Biomedical subjects

John F Turner

Publications and source records attributed to John F Turner.

2 recordsLinked to original sources

PubMed2004

Cosine histogram analysis for spectral image data classification.

Conventional multivariate strategies for making qualitative estimates of sample composition rely chiefly on identifying subtle differences in spectral shape. In some instances, such as in biological tissues, the spectra obtained from a single sample class may consist of many shapes. Likewise, two distinctly different sample classes, such as normal and abnormal tissue, may produce similar variations in spectral shape. In our work, we employ statistical analysis of the set of cosine correlation scores obtained from multispectral visible absorption images of stained cervical Papanicolaou samples. By analyzing the cosine correlation score frequency for spectra obtained from the cell nuclei, abnormal cells can be differentiated from the background of normal cells, which vary considerably in their optical properties and morphology. Our method, called cosine histogram analysis (CHA), returns the percent likelihood of abnormality for each pixel in the field of view and is presented here for the first time.

Female↗

PubMed2002

A brief history of illusion: Milner, Winnicott and Rycroft.

Illusion is a word that Raymond Williams might have included among his list of keywords of British culture, since it is a word that discloses 'both continuity and discontinuity, and also deep conflicts of value and belief' within its intellectual and political history (1983, p. 23). It is a banner under which the meaning of that culture has frequently been contested. The author indicates some of the more significant of these contests, with occasional glances at the wider European context and with special reference to the history of psychoanalysis, where the conflicts that characterise the larger history of the word have been interestingly re-enacted. In particular, the author explores its significance for the English psychoanalysts Marion Milner and Charles Rycroft and, more centrally, for Donald Winnicott, not least because in Winnicott's case it is a word that has been treated only peripherally in the two books that are organised around the study of his language, Alexander Newman's Non-Compliance in Winnicott's Words (1995) and Jan Abram's The Language of Winnicott (1996).

Female↗