2019Co-Authors: Niina Korpinen, Asla Keisu, Jaakko Niinimaki, Jaro Karppinen, Markku Niskanen, Juhoantti Junno, Petteri OuraAbstract:Abstract Although body mass is not a stable trait over the lifespan, information regarding body size assists the forensic identification of unknown individuals. In this study, we aimed to study the potential of using the Fourth Lumbar Vertebra (L4) for body mass estimation among contemporary Finns. Our sample comprised 1158 individuals from the Northern Finland Birth Cohort 1966 who had undergone measurements of body mass at age 31 and 46 and Lumbar magnetic resonance imaging (MRI) at age 46. MRI scans were used to measure the maximum and minimum widths, depths, and heights of the L4 body. Their means and sum were calculated together with Vertebral cross-sectional area (CSA) and volume. Ordinary least squares (OLS) and reduced major axis (RMA) regression was used to produce equations for body mass among the full sample (n = 1158) and among normal-weight individuals (n = 420). In our data, body mass was associated with all the L4 size parameters (R = 0.093–0.582, p ≤ 0.019 among the full sample; R = 0.243–0.696, p ≤ 0.002 among the normal-weight sample). RMA regression models seemed to fit the data better than OLS, with Vertebral CSA having the highest predictive value in body mass estimation. In the full sample, the lowest standard errors were 6.1% (95% prediction interval ±9.6 kg) and 7.1% (±9.1 kg) among men and women, respectively. In the normal-weight sample, the lowest errors were 4.9% (±6.9 kg) and 4.7% (±5.7 kg) among men and women, respectively. Our results indicate that L4 dimensions are potentially useful in body mass estimation, especially in cases with only the axial skeleton available.
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Estimation of stature from dimensions of the Fourth Lumbar Vertebra in contemporary middle-aged Finns.
Forensic science international, 2018Co-Authors: Petteri Oura, Niina Korpinen, Jaakko Niinimaki, Jaro Karppinen, Markku Niskanen, Juhoantti JunnoAbstract:Abstract Background Accurate stature estimation plays an essential role in the identification of unknown deceased individuals. For cases in which conventional methods of stature estimation are not applicable, we studied the stature estimation potential of the Fourth Lumbar Vertebra (L4) among a large living sample of representative contemporary Finns. We also generated stature estimation equations for the middle-aged Finnish population. Material and methods Our study population comprised the Northern Finland Birth Cohort 1966 for which Lumbar magnetic resonance imaging (MRI) scans and objective measurements of stature were available from midlife (n = 1358). After screening the MRI scans for Vertebral pathologies, we measured the maximum and minimum widths, depths and heights of the L4 body with high precision and reliability. We then calculated their sums and means together with approximations of Vertebral cross-sectional area and volume. By constructing simple and multiple linear regression models around the L4 parameters, we generated equations for stature prediction, and investigated their accuracy on the basis of the adjusted R squared (R2) and standard error of the estimate (SEE) values of the models. Results The multiple linear regression models of the mean width, depth and height of L4 yielded the highest prediction accuracies with the lowest prediction errors (for the entire sample, R2 = 0.621 and SEE = 5.635 cm; for men, R2 = 0.306 and SEE = 5.125 cm; for women, R2 = 0.367 and SEE = 4.640 cm). Conclusion When conventional methods for estimating stature are not applicable, the Lumbar Vertebrae may be utilized for this purpose. Relatively accurate stature estimates can be given on the basis of only L4 dimensions.
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Sex estimation from dimensions of the Fourth Lumbar Vertebra in Northern Finns of 20, 30, and 46 years of age.
Forensic science international, 2018Co-Authors: Petteri Oura, Jaakko Niinimaki, Jaro Karppinen, Juhoantti JunnoAbstract:Abstract Background Accurate sex estimation (sexing) is crucial for successful forensic identification. For the cases in which only a part of the skeleton or individual skeletal elements are available, we investigated the sex estimation potential of the Fourth Lumbar Vertebra (L4) among 20-, 30-, and 46-year-old Northern Finns. Material and methods Magnetic resonance imaging scanned living subsamples of the Northern Finland Birth Cohort 1966 (scan at 46 years, n = 1363) and the Northern Finland Birth Cohort 1986 (repeated scans at 20 and 30 years, n = 375) provided the material for the study. After screening the scans for Vertebral pathologies, we measured the maximum and minimum widths, depths, and heights of the L4 body. The mean Vertebral width, depth and height were calculated together with Vertebral cross-sectional area and volume. Sex estimations were performed using univariate and multivariate logistic regression analysis. Results We detected marked sex discrepancy in all the studied parameters of L4 (p Conclusion Among 20-, 30-, and 46 year-old Finns, combining the measurements of width, depth, and height of the L4 body can be used to estimate sex with an accuracy of >80%. Vertebral width, depth, and height seem to yield as accurate sex estimates as more complicated Vertebral parameters.
H. Akan - One of the best experts on this subject based on the ideXlab platform.
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Quantitative assessment of the normal adult spinal canal at the Fourth Lumbar Vertebra by computed tomography
Neuroradiology, 1994Co-Authors: A. Senel, A. Tanik, H. AkanAbstract:We reviewed the computed tomographic (CT) studies of 105 adults with various complaints. Spinal canal diameters were measured by CT using both the conventional and Jones-Thomson (JT) techniques at the level of the Fourth Lumbar Vertebra. The data were statistically assessed in an attempt to define spinal stenosis.
Eiji Itoi - One of the best experts on this subject based on the ideXlab platform.
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Bilateral spondylolysis of inferior articular processes of the Fourth Lumbar Vertebra: a case report
Upsala journal of medical sciences, 2011Co-Authors: Tomoaki Koakutsu, Naoki Morozumi, Takeshi Hoshikawa, Shinji Ogawa, Yushin Ishii, Eiji ItoiAbstract:Lumbar spondylolysis, a well known cause of low back pain, usually affects the pars interarticularis of a lower Lumbar Vertebra and rarely involves the articular processes. We report a rare case of bilateral spondylolysis of inferior articular processes of L4 Vertebra that caused spinal canal stenosis with a significant segmental instability at L4/5 and scoliosis. A 31-year-old male who had suffered from low back pain since he was a teenager presented with numbness of the right lower leg and scoliosis. Plain X-rays revealed bilateral spondylolysis of inferior articular processes of L4, anterolisthesis of the L4 Vertebral body, and right lateral wedging of the L4/5 disc with compensatory scoliosis in the cephalad portion of the spine. MR images revealed spinal canal stenosis at the L4/5 disc level. Posterior Lumbar interbody fusion of the L4/5 was performed, and his symptoms were relieved.
Petteri Oura - One of the best experts on this subject based on the ideXlab platform.
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body mass estimation from dimensions of the Fourth Lumbar Vertebra in middle aged finns
Legal Medicine, 2019Co-Authors: Niina Korpinen, Asla Keisu, Jaakko Niinimaki, Jaro Karppinen, Markku Niskanen, Juhoantti Junno, Petteri OuraAbstract:Abstract Although body mass is not a stable trait over the lifespan, information regarding body size assists the forensic identification of unknown individuals. In this study, we aimed to study the potential of using the Fourth Lumbar Vertebra (L4) for body mass estimation among contemporary Finns. Our sample comprised 1158 individuals from the Northern Finland Birth Cohort 1966 who had undergone measurements of body mass at age 31 and 46 and Lumbar magnetic resonance imaging (MRI) at age 46. MRI scans were used to measure the maximum and minimum widths, depths, and heights of the L4 body. Their means and sum were calculated together with Vertebral cross-sectional area (CSA) and volume. Ordinary least squares (OLS) and reduced major axis (RMA) regression was used to produce equations for body mass among the full sample (n = 1158) and among normal-weight individuals (n = 420). In our data, body mass was associated with all the L4 size parameters (R = 0.093–0.582, p ≤ 0.019 among the full sample; R = 0.243–0.696, p ≤ 0.002 among the normal-weight sample). RMA regression models seemed to fit the data better than OLS, with Vertebral CSA having the highest predictive value in body mass estimation. In the full sample, the lowest standard errors were 6.1% (95% prediction interval ±9.6 kg) and 7.1% (±9.1 kg) among men and women, respectively. In the normal-weight sample, the lowest errors were 4.9% (±6.9 kg) and 4.7% (±5.7 kg) among men and women, respectively. Our results indicate that L4 dimensions are potentially useful in body mass estimation, especially in cases with only the axial skeleton available.
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Estimation of stature from dimensions of the Fourth Lumbar Vertebra in contemporary middle-aged Finns.
Forensic science international, 2018Co-Authors: Petteri Oura, Niina Korpinen, Jaakko Niinimaki, Jaro Karppinen, Markku Niskanen, Juhoantti JunnoAbstract:Abstract Background Accurate stature estimation plays an essential role in the identification of unknown deceased individuals. For cases in which conventional methods of stature estimation are not applicable, we studied the stature estimation potential of the Fourth Lumbar Vertebra (L4) among a large living sample of representative contemporary Finns. We also generated stature estimation equations for the middle-aged Finnish population. Material and methods Our study population comprised the Northern Finland Birth Cohort 1966 for which Lumbar magnetic resonance imaging (MRI) scans and objective measurements of stature were available from midlife (n = 1358). After screening the MRI scans for Vertebral pathologies, we measured the maximum and minimum widths, depths and heights of the L4 body with high precision and reliability. We then calculated their sums and means together with approximations of Vertebral cross-sectional area and volume. By constructing simple and multiple linear regression models around the L4 parameters, we generated equations for stature prediction, and investigated their accuracy on the basis of the adjusted R squared (R2) and standard error of the estimate (SEE) values of the models. Results The multiple linear regression models of the mean width, depth and height of L4 yielded the highest prediction accuracies with the lowest prediction errors (for the entire sample, R2 = 0.621 and SEE = 5.635 cm; for men, R2 = 0.306 and SEE = 5.125 cm; for women, R2 = 0.367 and SEE = 4.640 cm). Conclusion When conventional methods for estimating stature are not applicable, the Lumbar Vertebrae may be utilized for this purpose. Relatively accurate stature estimates can be given on the basis of only L4 dimensions.
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Sex estimation from dimensions of the Fourth Lumbar Vertebra in Northern Finns of 20, 30, and 46 years of age.
Forensic science international, 2018Co-Authors: Petteri Oura, Jaakko Niinimaki, Jaro Karppinen, Juhoantti JunnoAbstract:Abstract Background Accurate sex estimation (sexing) is crucial for successful forensic identification. For the cases in which only a part of the skeleton or individual skeletal elements are available, we investigated the sex estimation potential of the Fourth Lumbar Vertebra (L4) among 20-, 30-, and 46-year-old Northern Finns. Material and methods Magnetic resonance imaging scanned living subsamples of the Northern Finland Birth Cohort 1966 (scan at 46 years, n = 1363) and the Northern Finland Birth Cohort 1986 (repeated scans at 20 and 30 years, n = 375) provided the material for the study. After screening the scans for Vertebral pathologies, we measured the maximum and minimum widths, depths, and heights of the L4 body. The mean Vertebral width, depth and height were calculated together with Vertebral cross-sectional area and volume. Sex estimations were performed using univariate and multivariate logistic regression analysis. Results We detected marked sex discrepancy in all the studied parameters of L4 (p Conclusion Among 20-, 30-, and 46 year-old Finns, combining the measurements of width, depth, and height of the L4 body can be used to estimate sex with an accuracy of >80%. Vertebral width, depth, and height seem to yield as accurate sex estimates as more complicated Vertebral parameters.
Xiangbo Kong - One of the best experts on this subject based on the ideXlab platform.
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percutaneous nephrolithotomy versus ureteroscopic lithotomy for large 15 mm impacted upper ureteral stones in different locations is the upper border of the Fourth Lumbar Vertebra a good indication for choice of management method
Journal of Endourology, 2013Co-Authors: Yang Jiang, Muchun Zhang, Wei Huo, Xiangbo KongAbstract:Abstract To determine whether treatment of patients with large (>15 mm) impacted upper ureteral stones depended on stone location, we prospectively evaluated the therapeutic outcomes, complications, safety, and effectiveness of percutaneous nephrolithotomy (PCNL) and ureteroscopic lithotomy (URSL) in patients with stones higher and lower than the upper border of the Fourth Lumbar Vertebra. Of the 174 patients analyzed, 83 (47.7%) underwent PCNL and 91 (52.3%) underwent URSL; all patients were followed up 1 month later and every 6 months for 18 months. Mean operation time (108.76±19.36 vs. 63.56±16.38 minutes, p<0.05) and postoperative hospital stay (2.49±1.23 vs. 5.36±1.98 days, p<0.05) were significantly longer in the PCNL than in the URSL group. The overall stone-free rates after 1 month were 96.4% and 75.8%, respectively, differing significantly for stones higher (97.8% vs. 57.5%, p<0.05) but not lower (94.7% vs. 90.2%) than the upper border of the Fourth Lumbar Vertebra. The stone-retropulsion rate of...
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Percutaneous Nephrolithotomy Versus Ureteroscopic Lithotomy for Large (>15 mm) Impacted Upper Ureteral Stones in Different Locations: Is the Upper Border of the Fourth Lumbar Vertebra a Good Indication for Choice of Management Method?
Journal of endourology, 2013Co-Authors: Yang Jiang, Muchun Zhang, Wei Huo, Xiangbo KongAbstract:Abstract To determine whether treatment of patients with large (>15 mm) impacted upper ureteral stones depended on stone location, we prospectively evaluated the therapeutic outcomes, complications, safety, and effectiveness of percutaneous nephrolithotomy (PCNL) and ureteroscopic lithotomy (URSL) in patients with stones higher and lower than the upper border of the Fourth Lumbar Vertebra. Of the 174 patients analyzed, 83 (47.7%) underwent PCNL and 91 (52.3%) underwent URSL; all patients were followed up 1 month later and every 6 months for 18 months. Mean operation time (108.76±19.36 vs. 63.56±16.38 minutes, p
