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https://www.readbyqxmd.com/read/28917753/nuclear-forensics-investigation-of-morphological-signatures-in-the-thermal-decomposition-of-uranyl-peroxide
#1
Ian J Schwerdt, Adam Olsen, Robert Lusk, Sean Heffernan, Michael Klosterman, Bryce Collins, Sean Martinson, Trenton Kirkham, Luther W McDonald
The analytical techniques typically utilized in a nuclear forensic investigation often provide limited information regarding the process history and production conditions of interdicted nuclear material. In this study, scanning electron microscopy (SEM) analysis of the surface morphology of amorphous-UO3 samples calcined at 250, 300, 350, 400, and 450°C from uranyl peroxide was performed to determine if the morphology was indicative of the synthesis route and thermal history for the samples. Thermogravimetic analysis-mass spectrometry (TGA-MS) and differential scanning calorimetry (DSC) were used to correlate transitions in the calcined material to morphological transformations...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28915346/a-review-of-chemical-spot-tests-a-presumptive-illicit-drug-identification-technique
#2
REVIEW
Morgan Philp, Shanlin Fu
Chemical 'spot' tests are a presumptive illicit drug identification technique commonly used by law enforcement, border security personnel, and forensic laboratories. The simplicity, low cost and rapid results afforded by these tests make them particularly attractive for presumptive identification globally. In this paper, we review the development of these long-established methods and discuss color test recommendations and guidelines. A search of the scientific literature revealed the chemical reactions occurring in many color tests are either not actively investigated or reported as unknown...
September 15, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28905100/frequency-and-influencing-factors-of-cardiopulmonary-resuscitation-related-injuries-during-implementation-of-the-american-heart-association-2010-guidelines-a-retrospective-study-based-on-autopsy-and-postmortem-computed-tomography
#3
Rutsuko Yamaguchi, Yohsuke Makino, Fumiko Chiba, Suguru Torimitsu, Daisuke Yajima, Go Inokuchi, Ayumi Motomura, Mari Hashimoto, Yumi Hoshioka, Tomohiro Shinozaki, Hirotaro Iwase
AIM: To determine the frequency of cardiopulmonary resuscitation (CPR)-related injuries and factors involved in their occurrence, data based on forensic autopsy and postmortem computed tomography (PMCT) during implementation of the 2010 American Heart Association Guidelines for CPR were studied. METHODS: We retrospectively evaluated data on adult patients with non-traumatic deaths who had undergone manual CPR and autopsy from January 2012 to December 2014. CPR-related injuries were analyzed on autopsy records and PMCT images and compared with results of previous studies...
September 13, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28889864/the-transfer-of-diatoms-from-freshwater-to-footwear-materials-an-experimental-study-assessing-transfer-persistence-and-extraction-methods-for-forensic-reconstruction
#4
E A Levin, R M Morgan, K R Scott, V J Jones
In recent years there has been growing interest in environmental forms of trace evidence, and ecological trace evidence collected from footwear has proved valuable within casework. Simultaneously, there has been growing awareness of the need for empirical experimentation to underpin forensic inferences. Diatoms are unicellular algae, and each cell (or 'frustule') consists of two valves which are made of silica, a robust material that favours their preservation both in sediments and within forensic scenarios...
September 2017: Science & Justice: Journal of the Forensic Science Society
https://www.readbyqxmd.com/read/28889331/magnetic-resonance-imaging-based-evaluation-of-ossification-of-the-medial-clavicular-epiphysis-in-forensic-age-assessment
#5
S Schmidt, C Ottow, H Pfeiffer, W Heindel, V Vieth, A Schmeling, R Schulz
Evaluation of the degree of ossification of the medial clavicular epiphysis plays a crucial role in determining with an adequate degree of probability whether legally relevant age boundaries after the age of 17 have been crossed. In view of the need to avoid unnecessary radiation exposure, establishing non-X-ray methods for investigating the clavicle has long been a key objective in forensic age assessment research. Based on magnetic resonance imaging examinations in a large sample of healthy subjects, the current study for the first time presents statistical measures which allow inferences to be drawn for forensic age assessment in both sexes...
September 9, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28884851/-bottom-up-in-situ-proteomic-differentiation-of-human-and-non-human-haemoglobins-for-forensic-purposes-by-maldi-tof-ms-ms
#6
K P Kirkbride, S Kamanna, J Henry, N Voelcker, A Linacre
RATIONALE: The detection and identification of human blood on crime-related items are of particular relevance to many investigations because shed blood can provide evidence of violent contact between individuals. However, for any detection and identification technique, specificity is a critical performance characteristic to assess; that is, whether the technique has the capability to differentiate between human blood (which usually is of relevance to a criminal investigation) and non-human blood (which usually would not be associated with a crime but may be detected incidentally)...
September 8, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28869907/bone-comparison-identification-method-based-on-chest-computed-tomography-imaging
#7
Yusuke Matsunobu, Junji Morishita, Yosuke Usumoto, Miki Okumura, Noriaki Ikeda
The aim of this study is to examine the usefulness of bone structure extracted data from chest computed tomography (CT) images for personal identification. Eighteen autopsied cases (12 male and 6 female) that had ante- and post-mortem (AM and PM) CT images were used in this study. The two-dimensional (2D) and three-dimensional (3D) bone images were extracted from the chest CT images via thresholding technique. The similarity between two thoracic bone images (consisting of vertebrae, ribs, and sternum) acquired from AMCT and PMCT images was calculated in terms of the normalized cross-correlation value (NCCV) in both 2D and 3D matchings...
August 31, 2017: Legal Medicine
https://www.readbyqxmd.com/read/28865387/exploring-the-relationship-between-stride-stature-and-hand-size-for-forensic-assessment
#8
Richard Guest, Oscar Miguel-Hurtado, Sarah Stevenage, Sue Black
Forensic evidence often relies on a combination of accurately recorded measurements, estimated measurements from landmark data such as a subject's stature given a known measurement within an image, and inferred data. In this study a novel dataset is used to explore linkages between hand measurements, stature, leg length and stride. These three measurements replicate the type of evidence found in surveillance videos with stride being extracted from an automated gait analysis system. Through correlations and regression modelling, it is possible to generate accurate predictions of stature from hand size, leg length and stride length (and vice versa), and to predict leg and stride length from hand size with, or without, stature as an intermediary variable...
August 26, 2017: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/28841507/copy-move-forgery-detection-through-stationary-wavelets-and-local-binary-pattern-variance-for-forensic-analysis-in-digital-images
#9
Toqeer Mahmood, Aun Irtaza, Zahid Mehmood, Muhammad Tariq Mahmood
The most common image tampering often for malicious purposes is to copy a region of the same image and paste to hide some other region. As both regions usually have same texture properties, therefore, this artifact is invisible for the viewers, and credibility of the image becomes questionable in proof centered applications. Hence, means are required to validate the integrity of the image and identify the tampered regions. Therefore, this study presents an efficient way of copy-move forgery detection (CMFD) through local binary pattern variance (LBPV) over the low approximation components of the stationary wavelets...
August 4, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28836139/post-mortem-ct-imaging-of-the-lungs-pathological-versus-non-pathological-findings
#10
REVIEW
Laura Filograna, Michael J Thali
Nowadays, the modern computed tomography techniques are more and more applied in forensic investigations. The detection of abnormalities in post-mortem computed tomography (PMCT) imaging of the lungs is very common. As in clinical imaging, also in post-mortem imaging the right interpretation of alterations has an extreme importance for the assessment of correct conclusions. This is even crucial when the radiologist who approaches the PMCT images is not routinely involved in forensic cases. The aim of this article is to provide radiologists who approach PMCT imaging cases with some indications for a proper and correct interpretation of pulmonary findings, to avoid misleading forensic conclusions...
August 23, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28834569/adverse-childhood-experiences-and-criminal-extremity-new-evidence-for-sexual-homicide
#11
Matt DeLisi, Eric Beauregard
Adverse childhood experiences are associated with a wide range of behavioral, health, and psychiatric deficits and have recently been used to study the development of serious offending careers. Unfortunately, this research paradigm has largely ignored forensic populations. This study utilized the adverse childhood experiences framework to examine the associations between exposure to violence, victimization, and total adverse childhood experiences on sexual homicide using a sample of 616 incarcerated adult male sexual offenders from Canada 85 of whom committed sexual homicide...
August 23, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28832945/occurrence-of-osteon-banding-in-adult-human-cortical-bone
#12
Janna M Andronowski, Isaac V Pratt, David M L Cooper
OBJECTIVES: Differentiating human from nonhuman fragmented bone is often accomplished using histological methods if the observation of gross morphology proves insufficient. Linearly oriented primary and/or secondary osteonal systems, commonly referred to as osteon bands, are described as a strong indicator of nonhuman bone, particularly the occurrence of multiple bands. This phenomenon has been conventionally documented using two-dimensional (2D) histology, but such analyses are destructive and typically limited to a single cross-section...
August 19, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28828524/differentiating-human-versus-non-human-bone-by-exploring-the-nutrient-foramen-implications-for-forensic-anthropology
#13
Vail Johnson, Sophie Beckett, Nicholas Márquez-Grant
One of the roles of a forensic anthropologist is to assist medico-legal investigations in the identification of human skeletal remains. In some instances, only small fragments of bone may be present. In this study, a non-destructive novel technique is presented to distinguish between human and non-human long bones. This technique is based on the macroscopic and computed tomography (CT) analysis of nutrient foramina. The nutrient foramen of long bone diaphyses transmits the nutrient artery which provides much of the oxygen and nutrients to the bone...
August 21, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28828513/-postmortem-imaging-procedures-experiences-and-perspectives
#14
REVIEW
S von Stillfried, P Isfort, R Knüchel-Clarke
Autopsies are of key importance for the understanding of the anatomy, pathophysiology and pathomorphology. In forensic medicine, the virtual autopsy is a standard instrument in autopsy practice. The advantage of postmortem imaging is the generation of a three-dimensional pre-autopsy snapshot of the body from head to toe with excellent visualization of skeletal pathologies and air inclusions. When angiography is performed, pathologies of the cardiovascular system can additionally be evaluated. The shortcomings of postmortem imaging are the low soft tissue contrast with CT imaging, the lack of haptic, olfactory and color impressions...
August 21, 2017: Der Pathologe
https://www.readbyqxmd.com/read/28827844/post-mortem-computed-tomography-angiography-using-left-ventricle-cardiac-puncture-a-whole-body-angiographic-approach
#15
Yu Shao, Lei Wan, Jianhua Zhang, Zhengdong Li, Ningguo Liu, Ping Huang, Donghua Zou, Yijiu Chen
Post-mortem computed tomography (PMCT) and PMCT angiography (PMCTA) are rapidly becoming effective and practical methods in forensic medicine. In this article, the authors introduce a whole-body PMCTA approach involving left ventricle cardiac puncture. This procedure was performed in 9 males and 3 females. PMCT was performed first. Then a biopsy core needle was used for a percutaneous puncture into the left ventricle through the intercostal area under CT guidance. 1000 mL of contrast media (diatrizoate meglumine and normal saline [0...
2017: PloS One
https://www.readbyqxmd.com/read/28819715/automatic-detection-of-hemorrhagic-pericardial-effusion-on-pmct-using-deep-learning-a-feasibility-study
#16
Lars C Ebert, Jakob Heimer, Wolf Schweitzer, Till Sieberth, Anja Leipner, Michael Thali, Garyfalia Ampanozi
Post mortem computed tomography (PMCT) can be used as a triage tool to better identify cases with a possibly non-natural cause of death, especially when high caseloads make it impossible to perform autopsies on all cases. Substantial data can be generated by modern medical scanners, especially in a forensic setting where the entire body is documented at high resolution. A solution for the resulting issues could be the use of deep learning techniques for automatic analysis of radiological images. In this article, we wanted to test the feasibility of such methods for forensic imaging by hypothesizing that deep learning methods can detect and segment a hemopericardium in PMCT...
August 18, 2017: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/28756305/age-assessment-in-canine-and-premolar-by-cervical-axial-sections-of-cone-beam-computed-tomography
#17
Hichem Nemsi, Nidhal Haj Salem, Ines Bouanene, Sami Ben Jomaa, Meriem Belhadj, Mohamed Amin Mosrati, Abir Aissaoui, Faten Ben Amor, Ali Chadly
Age estimation in adults is a challenge in both anthropological and forensic situations compared to sub-adults age estimation. The present study explored, for the first time, the cervical zone of single rooted teeth. The deposition of secondary dentin is responsible for a decrease in the volume of the dental pulp cavity with aging, and therefore is often used as an age indicator. The current study aimed at estimating the chronological age among adults by measuring the pulp/dentin area ratio (physiological ratio) by axial sections at cervical region of maxillary canine and mandibular second premolar...
September 2017: Legal Medicine
https://www.readbyqxmd.com/read/28746793/easi-ims-an-expedite-and-secure-technique-to-screen-for-25i-nboh-in-blotter-papers
#18
Damila Rodrigues de Morais, Ingrid Lopes Barbosa, Kelly Francisco Cunha, Guilherme Lucas Tripodi, Célio Fernando Figueiredo Angolini, Marcos Fernando Franco, Elvis Medeiros de Aquino, Marcos Nogueira Eberlin, Jose Luiz Costa
The increasing number of new psychoactive substances (NPS) and their quick worldwide spreading, often only slightly modified in the form of new derivatives and analogues, have brought the need for fast, wide-ranging and unequivocal identification methods in clinical and forensic investigations. Since it usually provides secure results, gas chromatography coupled to mass spectrometry (GC-MS) has been routinely employed as the standard technique for the detection of NPS in blotter papers. For 25I-NBOH (N-(2-hydroxybenzyl)-2-(4-iodo-2,5-dimethoxyphenyl)ethan-1-aminium), however, GC-MS analysis of an blotter paper extract leads to incorrect results...
July 26, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28742485/a-new-morphological-trait-in-forensic-identification-middle-phalangeal-hair-mph
#19
Kewal Krishan, Tanuj Kanchan
Middle phalangeal hairs (MPH) are present on the dorsal aspect of the middle phalange of the fingers except for the thumb. The MPH have been of interest to anthropologists, human biologists, clinicians, geneticists and anatomists in the past as a morphological trait of the human body. The anthropological value of MPH is well established in studying population variations, with implications for age, ancestry and sex differences. We are of the opinion that MPH may be used significantly for forensic identification purposes along with other morphological characteristics of the human body...
December 1, 2016: Science Progress
https://www.readbyqxmd.com/read/28738632/raman-hyperspectral-imaging-in-conjunction-with-independent-component-analysis-as-a-forensic-tool-for-explosive-analysis-the-case-of-an-atm-explosion
#20
Mariana Ramos Almeida, Lucio Paulo Lima Logrado, Jorge Jardim Zacca, Deleon Nascimento Correa, Ronei Jesus Poppi
In this work, Raman hyperspectral imaging, in conjunction with independent component analysis, was employed as an analytical methodology to detect an ammonium nitrate fuel oil (ANFO) explosive in banknotes after an ATM explosion experiment. The proposed methodology allows for the identification of the ANFO explosive without sample preparation or destroying the sample, at quantities as small as 70μgcm(-2). The explosive was identified following ICA data decomposition by the characteristic nitrate band at 1044cm(-1)...
November 1, 2017: Talanta
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