We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
  • ASTM E 1672 : 2012

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
    Add to Watchlist
    This Standard has been added successfully to your Watchlist.
    Please visit My Watchlist to see all standards that you are watching.
    Please log in or to add this standard to your Watchlist.
    We could not add this standard to your Watchlist.
    Please retry or contact support for assistance.
    You need to be logged in to add this standard to your Watchlist.
    Please log in now or create an account to add.
    You already added this Product in the Watchlist.

    Standard Guide for Computed Tomography (CT) System Selection

    Available format(s):  Hardcopy, PDF

    Superseded date:  23-12-2020

    Language(s):  English

    Published date:  25-09-2012

    Publisher:  American Society for Testing and Materials

    Add to Watchlist

    Add To Cart

    Scope - (Show below) - (Hide below)

    1.1 This guide covers guidelines for translating application requirements into computed tomography (CT) system requirements/specifications and establishes a common terminology to guide both purchaser and supplier in the CT system selection process. This guide is applicable to the purchaser of both CT systems and scan services. Computed tomography systems are complex instruments, consisting of many components that must correctly interact in order to yield images that repeatedly reproduce satisfactory examination results. Computed tomography system purchasers are generally concerned with application requirements. Computed tomography system suppliers are generally concerned with the system component selection to meet the purchaser's performance requirements. This guide is not intended to be limiting or restrictive, but rather to address the relationships between application requirements and performance specifications that must be understood and considered for proper CT system selection.

    1.2 Computed tomography (CT) may be used for new applications or in place of radiography or radioscopy, provided that the capability to disclose physical features or indications that form the acceptance/rejection criteria is fully documented and available for review. In general, CT has lower spatial resolution than film radiography and is of comparable spatial resolution with digital radiography or radioscopy unless magnification is used. Magnification can be used in CT or radiography/radioscopy to increase spatial resolution but concurrently with loss of field of view.

    1.3 Computed tomography (CT) systems use a set of transmission measurements made along a set of paths projected through the object from many different directions. Each of the transmission measurements within these views is digitized and stored in a computer, where they are subsequently conditioned (for example, normalized and corrected) and reconstructed, typically into slices of the object normal to the set of projection paths by one of a variety of techniques. If many slices are reconstructed, a three dimensional representation of the object is obtained. An in-depth treatment of CT principles is given in Guide E1441.

    1.4 Computed tomography (CT), as with conventional radiography and radioscopic examinations, is broadly applicable to any material or object through which a beam of penetrating radiation may be passed and detected, including metals, plastics, ceramics, metallic/nonmetallic composite material and assemblies. The principal advantage of CT is that it has the potential to provide densitometric (that is, radiological density and geometry) images of thin cross sections through an object. In many newer systems the cross-sections are now combined into 3D data volumes for additional interpretation. Because of the absence of structural superposition, images may be much easier to interpret than conventional radiological images. The new purchaser can quickly learn to read CT data because images correspond more closely to the way the human mind visualizes 3D structures than conventional projection radiology. Further, because CT images are digital, the images may be enhanced, analyzed, compressed, archived, input as data into performance calculations, compared with digital data from other nondestructive evaluation modalities, or transmitted to other locations for remote viewing. 3D data sets can be rendered by computer graphics into solid models. The solid models can be sliced or segmented to reveal 3D internal information or output as CAD files. While many of the details are generic in nature, this guide implicitly assumes the use of penetrating radiation, specifically X rays and gamma rays.

    1.5 UnitsThe values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.

    1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

    General Product Information - (Show below) - (Hide below)

    Committee E 07
    Document Type Guide
    Publisher American Society for Testing and Materials
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    ASTM E 1814 : 2014 Standard Practice for Computed Tomographic (CT) Examination of Castings

    Standards Referencing This Book - (Show below) - (Hide below)

    ASTM E 1316 : 2011 : REV B Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2015 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 1441 : 2000 : R2005 Standard Guide for Computed Tomography (CT) Imaging
    ASTM E 2339 : 2004 Standard Practice for Digital Imaging and Communication in Nondestructive Evaluation (DICONDE)
    ASTM E 1316 : 2009 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2008 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2010 : REV C Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2017 Standard Terminology for Nondestructive Examinations
    ASTM E 2767 : 2013 : R2018 Standard Practice for Digital Imaging and Communication in Nondestructive Evaluation (DICONDE) for X-ray Computed Tomography (CT) Test Methods
    ASTM E 1316 : 2013 : REV C Standard Terminology for Nondestructive Examinations
    ASTM E 2339 : 2011 Standard Practice for Digital Imaging and Communication in Nondestructive Evaluation (DICONDE)
    ASTM E 1316 : 2000 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 1441 : 2019 Standard Guide for Computed Tomography (CT)
    ASTM E 1316 : 2019 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2014 Standard Terminology for Nondestructive Examinations
    ASTM E 2339 : 2015 Standard Practice for Digital Imaging and Communication in Nondestructive Evaluation (DICONDE)
    ASTM E 1316 : 2013 : REV B Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2018 Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2011 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 2767 : 2010 Standard Practice for Digital Imaging and Communication in Nondestructive Evaluation (DICONDE) for X-ray Computed Tomography (CT) Test Methods
    ASTM E 1316 : 2007 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2015 Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2019 : REV B Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2013 : REV D Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2000 Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2019 Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2001 Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2003 Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2018 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2006 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2016 Standard Terminology for Nondestructive Examinations
    ASTM E 2339 : 2008 Standard Practice for Digital Imaging and Communication in Nondestructive Evaluation (DICONDE)
    ASTM E 1316 : 2002 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2014 : EDT 1 Standard Terminology for Nondestructive Examinations
    ASTM E 2339 : 2006 Standard Practice for Digital Imaging and Communication in Nondestructive Evaluation (DICONDE)
    ASTM E 1316 : 2010 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2013 Standard Terminology for Nondestructive Examinations
    ASTM E 1570 : 2011 Standard Practice for Computed Tomographic (CT) Examination
    ASTM E 1441 : 2011 Standard Guide for Computed Tomography (CT) Imaging
    ASTM E 1316 : 2017 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 1570 : 2000 : R2005 : EDT 1 Standard Practice for Computed Tomographic (CT) Examination
    ASTM E 2339 : 2010 Standard Practice for Digital Imaging and Communication in Nondestructive Evaluation (DICONDE)
    ASTM E 1316 : 2016 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2009 Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2002 Standard Terminology for Nondestructive Examinations
    ASTM E 2767 : 2011 Standard Practice for Digital Imaging and Communication in Nondestructive Evaluation (DICONDE) for X-ray Computed Tomography (CT) Test Methods
    ASTM E 1316 : 2004 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2007 : REV C Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2010 : REV B Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2013 : REV A Standard Terminology for Nondestructive Examinations
    ASTM E 2767 : 2013 Standard Practice for Digital Imaging and Communication in Nondestructive Evaluation (DICONDE) for X-ray Computed Tomography (CT) Test Methods
    ASTM E 1316 : 2007 : REV B Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2005 Standard Terminology for Nondestructive Testing
    ASTM E 1316 : 2004 Standard Terminology for Nondestructive Examinations
    ASTM E 1316 : 2007 Standard Terminology for Nondestructive Examinations
    ASTM E 1441 : 2000 Standard Guide for Computed Tomography (CT) Imaging
    ASTM E 1570 : 2000 Standard Practice for Computed Tomographic (CT) Examination
    ASTM E 1316 : 2012 Standard Terminology for Nondestructive Examinations
    • Access your standards online with a subscription

      Features

      • Simple online access to standards, technical information and regulations
      • Critical updates of standards and customisable alerts and notifications
      • Multi - user online standards collection: secure, flexibile and cost effective