Intra-observer and inter-observer errors in CT measurement of torsional profiles of lower limbs: a retrospective comparative study

Panou, Artemisia; Stanitski, Dedorah Faith; Stanitski, Carl L.; Peccati, Andrea; Portinaro, Nicola

doi:10.1186/s13018-015-0200-1

Cited by 8 publications

(4 citation statements)

References 11 publications

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“…Sinus CT scans are an integral part of preoperative planning. The important structures in planning sinus surgery are insertion of middle turbinate and the uncinated process, the location of anterior ethmoidal artery, and Keros class, Infraorbital cells, position of the Agger nasi cell, and the anatomical variants located in the operative area [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Inter-observer agreement of paranasal sinus computed tomography scans

Julkunen

Terna

Numminen

et al. 2016

Acta Oto-Laryngologica

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Section: Introductionmentioning

confidence: 99%

“…Particularly there have been major differences between an experienced observer and an inexperienced observer [8,11]. However, a study of shoulder CT scans showed that there can also be differences between equally experienced observers [12].…”

Section: Introductionmentioning

confidence: 99%

Inter-observer agreement of paranasal sinus computed tomography scans

Julkunen

Terna

Numminen

et al. 2016

Acta Oto-Laryngologica

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“…In the present study, we did not analyze the inter-observer and intra-observer errors. However, two experienced researchers with such image assessment (two surgeons) were involved in order to reduce these errors [ 17 ]. We could not analyze the parity of the women (nulliparous or multiparous) included, and this is the limitation of the study.…”

Section: Discussionmentioning

confidence: 99%

Width of pubic symphysis relating to age and sex in Koreans

Hwang

Park

2021

J Orthop Surg Res

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Introduction Diastasis of the pubic symphysis has been reported to occur in 13–16% of pelvic ring injuries. In Asians, there are only a few data showing the width of the pubic symphysis. The aim of this study is to see the width of pubic symphysis relating to age and sex in Koreans. Methods Width of pubic symphysis was measured in pelvis AP and pelvic CT of 784 peoples (392 males, 392 females). Results In supine AP, the width at the upper end was 4.8±2.5 mm (males; 3.46±1.38 mm, females; 4.04±2.76 mm). The width at the midpoint was 4.7±2.0 mm (males; 4.64±1.58 mm, females; 4.75±2.29 mm). The width at the lower end was 4.8±2.5 mm (males; 4.58±2.19 mm, females; 5.08±2.76 mm). In abducted AP, the width at the upper end was 3.8±2.9 mm (males; 3.65±1.50 mm, females; 3.97±3.85 mm). The width at the midpoint was 4.6±2.3 mm (males; 4.45±2.16 mm, females; 5.18±3.79 mm). The width at the lower end was 4.8±3.1 mm (males; 4.55±1.30 mm, females; 4.74±3.06 mm). In axial CT, the width at the anterior border was 15.0±6.2 mm (males; 14.50±6.62 mm, females; 16.44±6.22 mm). The width at the narrowest point was 3.1±1.5 mm (males; 3.19±1.53 mm, females; 3.09±1.50 mm). The width at the widest point was 4.1±1.6 mm (males; 4.27±1.60 mm, females; 4.00±1.50 mm). The width at the posterior border was 2.3±1.3 mm (males: 2.20±1.30 mm, females; 2.44±1.40 mm). Axial thickness was 27.1±5.3 mm (males; 29.48±4.60 mm, females; 24.70±4.82 mm). In coronal CT, the width at the upper end was 3.1±4.1 mm (males; 2.28±1.26 mm, females; 3.83±5.48 mm). The width at beginning of widening was 3.6±4.5 mm (males; 2.68±1.63 mm, females; 4.54±6.08 mm). The width at the lower end was 20.5±8.2 mm (males; 17.49±4.53 mm, females; 23.60±9.86 mm). Coronal thickness was 20.4±7.1 mm (males; 24.50±5.98 mm, females; 16.23±5.61 mm). In supine film, width significantly increased with age at the upper end (p=0.022) and midpoint (p< 0.001); however, it decreased at the lower end (p< 0.001). In abduction film, width at midpoint increased with age (p=0.003). Conclusion Pelvic malunion should be defined according to the population and age. These results could be a reference in assessing the quality of reduction after internal fixation of the patients with traumatic diastasis of the pubic symphysis.

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“…In human medicine, different diagnostic approaches such as clinical examination, 16,21 radiography, 13,22 computed tomography (CT), 12,[23][24][25] ultrasound, 26 and fluoroscopy 15,27 have been described for assessing TT. The accuracy of radiography 18 and CT 28 have been investigated in the first reports in veterinary medicine focusing on TT.…”

Section: Introductionmentioning

confidence: 99%

A three‐dimensional computed tomographic volume rendering methodology to measure the tibial torsion angle in dogs

Longo

Nicetto²,

Pozzi

et al. 2020

Veterinary Surgery

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Objective To describe a three‐dimensional (3D) computed tomographic (CT) methodology to measure the tibial torsion angle (TTa) and to evaluate intrarater and interrater agreements and accuracy through comparison with anatomic measurements. Study design Ex vivo cadaveric study. Sample population Thirty‐six tibiae from 18 dogs. Methods Tibial torsion angle of each tibia was measured by using two CT techniques (axial and 3D volume rendering) by three raters who blindly measured TTa in duplicate. A semitransparent bone filter was used to enhance the visibility of the target anatomical landmarks for the 3D volume rendering CT technique. Tibial torsion angle was also quantitated in tibial specimens. Intrarater and interrater agreements were analyzed by using intraclass coefficients (ICC). Accuracy was evaluated by using adjusted R2 coefficients (R2 > 80% was considered acceptable). Results The 3D volume rendering CT technique had excellent intrarater and interrater agreements (ICC > 0.94) and an R2 value of 97%. The axial CT technique had good to excellent intrarater and interrater agreements (0.8 < ICC < 0.95) and an R2 of 86%. No difference was found between axial and 3D CT techniques. A mean internal TT angle of approximately −6° was found with CT and anatomic measurements. Conclusion The 3D volume rendering and axial CT techniques were precise and accurate for measuring TTa in dogs unaffected by patellar luxation. Clinical relevance Combining 3D bone manipulation with application of a semitransparent filter allows simultaneous visualization of anatomic landmarks, which may facilitate the evaluation of complex bone deformations. Internal tibial torsion may be present in nonchondrodystrophic dogs without patella luxation.

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Intra-observer and inter-observer errors in CT measurement of torsional profiles of lower limbs: a retrospective comparative study

Cited by 8 publications

References 11 publications

Inter-observer agreement of paranasal sinus computed tomography scans

Inter-observer agreement of paranasal sinus computed tomography scans

Width of pubic symphysis relating to age and sex in Koreans

A three‐dimensional computed tomographic volume rendering methodology to measure the tibial torsion angle in dogs

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