核医学与分子影像学学会（SNMMI）是一个国际性的科学和专业组织，成立于1954年，旨在推广核医学的科学、技术和实际应用。欧洲核医学协会（EANM）是一个专业的非营利医学协会，促进世界范围内从事核医学临床和研究卓越的个人之间的交流。EANM成立于1985年。合并的国际磁共振医学学会（ISMRM）是一个国际性、非营利性的科学协会，其宗旨是促进磁共振在医学和生物学等相关领域的交流、研究、发展和应用，并为此领域的继续教育开设渠道和设施。ISMRM成立于1994年，是由磁共振医学学会和磁共振成像学会合并而成。SNMMI、ISMRM和EANM会员是从事核医学和/或磁共振成像研究与实践的医生、技师和科学家。SNMMI、ISMRM和EANM将定期制定新的核医学和/或磁共振成像实践指南，以推动核医学和/或磁共振成像的科学发展，并改善全球患者的服务质量。现有的实践指南将在其第五个周年或更早的适当时机进行审查修订或更新。每个实践指南都代表了SNMMI/EANM/ISMRM的政策声明，并经过了广泛的共识过程。SNMMI、ISMRM和EANM认识到，安全有效地使用诊断核医学成像和磁共振成像需要特定的培训、技能和技术，这些在每份文件中都有所描述。未提供这些服务的实体不被授权复制或修改已发布的实践指南。这些指南是一种旨在帮助从业者为患者提供适当护理的教育工具。它们不是不可变的规则或实践要求，也不是用来建立法律医疗标准的意图，不应使用它们来对临床医生的决策提出质疑。任何具体方法或行动的适当性最终判断必须由医生或医学物理师在考虑所有具体情况的基础上作出。因此，没必要将这些指南范围以外的方法认定为低于医疗标准。相反，当在从业者的合理判断下，患者的状况、可用资源的限制或在指南发表后的知识或技术进展指示的情况下，审慎从业者可以采用与指南不同的行动方案。医学实践包括预防、诊断、缓解和治疗疾病的艺术和科学。人类疾病的多样性和复杂性使得无法总是得出最适宜的诊断或对治疗的特定反应进行确定。因此，必须意识到遵守这些指南并不能确保准确的诊断或成功的治疗结果。只需期望从业者根据当前知识、可用资源和患者需求采取合理的行动，以提供有效和安全的医疗护理。这些指南唯一的目的就是协助从业者实现这个目标。© 2023. 作者们。

The Society of Nuclear Medicine and Molecular Imaging (SNMMI) is an international scientific and professional organization founded in 1954 to promote the science, technology, and practical application of nuclear medicine. The European Association of Nuclear Medicine (EANM) is a professional non-profit medical association that facilitates communication worldwide between individuals pursuing clinical and research excellence in nuclear medicine. The EANM was founded in 1985. The merged International Society for Magnetic Resonance in Medicine (ISMRM) is an international, nonprofit, scientific association whose purpose is to promote communication, research, development, and applications in the field of magnetic resonance in medicine and biology and other related topics and to develop and provide channels and facilities for continuing education in the field.The ISMRM was founded in 1994 through the merger of the Society of Magnetic Resonance in Medicine and the Society of Magnetic Resonance Imaging. SNMMI, ISMRM, and EANM members are physicians, technologists, and scientists specializing in the research and practice of nuclear medicine and/or magnetic resonance imaging. The SNMMI, ISMRM, and EANM will periodically define new guidelines for nuclear medicine practice to help advance the science of nuclear medicine and/or magnetic resonance imaging and to improve the quality of service to patients throughout the world. Existing practice guidelines will be reviewed for revision or renewal, as appropriate, on their fifth anniversary or sooner, if indicated. Each practice guideline, representing a policy statement by the SNMMI/EANM/ISMRM, has undergone a thorough consensus process in which it has been subjected to extensive review. The SNMMI, ISMRM, and EANM recognize that the safe and effective use of diagnostic nuclear medicine imaging and magnetic resonance imaging requires specific training, skills, and techniques, as described in each document. Reproduction or modification of the published practice guideline by those entities not providing these services is not authorized. These guidelines are an educational tool designed to assist practitioners in providing appropriate care for patients. They are not inflexible rules or requirements of practice and are not intended, nor should they be used, to establish a legal standard of care. For these reasons and those set forth below, the SNMMI, the ISMRM, and the EANM caution against the use of these guidelines in litigation in which the clinical decisions of a practitioner are called into question. The ultimate judgment regarding the propriety of any specific procedure or course of action must be made by the physician or medical physicist in light of all the circumstances presented. Thus, there is no implication that an approach differing from the guidelines, standing alone, is below the standard of care. To the contrary, a conscientious practitioner may responsibly adopt a course of action different from that set forth in the guidelines when, in the reasonable judgment of the practitioner, such course of action is indicated by the condition of the patient, limitations of available resources, or advances in knowledge or technology subsequent to publication of the guidelines. The practice of medicine includes both the art and the science of the prevention, diagnosis, alleviation, and treatment of disease. The variety and complexity of human conditions make it impossible to always reach the most appropriate diagnosis or to predict with certainty a particular response to treatment. Therefore, it should be recognized that adherence to these guidelines will not ensure an accurate diagnosis or a successful outcome. All that should be expected is that the practitioner will follow a reasonable course of action based on current knowledge, available resources, and the needs of the patient to deliver effective and safe medical care. The sole purpose of these guidelines is to assist practitioners in achieving this objective.© 2023. The Author(s).