{"id":50531,"date":"2021-06-25T16:00:19","date_gmt":"2021-06-25T15:00:19","guid":{"rendered":"https:\/\/blogs.bmj.com\/bmj\/?p=50531"},"modified":"2021-07-02T17:07:53","modified_gmt":"2021-07-02T16:07:53","slug":"jeffrey-aronson-when-i-use-a-word-the-cat-thats-a-black-swan","status":"publish","type":"post","link":"https:\/\/blogs.bmj.com\/bmj\/2021\/06\/25\/jeffrey-aronson-when-i-use-a-word-the-cat-thats-a-black-swan\/","title":{"rendered":"Jeffrey Aronson: When I Use a Word . . . The CAT that\u2019s a black swan"},"content":{"rendered":"

I have been looking for biomedical black swans, unexpected findings discovered by acute observation, among discoveries marked by the inclusion of relevant terms noted in the <\/span>Oxford English Dictionary<\/span><\/i> (OED). In the last few weeks I have briefly covered terms in <\/span>pharmacology<\/span><\/a>, <\/span>genetics<\/span><\/a>, <\/span>microbiology<\/span><\/a>, and <\/span>biochemistry<\/span><\/a>. But there is a large group of terms that I have previously simply labelled \u201cothers\u201d, 187 of them in all. I have now classified them roughly under 37 different headings. The top ranking categories are shown in Table 1.<\/span><\/p>\n

Table 1.<\/b> The main topics into which 143 out of 273 new biomedical words first cited in the <\/span>Oxford English Dictionary<\/span><\/i> between 1970 and 2020 can be classified<\/span><\/p>\n

\"\"<\/p>\n

Among the items that I have included in the category of devices is the CT scanner, which I might equally have included in the category of radiology.<\/span><\/p>\n

The IndoEuropean root SKAND meant to jump or climb. It gave the Latin word scandere to climb or to scan verse, climbing over its syllables one by one, and the Greek word <\/span>\u03c3\u03ba\u03ac\u03bd\u03b4\u03b1\u03bb\u03bf\u03bd, <\/span>a trap or stumbling block, something over which you need to climb. English words that are derived from these include ascend, descend, and transcend, scan, scanner, and scansion, scandal and slander, and, via a Latin variant, scalare, scale, escalade, and echelon.<\/span><\/p>\n

What was initially called computerized transverse axial tomography was first <\/span>announced<\/span><\/a> in an anonymous article in <\/span>Radiology<\/span><\/i> in January 1973, antedating by one month the earliest citation in <\/span>OED<\/span><\/i>, a <\/span>paper<\/span><\/a> by James Ambrose and Godfrey Hounsfield (Figure 1) in the <\/span>British Journal of Radiology<\/span><\/i> in February 1973. As Hounsfield described it later that year, <\/span>also<\/span><\/a> in the <\/span>British Journal of Radiology<\/span><\/i>, X-ray readings are taken at a multitude of angles, and tissue absorption data are calculated on a computer and presented as a series of pictures of tissue slices. The system that he described, applicable at that time only to the cranium, was about 100 times more sensitive than conventional X-radiology, so that variations in soft tissues of nearly similar density could be displayed. Those variations in density were originally transformed into numbers that could be printed out, later called Hounsfield numbers.<\/span><\/p>\n

Figure 1.<\/b> Godfrey Hounsfield (left) and James Ambrose (from The <\/em><\/span>BMJ<\/span><\/a><\/em> 2006; 332: 977)<\/span><\/p>\n

\"\"<\/p>\n

In his 1979 Nobel prize <\/span>biography<\/span><\/a>, Hounsfield described how the invention came about. Having served in the RAF he obtained a grant to study at Faraday House Electrical Engineering College in London. Then in 1951 he joined the company called Electrical and Musical Industries, better known as EMI, and worked on radar and guided weapons and later ran a small design laboratory. He became interested in computers, primitive at the time, and built the first British all-transistor computer, EMIDEC 1100.<\/span><\/p>\n

Hounsfield then moved to EMI\u2019s Central Research Laboratories, and began to design a one-million word computer store. However, his project lacked commercial viability and he was allowed to choose another project instead\u2014exploring computerized pattern recognition, which led to the development of the EMI-scanner, as he referred to it. I first came across the term in The BMJ<\/em> in August 1973, but in the form \u201cE.M.I. scanner\u201d in a <\/span>review<\/span><\/a>, by an Oxford colleague, the neurosurgeon Chris Adams, of a book called <\/span>Pituitary Tumours<\/span><\/i> by John S Jenkins. The hyphenated form, EMI-scanner, also first appeared in <\/span>1973<\/span><\/a>.<\/span><\/p>\n

It wasn\u2019t long before abbreviated forms started to be used. And although the original name for the technique, computerized transverse axial tomography (CTAT), was soon shortened to <\/span>computerized axial tomography<\/span><\/a> or <\/span>computer-assisted tomography<\/span><\/a>, the abbreviation CAT appeared only in 1975, in the <\/span>Wall Street Journal<\/span><\/i>, a year after the form that is now more commonly used, <\/span>CT<\/span><\/a>, standing for <\/span>computerized tomography<\/span><\/a> or <\/span>computed tomography<\/span><\/a>.\u00a0<\/span><\/p>\n

Profits earned from the Beatles <\/span>enabled<\/span><\/a> EMI to fund scientific research, and although they did not fund Hounsfield\u2019s work completely they did give him the freedom to choose his topic. It has been <\/span>pointed out<\/span><\/a> that an American neurologist, William Oldendorf, had invented a <\/span>similar system<\/span><\/a> in 1960. However, the response from a manufacturer of x-ray equipment was disappointing: \u201cEven if it could be made to work as you suggest, we cannot imagine a significant market for such an expensive apparatus which would do nothing but make a radiographic cross-section of a head.\u201d It took Hounsfield and Ambrose to spot the black swan.<\/span><\/p>\n

Jeffrey Aronson<\/strong>\u00a0is a clinical pharmacologist, working in the Centre for Evidence Based Medicine in Oxford’s Nuffield Department of Primary Care Health Sciences. He is also president emeritus of the British Pharmacological Society.<\/em><\/span><\/p>\n

Competing interests:<\/strong> none declared.<\/p>\n

\"\"<\/p>\n

1) https:\/\/blogs.bmj.com\/bmj\/2021\/04\/16\/jeffrey-aronson-when-i-use-a-word-new-and-not-so-new-medical-words<\/a>
\n2) https:\/\/blogs.bmj.com\/bmj\/2021\/06\/11\/jeffrey-aronson-when-i-use-a-word-black-swans-in-microbiology<\/a>
\n3) https:\/\/blogs.bmj.com\/bmj\/2021\/04\/26\/jeffrey-aronson-when-i-use-a-word-a-difficult-infection<\/a>
\n4) https:\/\/blogs.bmj.com\/bmj\/2021\/05\/14\/jeffrey-aronson-when-i-use-a-word-omics<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

I have been looking for biomedical black swans, unexpected findings discovered by acute observation, among discoveries marked by the inclusion of relevant terms noted in the Oxford English Dictionary (OED). […]<\/p>\n

More…<\/a><\/p>\n","protected":false},"author":419,"featured_media":38359,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5762],"tags":[],"class_list":["post-50531","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-jeff-aronsons-words"],"yoast_head":"\nJeffrey Aronson: When I Use a Word . . . The CAT that\u2019s a black swan - The BMJ<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.bmj.com\/bmj\/2021\/06\/25\/jeffrey-aronson-when-i-use-a-word-the-cat-thats-a-black-swan\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jeffrey Aronson: When I Use a Word . . . 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