Lloyd J Ridley

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PURPOSE To investigate prospectively the relative accuracy of computed tomographic (CT) angiography, calcium scoring (CS), and both methods combined in demonstrating coronary artery stenoses by using conventional angiography as the reference standard. MATERIALS AND METHODS The study was approved by the institutional review board Human Research Ethics(More)
OBJECTIVES The purpose of this study was to define magnetic resonance imaging (MRI) correlates of normal brain ageing, with the specific objective of investigating whether the size of the hippocampus is selectively correlated with age related memory performance in non-demented individuals in their ninth and tenth decades of life. METHODS Hippocampal size(More)
OBJECTIVES The purpose of this study was to determine the association between cardiac compression and exercise impairment in patients with a large hiatal hernia (HH). BACKGROUND Dyspnea and exercise impairment are common symptoms of a large HH with unknown pathophysiology. Studies evaluating the contribution of cardiac compression to the pathogenesis of(More)
A number of different methods have been employed to correct hippocampal volumes for individual variation in head size. Researchers have previously used qualitative visual inspection to gauge hippocampal atrophy. The purpose of this study was to determine the best measure(s) of hippocampal size for predicting memory functioning in 102 community-dwelling(More)
BACKGROUND To examine the changes in indications, patient characteristics, safety and outcomes in consecutive patients undergoing percutaneous core liver biopsies in a major Australian teaching hospital over a period of two decades. METHODS A retrospective audit was carried out on all percutaneous core liver biopsies from a single institution between 1996(More)
BACKGROUND The use of saphenous vein grafts (SVG) in coronary artery bypass surgery is established but little is known of SVG remodeling during the first year in vivo. METHODS AND RESULTS The feasibility of measuring total vessel diameter (lumen plus wall), lumen diameter, and wall thickness by a novel computed tomography (CT) method was established in(More)
BACKGROUND AND OBJECTIVE Glossopharyngeal insufflation (GI) is a technique practised by competitive breath-hold divers to enhance their performance. Using the oropharyngeal musculature, air is pumped into the lungs to increase the lung volume above physiological TLC. Experienced breath-hold divers can increase their lung volumes by up to 3 L. Although the(More)
BACKGROUND The number of individuals aged over 80 years is the fastest increasing group in developed countries. White matter lesions (WML) observed on magnetic resonance imaging (MRI) have uncertain clinical significance, particularly in the old. OBJECTIVES To determine the prevalence of periventricular and deep WML in survivors of an original cohort of(More)
The radiology report is an important, but often neglected, aspect of radiology. Suggestions on style and content are discussed. These include: (i) concise reporting; (ii) correct English; (iii) present tense for current reporting; (iv) reading the request with care; (v) recognizing the recipients; (vi) being aware of unintended readers; (vii) stating the(More)
BACKGROUND Studies on normal aging and cognitive functioning commonly describe early and more pronounced age-related changes in executive functions (EFs) compared to other cognitive abilities. Two of the three most common neurodegenerative disorders associated with aging (vascular dementia [VaD] and extrapyramidal [EP]-related dementia) show executive(More)