Question 2607
{"accessible":false,"alternatives":[{"id":12792,"text":"added filtration reduces average x-ray beam energy"},{"id":12793,"text":"doubling the filter atomic number doubles x-ray filtration"},{"id":12794,"text":"halving the filter density doubles filtration"},{"id":12791,"text":"long wavelength x-rays are more likely to be filtered"}],"archived":false,"correctAlternativeId":12791,"explanation":"\u003cp\u003eFiltration occurs via the photoelectric effect. The likelihood of the photoelectric effect increases linearly with increasing filter density and exponentially (cubic) with filter atomic number. \u003c/p\u003e\u003cp\u003eLower energy x-rays are more likely to be filtered. Frequency of x-ray radiation is proportional to x-ray energy. Therefore, low frequency (and high wavelength) x-rays are preferentially removed via filtration.\u003c/p\u003e\u003cp\u003eFiltration removes low energy x-rays and as a result the x-ray beam average energy (quality) increases as filtration increases.\u003c/p\u003e","id":2607,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2608","nextQuestionPath":"/articles/filters/questions/807","relatedArticles":[{"id":29684,"title":"Photoelectric effect","link":"/articles/photoelectric-effect?lang=us"},{"id":58714,"title":"Compensating filters","link":"/articles/compensating-filters?lang=us"}],"alsoUsedIn":[{"id":2000,"kind":"Course","title":"Imaging Physics: X-ray peer review - page 2000","link":"https://radiopaedia.org/courses/imaging-physics-x-ray-peer-review/pages/2000"},{"id":2000,"kind":"Course","title":"Imaging Physics: X-ray - page 2000","link":"https://radiopaedia.org/courses/imaging-physics-x-ray/pages/2000"},{"id":1556,"kind":"RestrictedPage","title":"Page 1556 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/1556"}],"stem":"\u003cp\u003eRegarding x-ray beam filtration which of the following is true?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/2607"}],"attemptsPercentages":[{"alternativeId":"12794","percentage":2},{"alternativeId":"12792","percentage":11},{"alternativeId":"12793","percentage":13},{"alternativeId":"12791","percentage":74}],"promptToLogin":false,"questionManager":false,"articleId":"filters"}