Cost effectiveness of magnetic resonance imaging in diagnosing Pseudomonas aeruginosa infection after puncture wound
University of California, San Diego Medical Center 92103, USA.The Journal of Foot and Ankle Surgery (Impact Factor: 0.85). 01/1997; 36(1):36-43. DOI: 10.1016/S1067-2516(97)80009-9
This study was performed to determine the cost effectiveness of radiologic imaging studies in diagnosing Pseudomonas aeruginosa infections after puncture wounds and the respective comparison of imaging and scintigraphy. Using retrospective medical record review, we studied 12 patients with culture-proven Pseudomonas infections of bone, cartilage or joint, or soft tissues. Attention was paid to radiographic presentation, scintigraphic studies, and magnetic resonance imaging results. All available imaging studies were reviewed. A survey of the costs of each imaging study was conducted. All patients underwent surgery. Three patients had magnetic resonance imaging studies that provided definitive diagnosis of osteomyelitis and precise localization of involved bones, soft tissue edema, and periosteal abscess. Eight patients had bone scans, one of which was consistent with cellulitis; seven, with osteomyelitis; and two with no abnormalities. All patients had radiographs of the involved foot. Case 4 had three series of radiographs. Nine of the twelve patients (75%) had normal findings on radiographs, with only soft tissue swelling or osteoporosis. Five patients had evidence of osteomyelitis. Magnetic resonance imaging is a cost-effective method in diagnosing Pseudomonas osteomyelitis. Early use of magnetic resonance imaging can provide definitive diagnosis and more precise anatomic localization necessary for surgical intervention.
Conference Paper: Statistical properties of high quality stereo signals in the time domain[Show abstract] [Hide abstract]
ABSTRACT: Bit-rate reduction algorithms are examined for compact disks, containing high-quality stereo signals sampled at 44.1 kHz and 16 bits/sample. Reducing the bit rate for the stereo signals requires knowledge of the statistics. Probability densities and joint probability densities provide parameters for individual samples. Short-time energies and correlation coefficients express similarities and linear relationships of blocks of samples. It is shown that by replacing the original signals in the left and the right channel by half of the sum and half of the difference, a small reduction of the amplitudes takes place. Linear relationships in the channels could not be found. The similarities of the short time energies together with the retaining of the energy after a transform indicate possible correlations in the frequency domainAcoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on; 06/1989
Conference Paper: Edge-preserving frequency selective filtersNonlinear Digital Signal Processing, 1993. IEEE Winter Workshop on; 02/1993
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ABSTRACT: Although the diagnosis of infection is only a small part of the orthopedist's job description, it is a important part. This article discusses the fundamentals of orthopedic infections and highlights the refinements on this topic from a radiologic perspective. In addition to reviewing the imaging appearance of musculoskeletal infections in bone and the surrounding soft tissues, we focus on the advantages and disadvantages of five imaging methods: radiography, sonography, CT, scintigraphy, and MR imaging. Finally, we review three specific situations that have garnered substantial attention in recent medical literature: chronic recurrent multifocal osteomyelitis, musculoskeletal infections in AIDS patients, and pedal infections in diabetic patients.Orthopedic Clinics of North America 02/1998; 29(1):41-66. DOI:10.1016/S0030-5898(05)70006-7 · 1.25 Impact Factor
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