The American Association of Physicists in Medicine (AAPM) is a nonprofit professional society whose primary purposes are to advance the science, education and professional practice of medical physics. The AAPM has more than 8,000 members and is the principal organization of medical physicists in the United States.The AAPM will periodically define new practice guidelines for medical physics practice to help advance the science of medical physics and to improve the quality of service to patients throughout the United States. Existing medical physics practice guidelines will be reviewed for the purpose of revision or renewal, as appropriate, on their fifth anniversary or sooner.Each medical physics practice guideline represents a policy statement by the AAPM, has undergone a thorough consensus process in which it has been subjected to extensive review, and requires the approval of the Professional Council. The medical physics practice guidelines recognize that the safe and effective use of diagnostic and therapeutic radiology requires specific training, skills, and techniques, as described in each document. Reproduction or modification of the published practice guidelines and technical standards by those entities not providing these services is not authorized.The following terms are used in the AAPM practice guidelines:
Must and Must Not: Used to indicate that adherence to the recommendation is considered necessary to conform to this practice guideline.Should and Should Not: Used to indicate a prudent practice to which exceptions may occasionally be made in appropriate circumstances.
RESUMOO desenvolvimento urbanístico do Rio de Janeiro apresenta influências marcantes. Originariamente, o traçado português caracterizou a demarcação das vias e a forma como se estabeleceram as edificações. Na evolução da cidade, em nome das modernidades, constatamos as influências francesa, inglesa e canônicas do urbanismo modernista a partir dos anos 50. A tradução disso pode ser constatada no processo de criação e conservação dos espaços livres de edificações, com ou sem vegetação, legitimando sua representatividade na análise desse viés do quadro urbano. A leitura das passagens de uma a outra influência na paisagem da cidade considera o largo do Machado, com suas transformações, como o espaço livre que atende plenamente à exemplificação dessa constatação.
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