Validation of the İşcan method in clinical MSCT scans specific to an Australian population

Błaszkowska, Magdalena; Flavel, Ambika; Franklin, Daniel

doi:10.1007/s00414-018-01992-0

Cited by 10 publications

(11 citation statements)

References 157 publications

(345 reference statements)

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“…CT scans can reduce working time because neither bone preparation nor dissection of the body is needed. The benefits of such an approach have been proven in Indian and Australian populations (Merritt 2018;Blaszkowska, Flavel, and Franklin 2019).…”

Section: Discussionmentioning

confidence: 99%

The Validity of Iscan’s Age Estimation Method applied to the Fourth Rib in a Thai Male population

Siriphimolwat¹,

Minsan²,

Mekjaidee³

2022

CMUJNS

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Iscan’s staging method for age estimation from fourth ribs has been proved to be a potentially useful tool for various populations. However, due to interracial variations, it is necessary to calibrate its’ accuracy in reference to a population of Thai males before it can be applied. This study aimed to evaluate the validity of phasing analyses of sternal ends of fourth ribs developed by Iscan, et al., on a Thai male population. The Iscan’s method was applied to 50 Thai males aged 18 years and above. Staging of sternal ends of the ribs was analyzed based on 3 morphological features: pit depth, pit shape, and rim and wall configurations – designated as components 1, 2, and 3, respectively. The data was analyzed using descriptive statistics, one-way ANOVA, and cross-tabulation with Kendall’s Tau-c correlation. It was found that sternal end stages of fourth ribs in each component, inclusive of composite scores, are positively correlated to the age of the individual (P < 0.001). However, Iscan’s result - which was derived from a population of white males - delivers age-underestimation in a Thai population. Hence, we developed a modified age prediction reference table for application to Thai males. Applying cross-tabulation analysis, stages 1 and 2 were found only in individuals who were less than 40 years old, and stages 4 and 5 were found only in the 40 years and above age-group except for 1 case. Keywords: Age estimation, Fourth rib, Iscan’s method, Thai male

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Section: Discussionmentioning

confidence: 99%

The Validity of Iscan’s Age Estimation Method applied to the Fourth Rib in a Thai Male population

Siriphimolwat¹,

Minsan²,

Mekjaidee³

2022

CMUJNS

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“…The accuracy attributed to age estimation using computed tomography (CT) has been validated through baseline studies (e.g. (8)(9)(10)(11)(12)(13)(14)(15)(16)). Recent research has applied the Suchey-Brooks method in the assessment of the symphysis in CT images (e.g.…”

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confidence: 99%

Quantification of Pubic Symphysis Metamorphosis Based on the Analysis of Clinical MDCT Scans in a Contemporary Malaysian Population

Hisham

Abdullah

Noor

et al. 2019

Journal of Forensic Sciences

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Forensic age estimation methods are biased to sex and population; in general, accuracy is reduced when applied to foreign populations. This study assessed the accuracy of the Suchey–Brooks method in contemporary Malaysian individuals and aimed to formulate population‐specific standards. Multi‐detector computed tomography scans of 355 individuals (165 male; 190 female) of 15–83 years of age were reconstructed using 3D‐volumetric rendering in RadiAnt. Pubic symphyseal phase, bias, inaccuracy, and percentage correct age classifications are examined. Transition analysis was used to develop age estimation standards. High observer agreement (κ = 0.763–0.832) and a positive relationship between age and pubic symphyseal phase (r = 0.884–0.90) were demonstrated. Mean inaccuracies were 8.62 and 8.95 years for males and females, respectively; overall correct classification was 97.8%. Transition ages between phases in males were 18.79, 23.29, 28.85, 43.64, and 61.15 years; in females, the corresponding data were 19.77, 22.53, 32.62, 41.85, and 57.39 years.

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“…Other works using CT scans obtained very similar figures to those obtained by Dedouit et al [ 42 ] and ours. Among them, two Australian studies with values of κ = 0.854 [ 43 ] and κ = 0.76 [ 44 ], and a recent study carried out in France ( κ = 0.85) [ 45 ] are of particular importance. In our study, we used a surface scanner, so despite the results not being fully generalizable, we can confidently state that they were in line with other studies as regard the use of 3D images.…”

Section: Discussionmentioning

confidence: 99%

Forensic age estimation: comparison and validation of the Iscan method in 3D reconstructions using a surface scanner in a Spanish population

et al. 2023

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When investigating a death, post-mortem identification provides with results of great legal and humanitarian significance. The effectiveness of the methods used to estimate age depends on the reference population, considering variables such as sex and ancestry. The aim of this study was to validate the Iscan method to estimate age in a Spanish forensic population, comparing the estimates obtained in dry bones and 3D reconstructions created with a surface scanner. We carried out a cross-sectional study on 109 autopsied corpses (67% male), scanning the sternal end of the right fourth rib in a 3D mesh, using an EinScan-Pro® surface scanner (precision: 0.05 mm). Two observers estimated the phases in dry bones and 3D images according to the Iscan method and to the sex of the subject. The mean age was 57.73 years (SD = 19.12 years;18–93 years). The intra-observer agreement was almost perfect in bones (κ = 0.877–0.960) and 3D images (κ = 0.954), while the inter-observer agreement was almost perfect in bones (κ = 0.813) and substantial in 3D images (κ = 0.727). The correlation with the Iscan phases was very strong in bones (Rho = 0.794–0.820; p < 0.001) and strong in 3D images (Rho = 0.690–0.691; p < 0.001). Both sex-adjusted linear regression models were significant (dry bones: R2 = 0.65; SEE = ± 11.264 years; 3D images: R2 = 0.50; SEE = ± 13.537 years) from phase 4 onwards. An overestimation of age was observed in the first phases, and an underestimation in the later ones. Virtual analysis using a surface scanner in the fourth rib is a valid means of estimating age. However, the error values and confidence intervals were considerable, so the joint use of different methods and anatomical sites is recommended.

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Validation of the İşcan method in clinical MSCT scans specific to an Australian population

Cited by 10 publications

References 157 publications

The Validity of Iscan’s Age Estimation Method applied to the Fourth Rib in a Thai Male population

The Validity of Iscan’s Age Estimation Method applied to the Fourth Rib in a Thai Male population

Quantification of Pubic Symphysis Metamorphosis Based on the Analysis of Clinical MDCT Scans in a Contemporary Malaysian Population

Forensic age estimation: comparison and validation of the Iscan method in 3D reconstructions using a surface scanner in a Spanish population

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