摘要:

Congenital obstruction of the posterior urethra is a rare condition. Young, Frontz and Baldwin (1) in 1919 recorded twelve cases and collected twenty-four others from the literature: they described three types of the congenital valves of the posterior urethra which are the cause of this obstruction. Bugbee and Wollstein (2) have added eight cases in which the obstruction was due to hypertrophy of the verumontanum. These were all in young children; all those cases which have been recorded in adults appear to be of the valvular type.The result of this urethral obstruction is a dilatation of the whole urinary tract proximal to its site because of back pressure, with consequent impairment of renal function. Infection occurs sooner or later and death from uraemia is the eventual result.Few of these patients reach adult life, and in still fewer is the diagnosis made during life, hence the following case is of interest.

DOI:10.1259/0007-1285-1-12-485

出版商:The British Institute of Radiology    

年代:1928

数据来源: WILEY

摘要:

Miss T., age 33, was sent to be X rayed five months ago, on account of vague pelvic pain. She was a robust brunette, in service as a cook since 18 years of age, and stated that she had never had any previous illness. Menstruation had been regular since the age of 16, and there were no signs of past rickets or syphilis. The film of the pelvis (Fig. 1, Plate XLIII.) showed the following remarkable appearances:—Spots or patches of increased density of bone were scattered over the lower half of the pelvis and the upper part of both femora. These areas stood out in contrast with the rest of the bone, which had the normal appearance. In September, 1928, five months later, she came to be X rayed again at my request. She looked the picture of health and complained only of occasional pains in the legs after an extra hard day's work. The pelvis was again X rayed and showed again the same spotted appearance. Other parts were then plated. The head was normal, but the bones of both shoulder joints (Fig. 2, Plate XLIII.) and knees presented the same peculiar patches of increased density. As I have never seen a similar case and can find no published account of one, I am sending with these notes skiagrams of the pelvis and shoulder, in the hope that their reproduction may be of interest.

DOI:10.1259/0007-1285-1-12-486

出版商:The British Institute of Radiology    

年代:1928

数据来源: WILEY

摘要:

Ultra-violet rays were discovered as long ago as 1800, but it is only comparatively recently that people, other than scientists, have taken much interest in them. But to get back to the beginning of the subject one has to go back as far as 1666, when Isaac Newton made his famous experiment. He let a beam of sunlight pass through a glass prism and found that this beam was apparently split into a lot of different rays, which are now known as the spectral colours.Newton's experiment may be arranged so that the rays emerging from the prism fall on a white screen, and the band of different coloured lights, ranging from red at one end to violet at the other, can be carefully examined. Between the red and violet are the bands of orange, yellow, green, blue and indigo.There is no definite point where the violet light stops, as some people can see a little further than others in the region of light, but no one can see any colour beyond a certain limit, and this is where the ultra-violet rays begin.These rays are normally present in sunlight, but as they are invisible, Newton did not detect them. Although they cannot be seen, they have a profound effect on many things; photographic plates, for instance, are much more sensitive to ultra-violet rays than to ordinary light; in fact the discovery of ultra-violet rays was due to their chemical action.

DOI:10.1259/0007-1285-1-12-487

出版商:The British Institute of Radiology    

年代:1928

数据来源: WILEY

摘要:

This excellent little book is a welcome addition to the lists of specialist handbooks of medical radiology.

DOI:10.1259/0007-1285-1-12-490-a

出版商:The British Institute of Radiology    

年代:1928

数据来源: WILEY

摘要:

Unlike radiotherapy, which almost from its beginning has had a physical basis, radiography has remained very largely empirical. Dr. W. Bronkhurst, in a study of contrast and sharpness as present in the X-ray image, has therefore tried to establish an experimental basis for the different factors influencing the production of the skiagram, and to systematise them.The first part of the book deals with the influence on the contrast exercised by the intensity of radiation, by the quality of the rays, by the thickness of the absorbing and diffusing tissues, by intensifying screens and by the Potter-Bucky diaphragm.The second part is concerned with the factors which govern the sharpness of the X-ray image, such as the condition of the focus, the quality of the tube, the scattered radiation and the use of intensifying screens.

DOI:10.1259/0007-1285-1-12-491-b

出版商:The British Institute of Radiology    

年代:1928

数据来源: WILEY

摘要:

This is a useful work on the subject.

DOI:10.1259/0007-1285-1-12-492-d

出版商:The British Institute of Radiology    

年代:1928

数据来源: WILEY