Although virtual colon dissection may facilitate detection of colonic polyps in isolated cases, its detection rate is not superior to axial interpretation, which is mainly attributable to failed rendering of insufficiently distended colonic segments or regions with residual feces. Virtual colon dissection is also the more time-consuming of the two procedures. With further improvement of path-finding and image segmentation, however, virtual colon dissection has the potential to be a useful interpretation tool for CT colonography.
Purpose:To evaluate the diagnostic accuracy of in situ postmortem multislice computed tomography (MSCT) and magnetic resonance imaging (MRI) in the detection of primary traumatic extra-axial hemorrhage. Materials and Methods:Thirty forensic neurotrauma cases and 10 nontraumatic controls who underwent both in situ postmortem cranial MSCT and MR imaging before autopsy were retrospectively reviewed. Both imaging modalities were analyzed in view of their accuracy, sensitivity, and specificity concerning the detection of extra-axial hemorrhage. Statistical significance was calculated using the McNemar test. values for interobserver agreement were calculated for extra-axial hemorrhage types and to quantify the agreement between both modalities as well as MRI, CT, and forensics, respectively. Results:Analysis of the detection of hemorrhagic localizations showed an accuracy, sensitivity, and specificity of 89%, 82%, and 92% using CT, and 90%, 83%, and 94% using MRI, respectively. MRI was more sensitive than CT in the detection of subarachnoid hemorrhagic localizations (P ϭ 0.001), whereas no significant difference resulted from the detection of epidural and subdural hemorrhagic findings (P ϭ 0.248 and P ϭ 0.104, respectively). Interobserver agreement for all extra-axial hemorrhage types was substantial (CT ϭ 0.76; MRI ϭ 0.77). The agreement of both modalitites was almost perfect (readers 1 and 2 ϭ 0.88). Conclusion:CT and MRI are of comparable potential as forensic diagnostic tools for traumatic extra-axial hemorrhage. Not only of forensic, but also of clinical interest is the observation that most thin blood layers escape the radiological evaluation. TRAUMATIC BRAIN INJURY (TBI) is a major public health issue in the UnitedStates, with an estimated number of 1.4 million events each year, resulting in more than 50,000 deaths, over 80,000 patients with permanent disability, and, moreover, currently 5.3 million Americans requiring a long-term or lifelong need for help in performing activities of daily living (1,2). Studies have shown that TBI represents over 30% of all injuryrelated deaths (3) and generates an annual cost to society of $56.3 billion due to direct and indirect costs. The three main causes of TBI are falls (28%), trafficrelated accidents (20%), and assaults (11%), with motor vehicle incidents causing the largest number of TBIrelated deaths and hospitalizations, and falls causing most of the emergency department visits.In clinical medicine, neuroimaging techniques play an important role in the diagnostics of TBI (4). Considering that prompt and proper management of TBI-related hemorrhage significantly reduces mortality and morbidity along with hospital stay duration and healthcare costs, neuroimaging has become a 'sine qua non' application in major TBI cases (5). The easy accessibility, the manageable application, and the relatively low costs turned conventional computed tomography (CT) into the primary imaging modality during the first 48 hours after head trauma. The importance of magnetic resonance imaging...
To compare the clinical importance of extracolonic findings at intravenous (IV) contrast-enhanced CT colonography versus those at nonenhanced CT colonography. IV contrast medium-enhanced (n=72) and non-enhanced (n=30) multidetector CT colonography was performed in 102 symptomatic patients followed by conventional colonoscopy on the same day. The impact of extracolonic findings on further work up and treatment was assessed by a review of patient records. Extracolonic findings were divided into two groups: either leading to further work up respectively having an impact on therapy or not. A total of 303 extracolonic findings were detected. Of those, 71% (215/303) were found on IV contrastenhanced CT, and 29% (88/303) were found on non-enhanced CT colonography. The extracolonic findings in 25% (26/102) of all patients led to further work up or had an impact on therapy. Twenty-two of these patients underwent CT colonography with IV contrast enhancement, and four without. The percentage of extracolonic findings leading to further work up or having an impact on therapy was higher for IV contrast-enhanced (31%; 22/72) than for non-enhanced (13%; 4/30) CT scans (P=0.12). IV contrastenhanced CT colonography produced more extracolonic findings than non-enhanced CT colonography. A substantially greater proportion of findings on IV contrast-enhanced CT colonography led to further work up and treatment than did nonenhanced CT colonography.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.