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George Simon, one of England's outstanding radiologists, has extensively rewritten and updated his admirable text, Principles of Chest X-Ray Diagnosis. He has added 114 new illustrations and 24 charts and diagrams to the third edition—the first appeared in 1956. The revision continues the pattern of didactic clarity that characterized Simon's other contributions to radiology: lucid style, excellent illustrations, and sensible arrangement of material under headings descriptive of the x-ray shadow. The appendix, "Some Hints on X-Ray Techniques," can be read profitably as we move—or are pushed—into a world of complicated and expensive equipment. Simon compares chest x-ray films made with the new high- and the old low-kilovoltage techniques. Although a matter of individual preference, he says that the new gives us sharper cardiac borders, that the appearance of vascular shadows is the same in both, but that the "general greyness of the radiographs taken with the high kvp made
Smith MJ. Principles Of Chest X-Ray Diagnosis, ed 3. Arch Intern Med. 1973;132(5):778. doi:10.1001/archinte.1973.03650110110038
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