Chiropractors, like other primary care providers, sometimes employ diagnostic imaging techniques such as X-rays and CT scans that rely on ionizing radiation.[156] Although there is no clear evidence for the practice, some chiropractors may still X-ray a patient several times a year.[6] Practice guidelines aim to reduce unnecessary radiation exposure,[156] which increases cancer risk in proportion to the amount of radiation received.[157] Research suggests that radiology instruction given at chiropractic schools worldwide seem to be evidence-based.[48] Although, there seems to be a disparity between some schools and available evidence regarding the aspect of radiography for patients with acute low back pain without an indication of a serious disease, which may contribute to chiropractic overuse of radiography for low back pain.[48]

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Most chiropractic medicine programs require that applicants have at least three years of undergraduate education, and an increasing number require a bachelor’s degree.  In either case, your undergraduate studies must include a prescribed number of prerequisite courses, as defined by the field’s accrediting body, the Council on Chiropractic Education.

Regulatory colleges and chiropractic boards in the U.S., Canada, Mexico, and Australia are responsible for protecting the public, standards of practice, disciplinary issues, quality assurance and maintenance of competency.[183][184] There are an estimated 49,000 chiropractors in the U.S. (2008),[185] 6,500 in Canada (2010),[186] 2,500 in Australia (2000),[28] and 1,500 in the UK (2000).[187]


Studies have not confirmed the effectiveness of prolotherapy or sclerotherapy for pain relief, used by some chiropractors, osteopaths, and medical doctors, to treat chronic back pain, the type of pain that may come on suddenly or gradually and lasts more than three months. The therapy involves injections such as sugar water or anesthetic in hopes of strengthening the ligaments in the back.
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