59 research outputs found
Thermographic Investigation of Osseous Stress Pathology
The debilitating pathology of stress fracture accounts for 10% of all athletic injuries[2], with prevalence as high as 20% in modern military basic training cohorts [3]. Increasing concerns surrounding adverse effects of radiology [5],combined with the 12.5% contribution of diagnostic imaging to Australian Medicare benefits paid in 2009-10 [6], have prompted the search for alternative/adjunct electronic decision support systems[7]. Within conducive physioanatomic milieu, thermal infrared imaging (TIRI) may feasibly be used to remotely detect and topographically map diagnostically useful signs of suprathreshold thermodynamic pathophysiology. This paper details a three month clinical pilot study into TIRI-based detection of osseous stress pathology in the lower legs of Australian Army basic trainees. A dataset of over 500 TIRIâs was amassed. The apparent ânormalâ thermal profile of the anterior aspect of the asymptomatic lower leg is topographically defined and validated against current thermophysiological theory [8] via cadaveric dissection
Image Processing for Pathological Visualization in Multitemporal Convoluted TIRI
The convoluted nature of thermal infrared radiation and poor understanding of the physical mechanismsof human emittance, make objective image acquisition and processing protocols prerequisite for meaningful diagnostic specificity. A longitudinal dataset of clinical thermal infrared images was objectively processed to facilitate visualization of osseous stress pathology in the lower limbs.. This paper details processing of 500+ thermal infrared images acquired during a recent three month clinical study into osseous stress pathology in the lower limbs of Australian Army basic trainees. The use ofthermal chroma-keying in segmentation and multitemporal image calibration is demonstrated. The âOpenSURFâ implementation of the scale and rotation-invariant interest point detector and escriptor are shown to be performant in registration of multitemporal clinical thermal infrared image data. Thermal âsignsâ observed in longitudinal images appear to be revealing detectable changes in osseous stress pathophysiology
Evaluation of thermal pattern distributions in racehorse saddles using infrared thermography
The impact of a riderâs and saddleâs mass on saddle thermal pattern distribution was evalu ated using infrared thermography (IRT). Eighteen racehorses were ridden by four riders with
their own saddle. Images of the saddle panels were captured at each of six thermographic
examinations. On each image, six regions of interest (ROIs) were marked on the saddle
panels. The mean temperature for each ROI was extracted. To evaluate the influence of
load on saddle fit, 4 indicators were used: ÎTmax (difference between the mean temperature
of the warmest and coolest ROI); standard deviation of the mean temperature of the six
ROIs; right/left; bridging/rocking and front/back thermal pattern indicator. Incorrect saddle fit
was found in 25 measurements (23.1%) with ÎTmax greater than 2ËC. The relationships
between rider and saddle fit as well as saddle fit and horse were significant (p<0.001). An
average ÎTmax in rider A was significantly higher than in other riders (p<0.001). The right/left
thermal pattern differed significantly from the optimal value for riders A and B; while the
bridging/rocking thermal pattern differed significantly from this value for riders A, C and D
(p<0.05). Front saddle thermal pattern was most frequent for rider A (41.5%), whereas back
saddle thermal pattern was most frequent for rider C (85.7%). Measurement of the mean
temperature in 6 ROIs on saddle panels after training was helpful in assessing the influence
of rider and saddle mass on saddle fit. IRT offered a non-invasive, rapid and simple method
for assessing load on thermal pattern distribution in race saddles.info:eu-repo/semantics/publishedVersio
Towards application of thermal infrared imaging in medical diagnosis: protocols and investigations
This thesis âThermal Infrared Imaging: Advancement for Clinical Applicationsâ documents a series of clinical and laboratory investigations into: development and application of protocols for objective acquisition and processing of clinical TIRI image data, characterisation of human tissue emissivity within clinically-relevant regimes, and use of thermal infrared imaging to determine the depth of subcutaneous heat sources. This work was supported by the Australian Defence Science & Technology Organisation, Western Australian Department of Health, and Flir Systems
Correlating femoral shape with patellar kinematics in patients with patellofemoral pain
The etiology of patellofemoral pain is likely related to pathological femoral shape and soft-tissue restraints imbalance. These factors may result in various maltracking patterns in patients with patellofemoral pain. Thus, we hypothesized that femoral shape influences patellofemoral kinematics, but that this influence differs between kinematically unique subgroups of patients with patellofemoral pain. 3D MRIs of 30 knees with patellofemoral pain and maltracking (âmaltrackersâ) and 33 knees of asymptomatic subjects were evaluated, retrospectively. Dynamic MRI was acquired during a flexion-extension task. Maltrackers were divided into two subgroups (nonlateral and lateral maltrackers) based on previously defined kinematic criteria. Nine measures of femoral trochlear shape and two measures of patellar shape were quantified. These measures were correlated with patellofemoral kinematics. Differences were found in femoral shape between the maltracking and asymptomatic cohorts. Femoral shape parameters were associated with patellar kinematics in patients with patellofemoral pain and maltracking, but the correlations were unique across subgroups within this population. The ability to better categorize patients with patellofemoral pain will likely improve treatment by providing a more specific etiology of maltracking in individual patients. © 2010 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 28:865â872, 2010Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/75790/1/21101_ftp.pd
Global Perspective on Diabetic Foot Ulcerations
Over the last decade, it is becoming increasingly clear that diabetes mellitus is a global epidemic. The influence of diabetes is most readily apparent in its manifestation in foot complications across cultures and continents. In this unique collaboration of global specialists, we examine the explosion of foot disease in locations that must quickly grapple with both mobilizing medical expertise and shaping public policy to best prevent and treat these serious complications. In other areas of the world where diabetic foot complications have unfortunately been all too common, diagnostic testing and advanced treatments have been developed in response. The bulk of this book is devoted to examining the newest developments in basic and clinical research on the diabetic foot. It is hoped that as our understanding of the pathophysiologic process expands, the devastating impact of diabetic foot complications can be minimized on a global scale
Aerospace medicine and biology: A continuing bibliography with indexes, supplement 164
This bibliography lists 275 reports, articles, and other documents introduced into the NASA scientific and technical information system in January 1977
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