The other way of doing it is collimating accurately to the size of the cassette and use the illuminated field as your positioning guide. No centring points at all. Just ensure the crests are on the top of the radiograph. It is disgraceful practice to encourage radiography students to 'open the collimation all the way'. So a properly trained radiographer will ensure proper collimation, which means no primary beam misses the cassette. Accurate collimation also means male gonads can be accurately shielded. Using collimation as your positioning guide will close a feedback in your learning. Trying to remember centring points is useless except for passing stupid examinations. A big error in radiography is not understanding the geometry of a projection. 75% of qualified radiographers misunderstand this primary essential principle. Look at this video, The xray grid and geometry. kzitem.info/news/bejne/zpCGqpOdhaVmd6w to ensure you know how to do your job properly
Пікірлер: 4