Introduction: Advances in image quality from modern Dual Energy X-ray absorptiometry (DXA) scanne... more Introduction: Advances in image quality from modern Dual Energy X-ray absorptiometry (DXA) scanners now allow near radiograph-like quality images at a low radiation dose. This opens potential new applications for the use of DXA scanners to study other musculoskeletal conditions, such as osteoarthritis which is often investigated by visual assessment of radiographs. Together, osteoporosis and osteoarthritis are the two most common musculoskeletal conditions, both of which primarily affect older people. The aim of this study was to determine whether Kellgren-Lawrence grading of DXA images can be used to grade hip osteoarthritis as effectively as radiographs. Methodology: People who had attended for recent pelvic radiographs underwent DXA images of hips (50 hips from 25 people) using a GE Healthcare iDXA scanner. Three observers assigned Kellgren-Lawrence grades to each image and grading was repeated at least one week apart. Intraobserver and inter-observer reliability for radiograph a...
Congenital tufting enteropathy is a rare condition which presents in early infancy. It is a condi... more Congenital tufting enteropathy is a rare condition which presents in early infancy. It is a condition which should be suspected in infants who present with diarrhoea soon after birth. A rare association with arthritis has been observed with a handful of cases documented in the literature. Our case differs as the arthritis described is erosive in nature, a feature which is not present in other cases.
PURPOSE/AIM In coronary computer angiography, artifacts are a major cause affecting the proper in... more PURPOSE/AIM In coronary computer angiography, artifacts are a major cause affecting the proper interpretation of coronary artery stenosis, plaque, coronary stent and cardiac morphology assessment. This pictorial review identifies common artifacts, and discusses how to recognize, prevent and mitigate them. CONTENT ORGANIZATION • To recognize the impact of cardiac image artifacts on proper interpretation of coronary CTA, (ie. even on a 64 slice scanner, 11% of coronary segments are not evaluable) • Provide an overview of cardiac CT technique (i.e. retrospective gated helical acquisition and prospective axial gated acquisition) • Describe common artifacts such as: blur/star artifact, blooming, streaking, stair-step, beat-to-beat variability, poor signal to noise • Mitigation techniques: sharp algorithms, ECG edits SUMMARY Cardiac image artifiacts are a major cause of false positive and false negative assessments of coronary artery stenosis, particularly in the presence of coronary arte...
PURPOSE/AIM 1. Provide a pictorial review of salient features of complications of infectious rena... more PURPOSE/AIM 1. Provide a pictorial review of salient features of complications of infectious renal diseases including: emphysematous, xanthogranulomatous and chronic pyelonephritis, renal abscesses as well as hydronephrosis and pyonephrosis 2. Describe the role of MDCT in the management and diagnosis of complicated renal infections CONTENT ORGANIZATION This poster illustrates the pathologic features of the complications of renal infection, describes the role of diagnostic imaging, and correlates radiologic findings with the underlying disease process. A discussion of how the advent of MDCT allows for better assessment of the renal parenchyma and dynamic function of the kidney over conventional techniques. Finally, a review of MDCT scanning protocol in complicated renal infections will be described. SUMMARY MDCT plays a pivotal role in demonstrating the nature and extent of renal disease and has the potential to reveal complications such abscess or obstruction. Furthermore, MDCT prov...
Introduction: Advances in image quality from modern Dual Energy X-ray absorptiometry (DXA) scanne... more Introduction: Advances in image quality from modern Dual Energy X-ray absorptiometry (DXA) scanners now allow near radiograph-like quality images at a low radiation dose. This opens potential new applications for the use of DXA scanners to study other musculoskeletal conditions, such as osteoarthritis which is often investigated by visual assessment of radiographs. Together, osteoporosis and osteoarthritis are the two most common musculoskeletal conditions, both of which primarily affect older people. The aim of this study was to determine whether Kellgren-Lawrence grading of DXA images can be used to grade hip osteoarthritis as effectively as radiographs. Methodology: People who had attended for recent pelvic radiographs underwent DXA images of hips (50 hips from 25 people) using a GE Healthcare iDXA scanner. Three observers assigned Kellgren-Lawrence grades to each image and grading was repeated at least one week apart. Intraobserver and inter-observer reliability for radiograph a...
Congenital tufting enteropathy is a rare condition which presents in early infancy. It is a condi... more Congenital tufting enteropathy is a rare condition which presents in early infancy. It is a condition which should be suspected in infants who present with diarrhoea soon after birth. A rare association with arthritis has been observed with a handful of cases documented in the literature. Our case differs as the arthritis described is erosive in nature, a feature which is not present in other cases.
PURPOSE/AIM In coronary computer angiography, artifacts are a major cause affecting the proper in... more PURPOSE/AIM In coronary computer angiography, artifacts are a major cause affecting the proper interpretation of coronary artery stenosis, plaque, coronary stent and cardiac morphology assessment. This pictorial review identifies common artifacts, and discusses how to recognize, prevent and mitigate them. CONTENT ORGANIZATION • To recognize the impact of cardiac image artifacts on proper interpretation of coronary CTA, (ie. even on a 64 slice scanner, 11% of coronary segments are not evaluable) • Provide an overview of cardiac CT technique (i.e. retrospective gated helical acquisition and prospective axial gated acquisition) • Describe common artifacts such as: blur/star artifact, blooming, streaking, stair-step, beat-to-beat variability, poor signal to noise • Mitigation techniques: sharp algorithms, ECG edits SUMMARY Cardiac image artifiacts are a major cause of false positive and false negative assessments of coronary artery stenosis, particularly in the presence of coronary arte...
PURPOSE/AIM 1. Provide a pictorial review of salient features of complications of infectious rena... more PURPOSE/AIM 1. Provide a pictorial review of salient features of complications of infectious renal diseases including: emphysematous, xanthogranulomatous and chronic pyelonephritis, renal abscesses as well as hydronephrosis and pyonephrosis 2. Describe the role of MDCT in the management and diagnosis of complicated renal infections CONTENT ORGANIZATION This poster illustrates the pathologic features of the complications of renal infection, describes the role of diagnostic imaging, and correlates radiologic findings with the underlying disease process. A discussion of how the advent of MDCT allows for better assessment of the renal parenchyma and dynamic function of the kidney over conventional techniques. Finally, a review of MDCT scanning protocol in complicated renal infections will be described. SUMMARY MDCT plays a pivotal role in demonstrating the nature and extent of renal disease and has the potential to reveal complications such abscess or obstruction. Furthermore, MDCT prov...
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