ALARA is the acronym for "As Low As Reasonably Achievable." It is a radiation protection concept borne from the linear no-threshold (LNT) hypothesis. There are no valid data today supporting the use of LNT in the low-dose range, so dose as a surrogate for risk in radiological imaging is not appropriate, and therefore, the use of the ALARA concept is obsolete. Continued use of an outdated and erroneous principle unnecessarily constrains medical professionals attempting to deliver high-quality care to patients by leading to a reluctance by doctors to order images, a resistance from patients/parents to receive images, subquality images, repeated imaging, increased radiation exposures, the stifling of low-dose radiation research and treatment, and the propagation of radiophobia and continued endorsement of ALARA by regulatory bodies. All these factors result from the fear of radiogenic cancer, many years in the future, that will not occur. It has been established that the dose threshold for leukemia is higher than previously thought. A low-dose radiation exposure from medical imaging will likely upregulate the body's adaptive protection systems leading to the prevention of future cancers. The ALARA principle, as used as a radiation protection principle throughout medicine, is scientifically defunct and should be abandoned.

中文翻译：

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医疗领域使用的 ALARA 辐射防护原则的消亡。

ALARA 是“合理实现的最低限度”的缩写。它是从线性无阈值（LNT）假说衍生的辐射防护概念。目前没有有效数据支持在低剂量范围内使用 LNT，因此剂量作为放射成像风险的替代指标是不合适的，因此 ALARA 概念的使用已经过时。继续使用过时和错误的原则不必要地限制了试图为患者提供高质量护理的医疗专业人员，导致医生不愿意订购图像、患者/家长拒绝接收图像、图像质量低劣、重复成像、辐射增加辐射、低剂量辐射研究和治疗的抑制、辐射恐惧症的传播以及监管机构对 ALARA 的持续认可。所有这些因素都源于对放射源性癌症的恐惧，这种癌症在未来很多年里都不会发生。已经确定白血病的剂量阈值比以前认为的要高。医学成像的低剂量辐射可能会上调人体的适应性保护系统，从而预防未来的癌症。ALARA 原则在整个医学中用作辐射防护原则，但从科学角度来看已经失效，应该被放弃。