3D-MSCT imaging of bullet trajectory in 3D crime scene reconstruction: Two case reports

Colard, Thomas; Delannoy, Yann; Bresson, François; Maréchal, Christophe; Raul, Jean‐Sébastien; Hédouin, V.

doi:10.1016/j.legalmed.2013.07.002

Cited by 30 publications

(21 citation statements)

References 16 publications

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“…This includes positioning of the traces and relevant ballistic evidence, like spend cartridge cases or bullets, trajectory estimation and representation, gunshot residues (GSR) samples as well as wound ballistic findings. However, the integration of wound ballistics findings into the scene needs a correct interpretation of gunshot wounds characteristics [1][2][3][4]. Because of the big variety of the existing ammunitions and firearms, the projectiles have different properties (energy, velocity, form, composition, etc.)…”

Section: Wound Ballistics In Forensic Medicinementioning

confidence: 99%

“…Because of the big variety of the existing ammunitions and firearms, the projectiles have different properties (energy, velocity, form, composition, etc.) and behave differently in the human body [2] creating different types of wounds [5][6][7]. The variability in terms of wounding is not only related to the penetration depth or the transfer of energy, but depends also on the deviation in soft tissues [8][9][10][11] as well as on the deviation caused by the interaction with bones [12].…”

Section: Wound Ballistics In Forensic Medicinementioning

confidence: 99%

“…The leather (0.1 cm) was finally added in the front part of the model (Fig. 4 red Table 1 Thickness of the different tissues perforated or penetrated by the projectiles (1) Distance between the bone walls along the trajectory (2) Path length in the brain after the ricochet on the 2° bone wall (2) 0.4-0.…”

Section: The "Open Shape" Modelmentioning

confidence: 99%

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Practical application of synthetic head models in real ballistic cases

et al. 2021

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In shooting crimes, ballistics tests are often recommended in order to reproduce the wound characteristics of the involved persons. For this purpose, several “simulants” can be used. However, despite the efforts in the research of “surrogates” in the field of forensic ballistic, the development of synthetic models needs still to be improved through a validation process based on specific real caseworks. This study has been triggered by the findings observed during the autopsy performed on two victims killed in the same shooting incident, with similar wounding characteristics; namely two retained head shots with ricochet against the interior wall of the skull; both projectiles have been recovered during the autopsies after migration in the brain parenchyma. The thickness of the different tissues and structures along the bullets trajectories as well as the incident angles between the bullets paths and the skull walls have been measured and reproduced during the assemblage of the synthetic head models. Two different types of models (“open shape” and “spherical”) have been assembled using leather, polyurethane and gelatine to simulate respectively skin, bone and soft tissues. Six shots have been performed in total. The results of the models have been compared to the findings of post-mortem computed tomography (PMCT) and the autopsy findings.Out of the six shots, two perforated the models and four were retained. When the projectile was retained, the use of both models allowed reproducing the wounds characteristics observed on both victims in terms of penetration and ricochet behaviour. However, the projectiles recovered from the models showed less deformation than the bullets collected during the autopsies. The “open shape” model allowed a better controlling on the shooting parameters than the “spherical” model. Finally, the difference in bullet deformation could be caused by the choice of the bone simulant, which might under-represent either the strength or the density of the human bone. In our opinion, it would be worth to develop a new, more representative material for ballistic which simulates the human bone.

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Section: Wound Ballistics In Forensic Medicinementioning

confidence: 99%

Section: Wound Ballistics In Forensic Medicinementioning

confidence: 99%

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Practical application of synthetic head models in real ballistic cases

et al. 2021

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“…Ballistics Using the virtual autopsy approach, 3D imaging can assist forensic pathologists in providing an accurate and visual interpretation of a bullet trajectory. These techniques normally centre around CT and MRI scanning (Levy et al 2006;Folio et al 2011;Colard et al 2013), however studies have established that although this type of imaging is useful for understanding distribution, depth and direction of projectiles (Raneri 2018), it is also important to consider the initial autopsy examination as differences in interpretation may arise (Delteil et al 2018;Usui et al 2016). Likewise, photogrammetry has been used in the reconstruction of external bullet trajectories (Michienzi et al 2018) and in post-mortem surface documentation.…”

Section: 5mentioning

confidence: 99%

Imaging in forensic science: Five years on

Carew

Errickson

2019

Journal of Forensic Radiology and Imaging

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The Journal of Forensic Radiology and Imaging was launched in 2013 with the aim to collate the literature and demonstrate high-quality case studies on image-based modalities across the forensic sciences. Largely, the focus of this journal has been on the transmissive aspect of forensic imaging, and therefore a significant number of high-quality case studies have been published focusing on computed tomography and magnetic resonance imaging. As a result, the 'and imaging' aspect is often neglected. Since 2013, technology has fundamentally evolved, and a number of new techniques have become accessible or have been demonstrated as particularly useful within many sub-disciplines of forensic science. These include active and passive surface scanning techniques, and the availability of three-dimensional printing. Therefore, this article discusses non-contact techniques, their applications, advantages, and considerations on the current state of play of imaging in forensic science. HIGHLIGHTS • We discuss the application of 3D imaging within the context of forensic science. • We highlight the available documentation techniques assessing their advantages and disadvantages. • This article provides several recommendations for future best practice. 1. 'and imaging' aspect is often neglected, despite there being substantial overlap between reflective and transmissive techniques. Numerous forensic science sub-disciplines have utilised these imaging techniques often in an inter-disciplinary manner. These include, but are not limited to, anthropology, archaeology, odontology, crime scene investigation, footwear mark recovery and analysis, courtroom visualisation, and ballistic comparison. Given that these rapidly evolving techniques are situated within the changing face of forensic science, this article has collated the current developments

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“…It has been used in many diverse applications in the field, such as accident reconstruction and industry, etc. [5][6][7]. The close-range photogrammetry using consumer-grade digital camera typically consists of five steps: (1) The consumer-grade digital camera calibration through the special procedure; (2) Record at least two images; (3) Mark the corresponding points in two or more images; (4) Establish the relationship between the image coordinate and the world coordinate; (5) Produce the XYZ coordinate by inputting the image coordinates.…”

Section: 1recording 3d Information By Close-range Photogrammetrymentioning

confidence: 99%

A Novel Plan for Crime Scene Reconstruction

Liao¹

2015

Proceedings of the 5th International Conference on Computer Engineering and Networks — PoS(CENet2015)

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The traditional methods of registering crime scene, such as photographs, sketches, videos and oral descriptions, etc., are lowly efficient and couldn't meet the requirement. In this paper, a new method for crime scene reconstruction which combines the virtual reality techniques with efficient interaction is hereby proposed. The new techniques, such as close-range photogrammetry, panorama photography and crime scene virtual tour, are used for recoding and showing the complex crime scene. The case study shows it's a good way for analyzing crime scene.

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3D-MSCT imaging of bullet trajectory in 3D crime scene reconstruction: Two case reports

Cited by 30 publications

References 16 publications

Practical application of synthetic head models in real ballistic cases

Practical application of synthetic head models in real ballistic cases

Imaging in forensic science: Five years on

A Novel Plan for Crime Scene Reconstruction

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