Now showing items 21-30 of 32
Computerized classification of malignant and benign microcalcifications on mammograms: texture analysis using an artificial neural network
(IOP Publishing Ltd, 1997-03-01)
We investigated the feasibility of using texture features extracted from mammograms to predict whether the presence of microcalcifications is associated with malignant or benign pathology. Eighty-six mammograms from 54 ...
Insertional mutation of the hairless locus on mouse Chromosome 14
(Springer-Verlag, 1993-11)
Crosses between heterozygous transgenic mice from line 5053 produced offspring with progressive irreversible hair loss beginning at day 10. With increasing age, the skin of these animals became thicker and plicated in ...
Radiation damage studies of amorphous-silicon photodiode sensors for applications in radiotherapy X-ray imaging
(Elsevier, 1990-12-20)
The high radiation tolerance of hydrogenated amorphous silicon (a-Si:H) is one reason it has become a candidate for high-energy physics applications and for radiotherapy and diagnostic imaging. The performance of 1 [mu]m ...
Current‐noise‐power spectra of amorphous silicon thin‐film transistors
(The American Institute of Physics, 1994-08-15)
Current‐noise‐power spectra of thin‐film transistors (TFTs) fabricated from hydrogenated amorphous silicon were measured. TFTs with aspect ratios ranging from 1:1 to 16:1 were examined in both the conducting and nonconducting ...
Large area amorphous silicon photodiode arrays for radiotherapy and diagnostic imaging
(Elsevier, 1991-12-01)
Amorphous silicon imaging devices consisting of two-dimensional pixel arrays of photodiodes and field effect transistors can now be fabricated over areas as large as 30 cm by 30 cm. Such imagers can offer considerable ...
Radiation damage and electron lifetime measurements for liquid ionization chambers
(Elsevier, 1990-12-20)
Ionization chambers filled with liquids at room temperature have begun to be implemented in high-energy physics for total-ionization calorimeters and offer potential applications in medical physics for dosimetry and imaging ...
Direct Evidence for Homologous Sequences on the Paracentric Regions of Human Chromosome 1
(Elsevier, 1994-05-15)
Calcyclin is a member of the S100 family of proteins, many of which are encoded by genes that have been localized to the proximal long arm of human chromosome 1 (bands q21-q22). A 450-kb yeast artificial chromosome clone ...
T cell receptor [beta]-chain gene rearrangement without [gamma]-chain gene rearrangement in cutaneous T cell lymphoma: An unusual finding
(Elsevier, 1990-03)
T cells from the blood and skin of a patient with cutaneous T cell lymphoma demonstrated rearrangement of the T cell receptor [beta]-chain gene in the absence of rearrangement of the [gamma]-chain gene. To our knowledge, ...
Inhibition of Tumor Necrosis Factor Production by Lymphocytes from Anti-TNF Antibody-Treated, Cardiac-Allografted Rats
(Elsevier, 1994-06)
Tumor necrosis factor-[alpha] (TNF) is a multifunctional cytokine involved in the immunopathologic consequences of allograft rejection. We have previously demonstrated that anti-TNF antibody treatment prolongs cardiac ...