BACKGROUND: Computerized tomography (CT) is the gold standard technique for tibial torsion assessment. In conclusion, MRI provides an alternative to CT in the measurement of femoral and tibial torsion. Correlations for both TPAT (R(2)=14%) and Arc midpoint (R(2)=39%) with CT-scan measurements of FNA were limited. Tibial torsion calculated by computerised tomography and compared to other methods of measurement J Bone Joint Surg Br , 62 ( 1980 ) , p. 238 , 10.1302/0301-620x.62b2.7364840 Biplanar radiography entails considerably less radia-tion exposure than CT and allows measure-ment with the patient in an upright weight-bearing position [29, 30]. Tibiofibular torsion was also measured using computed tomography (CT). Abnormal tibial torsion is a common pediatric problem, and there are many existing measurement methods. First, the only truly accurate determination of a postoperative difference in tibial torsion in any individual would be to obtain prefracture CT scans of both legs, which is clearly not possible. Noninvasive methods to assess tibial torsion, although convenient and inexpensive, are highly inaccurate due to their subjectivity. For tibial torsion measurements using CT, the range was 8°–52° (mean, 27° ± 8.5°) for reader 1, and 4°–50° (mean, 26° ± 9.0°) for reader 2. With the exception of one measurement of femoral torsion, one measurement of tibial torsion and one measurement of femorotibial torsion, all EOS imaging measurements were within the 95% limits of agreement (the mean ± 1.96 SD). Mean differences between CT scan and biplanar radiographs are -1° for femoral torsion and -0,7° for tibial torsion. Average femoral antetorsion (CT-analogous method) was 10.4 degrees (average side difference = 4.6 degrees); average tibial torsion was 41.7 degrees (average side difference = 6.1 degrees). • Measure the Neck-Horizontal Angle (NH). The impact of tibial torsion measurements on gait analysis kinematics. CT measurement of tibial torsion is generally reported to be both accurate and reproducible , . A New Radiographic Measurement Method for Evaluation of Tibial Torsion: A Pilot Study in Adults. 4 Methods for Measurement of Tibial Torsion March 2001 examination table. 46 (4):469-476. . Femoral and tibial torsion were measured by both EOS imaging and three-dimensional computed tomography (3D CT) reconstruction. Bland-Altman plots were used to assess the differences in the femoral and tibial torsion measurements between the CT-based 3D modeling and EOS-based 3D modeling results (17,18). CT scan imaging of all subjects were performed at the same radiologic center. The goal of this study was to develop a method for computed tomographic (CT) measurement of tibial torsion, and to compare this technique with direct anatomic measurement of tibial torsion in cadaveric canine tibiae. The measurements are classically taken on superimposed axial slices between the tangent to the posterior tibial-plateau rim and the bimalleolar axis. Femoral anteversion refers to the orientation of the femoral neck in relation to the femoral condyles at the level of the knee.In most cases, the femoral neck is oriented anteriorly as compared to the femoral condyles. The ICC values for all measurements were greater than 0.800. Pathological tibial torsion is known to negatively influence the functionality of the lower extremity, and therefore, its assessment might play an important role. However, the normal range of measurements will vary according to the plane of image. Mean measurement differences between the two biplanar radiography readers were 3.4° (0.0°-11.0°) for femoral torsion and 3.9° (0.0°-15.0°) for tibial torsion. Paired hind limbs of 10 cadaveric dogs were mounted on a custom‐designed limb holding apparatus. Tibial Torsion measured by computed tomography. This was a diagnostic study, investigating the reliability of two methods to measure tibial torsion values using CT-scanograms. The angle formed by the second metatarsal ray and the tibial tuberosity gives the tibial rotation. Its accuracy is equal to that of cadaveric skeletal measurement. The average difference between the two methods was 4.9°±3.8 / … bimalleolar or transmalleolar axis: bisection of the tibial plafond, connecting the most protruding parts of the medial and lateral malleolus to measure tibiofibular torsion 5,6; Interpretation. Abstract We report a new method using computed tomography (CT) to measure femoral torsion more accurately in patients with cerebral palsy. Mean interreader differences at CT were 3.3° (0.0°-9.0°) for femoral and 3.0° (0.0°-10.0°) for tibial torsion. MRI enables one to orientate the slice along the axis of the femoral neck, thus obtaining a single cross-section of the entire neck. An initial screening test for tibial torsion can be performed with the patient supine. KEYWORDS: computer tomography (CT), fluoroscopy, measurement, Tibial torsion. Asimilar method is to measure the In conclusion, MRI provides an alternative to CT in the measurement of femoral and tibial torsion. MRI enables one to orientate the slice along the axis of the femoral neck, thus obtaining a single cross-section of the entire neck. Therefore, goniometric determination of tibial torsion can only be considered an estimate but not a precise measurement. The correlation coefficiency between 3D-CT and physical measurement methods was low. The ICC values for all measurements were greater than 0.800. a validated measurement method for the tibial torsion is required. Intraindividual rotational side differences >15° are considered abnormal 6,7. Asimilar method is to measure the 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. CT scans allow for precise measurement of the tibial torsion angle by accurately identifying anatomical landmarks in the proximal and distal portions of the tibia. This technique has several advantages compared with measurement on CT images. Normal values differ in regard to the imaging method and reference axes. measure the angle formed by an line from the lateral to the medial malleolus, and a second line from the lateral to the medial femoral condyles. The ICC values for measurements of femoral anteversion and tibial torsion using CT and MRI by both investigators are shown in Tables 1 and 2. The proportion of measurements strictly superior to 10° is 0% for femoral torsion and 5 % for tibial torsion. Mean differences between CT scan and biplanar radiographs are -1° for femoral torsion and -0,7° for tibial torsion. We present a new method for measuring tibial torsion using conventional radiographs. The influence of image plane on the measured have been described [ 1, 3, 5–11 ] . Regression analysis showed that only TMA and CT-scan measurement of external tibial torsion demonstrated good (R(2)=57%) correlation. The delay in normal physiologic reso-lution of torsion is primarily related to increased motor tone. Abnormal tibial torsion is a common pediatric problem, and there are many existing measurement methods. Intrareader agreement was assessed by the intraclass correlation coefficient (ICC) with two-way model and consistency type. Biomechanical considerations on a CT-based treatment-oriented classification in radius fractures. The mean differ-ence in femoral anteversion noted between time periods was 2.5 ± 0.19 (range 0 –10 ) for observer one and 2D measurement methods (a) proximal determination for both techniques (angle between red lines), (b) distal determination for technique 1, (c) distal determination for technique 2.—2D tibial torsion measures are calculated by the sum of angle between red lines in a plus angle between red lines in b for technique 1 and in c for technique 2 normal average = 0 to -10 degrees internal rotation during infancy (which gradually laterally rotates to 15 degrees external rotation during growth) In terms of the concurrent validity, the correlation coefficients (r) for the CT measurements were 0.62, 0.52, and 0.55. • Find the slice that best reveals the alignment of the femoral condyles. Secondarily, we look to correlate tibial anatomy with variations in hindfoot alignment and foot type, based on routine radiographic parameters, and to document the observed ranges of these anatomical measurements. correlates poorly with computed tomography(CT)measurements29,30. CONCLUSION: Goniometric methods do not significantly differ from the CT methods for determination of intraindividual torsional difference. This is an anthropometric study of proximal ... CT scan measurements are bone-specific and gives accurate values of required dimensions so that it … The proportion of measurements strictly superior to 10° is 0% for femoral torsion and 5 % for tibial torsion. This method may be … 3,29,45,46 A validated and repeatable method to assess tibial torsion using CT or MRI is lacking and must be generated. Acta Radiologica Diagnosis 25 (1984) Fasc 4. The goal of this study was to develop a method for computed tomographic (CT) measurement of tibial torsion, and to compare this technique with direct anatomic measurement of tibial torsion in cadaveric canine tibiae. 4 Methods for Measurement of Tibial Torsion March 2001 examination table. When depicting tibial torsion by physical examination, all three methods had substantial validity, but test reliability and validity were highest for TMA measurements. Assessment is performed with the patient in the prone position, CONCLUSION. Paired hind limbs of 10 cadaveric dogs were mounted on a custom‐designed limb holding apparatus. Femoral and tibial torsion measurements based on EOS imaging compared to 3D CT reconstruction measurements A new method for the measurement of tibial torsion using computerised transverse tomography is presented. Computed tomography (CT) frequently is used to determine torsional abnormalities. In the literature, there are few works regarding accuracy and reproducibility of CT for the measurement of femoral and tibial torsion. Radiographic measurement methods using standard radiographs [, 9] or uoroscopy [4 22] have proven to be inadequate, since their reproducibility is low. Results. Strong associations were found between EOS and CT values for both femoral torsion ( P = 0.93) and tibial torsion ( P = 0.89). With EOS, the ICC was 0.93 for femoral torsion and 0.86 for tibial torsion; corresponding values with CT were 0.90 and 0.92. The EOS system is a valid alternative to CT for lower-limb torsion measurement. A moderate association between increasing external tibial torsion and decreasing TNBA was found (ρ = −0.576, p < .0001).Weak relationships were found between external tibial torsion and varus tibiotalar tilt (ρ = … The average difference (±SD) between the two methods was 4.9°±3.8° and 5.5°±4.1°, respectively. current validity, the correlation coefficients (r) for the CT measurements were 0.62, 0.52, and 0.55. However, the normal range of measurements will vary according to the plane of image. The correlation coefficiency between 3D-CT and physical measurement methods was low. Femoral / tibial torsion was -6°–65° / +6°–51° for 3D models based on BPRs and -13°–59° / 4°–52° for CT measurements. Keywords:Torsional profiles, Intra-observer errors, CT measurements, Neck-shaft angle, Tibial torsion Background Lower extremity deformities in cerebral palsy (CP) in-clude increased femoral anteversion and tibial medial or lateral torsion. Bland-Altman plots were performed to evaluate the difference between femoral and tibial torsion measurements obtained by these two methods. The aim of this study was investigate the relationship between version and torsional abnormalities of the acetabulum, femur and tibia in patients with symptomatic FAI. Using CT, FPA showed a strong correlation with tibial torsion but very weak correlation with femoral torsion . Yan et al prospectively compared EOS imaging (a BPR system) and 3D CT reconstruction for measurement of tibial and femoral torsion in 18 adults (36 lower extremities) aged 24 … The goal of this study was to develop a method for computed tomographic (CT) measurement of tibial torsion, and to compare this technique with direct anatomic measurement of tibial torsion in cadaveric canine tibiae. Femoral and tibial torsion measurements in children using 3D models Mean interreader differences at CT were 3.3° (0.0°–9.0°) for femoral and 3.0° (0.0°–10.0°) for tibial torsion. There was no trend for larger intermethod differences with decreasing age of the children. Femoral and tibial torsion measurements obtained with 3D models based on biplanar radiographs are interchangeable with standard CT measurements in patients with osteoarthritis of the knee. Yan W, Xu X, Xu Q, Yan W, Sun Z, Jiang Q, et al. Jakob and coworkers 14 described a common sense method superimposing cuts across the proximal tibia and distal ankle joint. The range of CT measurements for femoral torsion was −6°–59° for reader 1 (mean (± SD), 25° ± 12.9° SD), and −13°–58° for reader 2 (mean, 24° ± 13.1°). • Measure the Condyle-Horizontal Angle (CH). In our study, 95% confidence interval are less than 3° in absolute value. The interreader ICC was 0.93-0.97. Stanford Libraries' official online search tool for books, media, journals, databases, government documents and more. tibial torsion measurements by use of 3D models based on biplanar radiographs. The ICC values for all measurements were greater than 0.800. Femoral and tibial torsion were -6°-65° and 6°-51° for 3D models based on biplanar radiography and -13°-59° and 4°-52° for CT measurements. MRI enables one to orientate the slice along the axis of the femoral neck, thus obtaining a single cross-section of the entire neck. Clinical evaluation in combination with radiological measurements is important in pre- and post-surgical assessment. Methods: Tibial torsion angle of each tibia was of CT measurement of femoral and tibial torsion torsion and lateral tibial torsion is indicated as (+). torsion and 3.9° (0.0°–15.0°) for tibial torsion. Classically, the thigh-foot axis is usedtoassesstibialrotation.Inreality,it is a composite measurement of a com-bination of tibial and hindfoot rotation in relation to the longitudinal axis of the thigh. Measurements indicated mean external tibial torsion of 29.2 ± 9.1˚ and TNBA of 35.2 ± 7.5˚ medial.Tibiotalar tilt ranged from 48˚ varus to 23.5˚ valgus. Intrareader agreement was statistically significant (P<0.001) for all measurements, with high ICCs. Measurement of Tibial Torsion: 3D-CT Reconstruction www.e-arm.org 675 RESULTS The descriptive statistics of the tibial torsion angle measured using 3D-CT In the measurement performed by Rater A, the mean and standard deviation of the tibial torsion angle were 12.71±9.39o and 12.73±8.73o in the first and the second In our study, 95% confidence interval are less than 3° in absolute value. This study compared two methods of tibial torsion assessment and proposed a new method, which could be of value in cases of abnormal fibular changes. focus on the tibial torsion and talar neck-body angle (TNBA). The ICC values for measurements of femoral anteversion and tibial torsion using CT and MRI by both investigators are shown in Tables 1 and 2. For tibial torsion, the average differences between CT scan measurements and biplanar radiographs measurement were - 0,7° (IC 95%, [-2,1;0,6]. KEYWORDS: computer tomography (CT), fluoroscopy, measurement, Tibial torsion. There was no significant relationship between the CT scan-biplanar radiographs difference and the degree of tibial torsion (correlation coefficient, Dr. Rome explains how to look for tibial torsion, or tibial rotation, with the knee at a 90 degree angle. Measurements To Be Made off of a CT Scanogram Femoral Anteversion • MEASURE RIGHT AND LEFT SIDES INDIVIDUALLY • Find the slice that best reveals the alignment of the femoral neck. 2017 Apr. Three therapists measured tibiofibular torsion and thigh-foot angle (TFA) goniometrically in 17 normal subjects, aged three to 24 years. The measurement of tibial torsion by CT has not been standardized. A systematic review was performed according to PRISMA guidelines using the EMBASE, MEDLINE, PubMed and Cochrane databases. Tibial Torsion Tibial Torsion Angle (Computed Tomography) External torsion of malleolar plane relative to proximal tibial condyles +25 to +55 degrees (see reference for method) Reference: Laasonen EM, Jokio P, Lindholm TS. The purpose of this study was to compare three methods of measuring tibial torsion for its evaluation: computed tomography, physical examination, Differences between testers for the goniometric measures were analyzed using a nonparametric analysis of variance. Based on computed tomography (CT), a range of reference values for femoral torsion (FT) and tibial torsion (TT) have historically been reported, which require standardization to optimize the significant intra- and inter-observer variability. tions explain why previous reports on tibial torsion in adults vary, on the average, from 14 to 24". Measurements obtained with 3D modeling based on low-dose biplanar radiographs were characterized by even greater interreader agreement with an ICC of 0.943 (95% CI, 0.886-0.971) for femoral measurements and an ICC of 0.959 (95% CI, 0.918-0.979) for tibial measurements. angles of various anthropometric measurement namely tibial torsion, proximal femur geometry, distal femur and proximal tibia dimensions etc. The goal of this study was to develop a method for computed tomographic (CT) measurement of tibial torsion, and to compare this technique with direct anatomic measurement of tibial torsion in cadaveric canine tibiae. Paired hind limbs of 10 cadaveric dogs were mounted on a custom‐designed limb holding apparatus. With the emerging possibilities in cross-sectional imaging, dierent computed tomography (CT)-based Scanners have become available for low-dose simultaneous acquisition of perpendicular biplanar radiographs. These scanners allow femoral and tibial torsion measurements by use of 3D models based on biplanar radiographs. This technique has several advantages compared with measurement on CT images. Skeletal Radiol. As such, a new method has to be developed to measure tibial torsion that is different from Jend’s established CT method (Jend et al., 1981) and Butler-Manuel’s ultrasound method (Butler-Manuel et … Sample population: Thirty-six tibiae from 18 dogs. Keywords: CT, femoral torsion, low-dose biplanar radiography, tibial torsion. When depicting tibial torsion by physical examination, all three methods had substantial validity, but test reliability and validity were highest for TMA measurements. Differences were between-17° and + 12° (figure 6). 3,29,45,46 A validated and repeatable method to assess tibial torsion using CT or MRI is lacking and must be generated. Correlations for both TPAT (R(2)=14%) and Arc midpoint (R(2)=39%) with CT-scan measurements of FNA were limited. Level of Evidence: Level I, diagnostic study. See also We compared the method with several clinical methods and with CT measurement in 44 lower extremities of 25 subjects. PMID: The purpose of this study was to determine errors in measurement of torsional profiles (TP) (torsional femoral angle, torsional tibial angle, and femoral ankle angle) among four orthopedic surgeons, experts, and non-experts in measurement, and the CT measurement of tibial torsion is generally reported to be both accurate and reproducible,. The measurements are classically taken on superimposed axial slices between the tangent to the posterior tibial-plateau rim and the bimalleolar axis. The best CT method for measuring femoral torsion remains debated. Computed tomography (CT) measurement of lower-limb torsion has been well validated and is widely used as the current reference standard . During recent years, methods based on CT have Table 1. The ICC values for measurements of femoral anteversion and tibial torsion using CT and MRI by both investigators are shown in Tables 1 and 2. The purpose of this study was to compare three methods of measuring tibial torsion for its evaluation: computed tomography, physical examination, and motion capture.

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