Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Henry J. Llewellyn"'
Publikováno v:
European Journal of Radiology. 16:154-157
Image perception in chest radiography is thought to occur on two levels, (a) a fast global response based on learned templates (“gestalt”) and, (b) a slower systematic scan process. The relative importance of “gestalt” on the detection of nod
Autor:
K M Buckley, S Agatston, J R Rubens, Reginald Greene, Henry J. Llewellyn, H E Mrose, J Fay, C.M. Schaefer
Publikováno v:
American Journal of Roentgenology. 156:467-470
The detection of fine linear contours and altered aeration are requirements for the radiologic diagnosis of bullous lung disease and are severe measures of the spatial and contrast resolution of chest imaging systems. We compared plain film radiograp
Autor:
C M Schaefer, R C Lanza, Reginald Greene, J R Rubens, Oliver Lc, K A McCarthy, Deborah A. Hall, E Pile-Spellman, Henry J. Llewellyn, S R Lindemann
Publikováno v:
INVESTIGATIVE RADIOLOGY. 25:645-650
Digital storage phosphor radiography (SR) has a wide dynamic range and unique postprocessing capabilities that may improve the performance of screening studies for asbestos-related pleural disease compared with conventional film radiography (FR). In
Autor:
Richard Teplick, Carol A. Hulka, David J. Cullen, Henry J. Llewellyn, Gary J. Whitman, Hans S. JantsCh, Reginald Greene, Shane Thompson, Elizabeth M. Greene
Publikováno v:
AJR. American journal of roentgenology. 163(6)
Mechanical ventilation is thought to increase the risk of nosocomial pneumonia by permitting leakage of bacteria-laden gastro-oropharyngeal secretions into the upper airways. The goal of this study was (a) to validate radiographic signs of pooled sec
Autor:
Pierre Bourgouin, Henry J. Llewellyn, James T. Rhea, J R Rubens, Jörg W. Oestmann, Reginald Greene
Publikováno v:
INVESTIGATIVE RADIOLOGY. 24:467-470
The authors compared the impact of five postprocessing algorithms on diagnostic performance in the detection of simulated pulmonary nodules on storage phosphor-based digital chest radiographs. Tissue equivalent paraffin nodules (0.5-2.5 cm diameter)
Autor:
Jeffrey H. Newhouse, James T. Rhea, Majlc S. Potsaid, Isabel C. Yoder, Henry J. Llewellyn, Richard C. Pfister
Publikováno v:
Radiology. 127:583-588
Concepts necessary to an understanding of the basics of quality assurance audits are presented. Included are specific examples that bridged theory and practice by applying the protocol to a real-life diagnostic imaging situation. This method meets th
Autor:
J W Oestmann, Rubens, Reginald Greene, C. Robertson, Potsaid M, E Pile-Spellman, Henry J. Llewellyn, K A McCarthy, Deborah A. Hall, White G
Publikováno v:
Investigative Radiology. 24:643-646
Fine linear structures represent a severe test of the minimum spatial resolution that is needed for digital chest imaging. We studied the comparative observer performance of storage phosphor digital imaging (1760 X 2140 pixel matrix, 10 bits deep), a
Autor:
Karen P. Doppke, Leonard L. Gunderson, Anthony H. Russell, Henry J. Llewellyn, Joel E. Tepper
Publikováno v:
International journal of radiation oncology, biology, physics. 11(7)
For colorectal cancer, the adjuvant radiation dose levels required to achieve a high incidence of local control closely parallel the radiation tolerance of small bowel (4500-5000 rad), and for patients with partially resected or unresected disease, t
Publikováno v:
Radiology. 107(1)
The narrow lumbar spinal canal syndrome is characterized by (a) constriction of the interpediculate and anteroposterior diameters of the bony canal, (b) thickening and vertical orientation of the laminae as well as thickening of the facets and pedicl
Publikováno v:
International Journal of Radiation Oncology*Biology*Physics. 4:115-116