Biomedical subjects
Publications and source records attributed to C Hood.
It is important to ensure that the position of the camera and the light source does not produce uneven illumination. Hot spots are caused by the light source being much closer to certain areas of the subject than others.
Standardisation is vital if the clinical images are to be used for monitoring any changes in the patient's condition. The two images can be cut and mounted in one 35 mm mount for comparison.
Always ensure that patient consent is obtained before any type of photography is undertaken, as the patient has the right to decide what is to happen to the images.
Reflectors can be made easily and used to illuminate areas of the photograph that are in shadow, so giving the equivalent of an extra light source. Choosing the correct background guards against colour cast and distracting shadow.
Remember to be aware of illumination and how the flash reflex may affect the final photograph.
In clinical photography, two views are often better than one to maximise the amount of information available to the viewer. Photographers should not endeavour to record everything in one shot.
The benefits of a ring flash in photographing an orifice can be seen in this interesting case where the main subject area is clearly visible. When photographing minors, the legal implications of the subject material needs to be considered to avoid contravening the Protection of Children Act.
Photographing small lesions at high magnification can make it difficult for the reader to orientate to the exact location. This issue's photograph shows all the clinical aspects of a cystic swelling on the patient's digit.
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Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Cats inoculated with live feline lymphoblastoid cells of the FL74 line developed high titres of antibody to feline oncornavirus-associated cell membrane antigen (FOCMA). Eight cats were subsequently challenged with a large dose of feline leukaemia virus (FeLV) of a highly pathogenic strain. All resisted infection while 10 cats given the challenge virus alone became infected. The FeLV produced by FL74 cells was shown to be of extremely low infectivity in cats and in cultured feline cells. Cats inoculated with either FL74 cells or virus purified from them did not become infected. The purified virus did not induce FOCMA antibody in cats not previously exposed to FeLV. The fact that FL74 cells are highly immunogenic, but produce virus of low infectivity, is of value in devising vaccines against FeLV. Cats were also inoculated with FL74 cells which had been inactivated with paraformaldehyde. They developed FOCMA antibody, reaching a peak titre of 256, and no virus could be cultured either from the vaccine preparations or from the tissues of the cats.
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Explore the source record for details and available documents.