"The information provided by MDCT has the potential to improve patient care and aid in both military and civilian forensic investigations," said the study's lead author, Les R. Folio, D.O., M.P.H., from the Uniformed Services University in Bethesda, Md.
U.S. troops stationed in Iraq and Afghanistan face threats from increased sniper activity and the use of improvised explosive devices. Current clinical reports of wounds from bullets and bomb fragments do not include the progression of the trajectory or the direction of the wound path, despite the fact that ballistic injuries are not necessarily confined to a single anatomic structure.
While research has shown the value of CT in the analysis of ballistic wound paths, there is no widely accepted method for consistently and accurately pinpointing wound paths and determining the trajectory angles.
For the study, researchers evaluated the accuracy of MDCT-based ballistic wound path identification. They had a marksman shoot six shots from a rifle into two simulated legs made from various synthetic materials to optimally represent real tissue. The legs were tilted at six different angles based on common sniper heights and distances.
After the leg phantoms were scanned with 64-channel MDCT, several radiologists independently reviewed the CT images and recorded entrance and exit sites for the bullet trajectories. The angles measured on MDCT corresponded closely with those calculated from coordinates with actual shooting angles. Dr. Folio and his team concluded that radiologists could estimate the location of a sniper or an explosive device by extrapolating trajectories identified on MDCT when other factors, such as sniper distance and the victim's position, are known.
"Investigators want to know where the sniper was and where the bomb blast originated," Dr. Folio said. "MDCT allows us to see the path and help determine these answers."
MDCT-based calculations of wound paths and angles of trajectory have other potential benefits, according to Dr. Folio, including assistance in crime scene analysis and the triage and treatment of patients. The work can also be applied to records from the Joint Theater Trauma Registry, a U.S. Department of Defense database of penetrating injuries in fatally and catastrophically wounded soldiers.
"This technology allows us to analyze thousands of penetrating injuries, correlate them with external ballistics and use that data to help develop protective gear and prevent future injuries," Dr. Folio said.
Additional research into MDCT's potential to analyze trajectories and wound paths in other areas of the body, including the head, chest and abdomen, is ongoing. Dr. Folio is currently leading a study on automated trajectory analysis in Vietnam veterans with traumatic brain injuries.
"CT-based Ballistic Wound Path Identification and Trajectory Analysis in Anatomic Ballistic Phantoms." Collaborating with Dr. Folio was Tatjana V. Fischer, Paul J. Shogan, D.O., Michael I. Frew, M.D., Pil S. Kang, M.D., Rolf Bunger, M.D., Ph.D., and James M. Provenzale, M.D.
Radiology is edited by Herbert Y. Kressel, M.D., Harvard Medical School, Boston, Mass., and owned and published by the Radiological Society of North America, Inc. (http://radiology.rsna.org/)
RSNA is an association of more than 46,000 radiologists, radiation oncologists, medical physicists and related scientists committed to excellence in patient care through education and research. The Society is based in Oak Brook, Ill. (RSNA.org)
For patient-friendly information on CT, visit RadiologyInfo.org.
Linda Brooks | EurekAlert!
The importance of biodiversity in forests could increase due to climate change
17.11.2017 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig
Win-win strategies for climate and food security
02.10.2017 | International Institute for Applied Systems Analysis (IIASA)
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
17.11.2017 | Physics and Astronomy
17.11.2017 | Health and Medicine
17.11.2017 | Studies and Analyses