AJR. American journal of roentgenology
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AJR Am J Roentgenol · Nov 1995
Quantification of pneumothorax size on chest radiographs using interpleural distances: regression analysis based on volume measurements from helical CT.
The aim of this study was to define the relationship between interpleural distance measurements on an erect posteroanterior chest radiograph and pneumothorax size as measured by helical CT in a series of patients. ⋯ This study identified a formula for accurately calculating percentage pneumothorax size as determined by helical CT from an erect posteroanterior radiograph. Using this formula with the clinical status of the patient should more easily identify patients requiring active intervention.
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AJR Am J Roentgenol · Nov 1995
Traumatic anterior dislocation of the hip: spectrum of plain film and CT findings.
Traumatic anterior dislocation of the hip represents 11% of all hip dislocations and is classified into superior and inferior types [1]. Whereas inferior anterior hip dislocation is easily recognized on an anteroposterior radiograph of the pelvis, the radiographic appearance of superior anterior hip dislocation is less straightforward, often leading to an initial misdiagnosis of posterior hip dislocation. ⋯ In addition, recognition of associated impaction fractures is important, as patients with this finding have a greater tendency to develop traumatic arthritis [2, 3]. This pictorial essay, which is based on our experience with 20 cases of anterior hip dislocation, including five of the rare superior type, illustrates the spectrum of radiographic findings and distinguishing features associated with anterior hip dislocation.
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AJR Am J Roentgenol · Nov 1995
Fractures of the vertebrae with spinal cord injuries in patients with ankylosing spondylitis: imaging findings.
Ankylosing spondylitis is a systemic rheumatologic disorder of adults that results in disease-specific inflammation and eventual ossification at the site of ligamentous insertion into bone. The resulting spinal ankylosis causes biomechanical alterations that predispose the patient to serious spinal injury even in the presence of minor trauma. With the loss of spinal flexibility and increased bone fragility, there is a propensity for vertebral fracture, instability, and increased neurologic complications. Illustrative examples of the imaging modalities are presented, as they contribute to the detection of fractures and spinal cord injuries in patients with ankylosing spondylitis.
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AJR Am J Roentgenol · Nov 1995
Letter Case ReportsHilar pseudonodule due to varix of the inferior pulmonary vein.
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AJR Am J Roentgenol · Oct 1995
Chloral hydrate sedation of children undergoing CT and MR imaging: safety as judged by American Academy of Pediatrics guidelines.
The purpose of this prospective study was to determine the frequency of adverse events associated with supplemented and unsupplemented chloral hydrate sedation in a select group of children undergoing CT or MR imaging using the revised American Academy of Pediatrics (AAP) monitoring and management guidelines for pediatric sedation. The AAP guidelines do not recommend drug selection or dosages but define patient selection, discharge criteria, and monitoring standards for sedating children. ⋯ Use of supplemented and unsupplemented chloral hydrate sedation provides effective and safe sedation in children if the AAP guidelines for patient selection, monitoring, and management are followed. Careful medical screening and patient selection by knowledgeable medical personnel is important to exclude patients at high risk for life-threatening hypoxia. Monitoring with AAP guidelines is essential for prompt detection and management of life-threatening hypoxia.