Forensic imaging of projectiles using cone-beam computed tomography

In patients with gunshot injuries, it is easy to detect a projectile within the body due to the high-density of the object, but artefacts make it difficult to obtain information about the deformation and the exact location of the projectile in surrounding tissues. Cone-beam computed tomography (CBCT) is a new radiological imaging modality that allows radio-opaque objects to be localised and assessed in three dimensions. The full potential of the use of CBCT in forensic medicine has not yet been explored.In this study, three different modern projectiles were fired into the heads of pig cadavers (n = 6) under standardised conditions. Tissue destruction and the location of the projectiles were analysed separately using CBCT and multi-slice computed tomography (MDCT).The projectiles had the same kinetic energy but showed considerable differences in deformation behaviour. Within the study groups, tissue destruction was reproducible. CBCT is less severely affected by metallic artefacts than MDCT. Therefore CBCT is superior in visualising bone destruction in the immediate vicinity of the projectile and projectile deformation, whereas MDCT allows soft tissue to be evaluated in more detail.CBCT is an improved diagnostic tool for the evaluation of gunshot injuries. In particular, it is superior to MDCT in detecting structural hard-tissue damage in the immediate vicinity of high-density metal projectiles and in identifying the precise location of a projectile in the body.     

The problem of DNA contamination in forensic case work—How to get rid of unwanted DNA?

The PCR technique has become a powerful and very sensitive tool in a broad field of research, that is, molecular biology, medical diagnostics, population genetics, ancient DNA analysis and forensic casework.However, the high sensitivity down to single molecules can easily cause false-positive PCR results due to different types of contamination. In this study, artificial DNA contaminations (saliva and pure DNA) were treated with UV irradiation and other decontamination procedures. A satisfactory DNA removal could not be achieved, emphasizing the necessity of contamination avoidance.     

Towards a new quality of cooperation? The EU,China, and Central Asian Security in a Multipolar Age

Asia Europe Journal - Against the background of ever stronger linkages between the EU and China as well as their emphatically voiced objective to jointly shape the increasingly multi-polar world,...     

Orphan Living Situations in Malawi: A Comparison of Orphanages and Foster Homes

Orphans have become an increasingly large percentage of the population in Sub‐Saharan Africa due to the AIDS epidemic. Debate ensues about more supportive living situations for these youth, with most research supporting foster homes over orphanages. This article compares these two situations in the country of Malawi, considering how the two systems meet material needs, psychosocial needs, and those needs created by the constraints of the nonprofit environment in Malawi. Interviews were conducted with 50 orphans, nine orphanage and foster system administrators, five foster and group home caregivers, five health care workers, and five community members. All interviewees were asked questions about the children's routine, educational experience, residence characteristics, responsibilities, free time, health care, and future prospects. Administrators and parents were also queried about the management and organization of the programs, and health care workers were asked additional questions about the orphans’ health care and supplies for it. It was found that Malawian orphans placed in orphanages have an advantage over those placed in foster homes along the dimensions of lodging, health care, food quantity and variety, clothing, and school supplies. Additionally, children in orphanages have more autonomy, and have a broader concept of their future potential. Orphanage residents view their caregivers as compassionate and loving. Finally, it was found that orphanages are more efficient in providing care and at exchanging information with other organizations. They are also easier to replicate for use in other areas than are community‐based programs. The article concludes with a discussion of the policy implications of these findings and directions for future research.