1、Designation: E2934 13Standard Practice forDigital Imaging and Communication in NondestructiveEvaluation (DICONDE) for Eddy Current (EC) Test Methods1This standard is issued under the fixed designation E2934; the number immediately following the designation indicates the year oforiginal adoption or,
2、in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice facilitates the interoperability of eddycurrent imaging and data ac
3、quisition equipment by specifyingthe image data transfer and archival storage in commonlyaccepted terms. This document is intended to be used inconjunction with Practice E2339 on Digital Imaging andCommunication in Nondestructive Evaluation (DICONDE).Practice E2339 defines an industrial adaptation o
4、f the NEMAStandards Publication titled Digital Imaging and Communica-tions in Medicine (DICOM, see http:/medical.nema.org), aninternational standard for image data acquisition, review,storage and archival storage. The goal of Practice E2339,commonly referred to as DICONDE, is to provide a standardth
5、at facilitates the display and analysis of NDE results on anysystem conforming to the DICONDE standard. Toward thatend, Practice E2339 provides a data dictionary and a set ofinformation modules that are applicable to all NDE modalities.This practice supplements Practice E2339 by providing infor-mati
6、on object definitions, information modules and a datadictionary that are specific to eddy current test methods.1.2 This practice has been developed to overcome the issuesthat arise when analyzing or archiving data from eddy currenttest equipment using proprietary data transfer and storagemethods. As
7、 digital technologies evolve, data must remaindecipherable through the use of open, industry-wide methodsfor data transfer and archival storage. This practice defines amethod where all the eddy current technique parameters andinspection data are communicated and stored in a standardmanner regardless
8、 of changes in digital technology.1.3 This practice does not specify:1.3.1 A testing or validation procedure to assess an imple-mentations conformance to the standard,1.3.2 The implementation details of any features of thestandard on a device claiming conformance, or1.3.3 The overall set of features
9、 and functions to be ex-pected from a system implemented by integrating a group ofdevices each claiming DICONDE conformance.1.4 Although this practice contains no values that requireunits, it does describe methods to store and communicate datathat do require units to be properly interpreted. The val
10、uesstated in SI units are to be regarded as standard. No other unitsof measurement are included in this standard.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate sa
11、fety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E1316 Terminology for Nondestructive ExaminationsE2339 Practice for Digital Imaging and Communication inNondestructive Evaluation (DICONDE)2.2 NEMA Standards:3
12、Standard for Digital Imaging and Communications in Medi-cine (DICOM), 20093. Terminology3.1 Definitions:3.1.1 Nondestructive evaluation terms used in this practicecan be found in Terminology E1316.3.1.2 DICONDE terms used in this practice are defined inPractice E2339.4. Summary of Practice4.1 A fund
13、amental principle of DICONDE is the use ofstandard definitions and attribute formats for data communica-tion and storage. This means all systems that are DICONDEcompliant use a common data dictionary and common com-munication protocols. To further standardization, the elementsin the data dictionary
14、are organized into common groupsreferred to as information modules. The data dictionary and1This test method is under the jurisdiction of ASTM Committee E07 onNondestructive Testing and is the direct responsibility of Subcommittee E07.11 onDigital Imaging and Communication in Nondestructive Evaluati
15、on (DICONDE).Current edition approved July 1, 2013. Published July 2013. DOI: 10.1520/E2934132For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document
16、Summary page onthe ASTM website.3Available from National Electrical Manufacturers Association (NEMA), 1300N. 17th St., Suite 1752, Rosslyn, VA 22209, http:/www.nema.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1information modul
17、es common to all NDE modalities aredefined in Practice E2339.4.2 The data dictionary and information modules specifiedin Practice E2339 do not cover the information storagerequirements for each individual modality (ComputedTomography, Digital Radiography, Computed Radiography,Ultrasonic, etc.). Addi
18、tions to the data dictionary and informa-tion modules are required to support the individual modalities.This practice contains the additions to the DICONDE datadictionary and information modules necessary for eddy currentinspection.4.3 The highest organizational level in the DICONDEinformation model
19、 is the information object definition (IOD).The information object definition is a collection of informationmodules necessary to represent a set of examination resultsfrom a specific modality. This practice contains informationobject definitions necessary for eddy current inspection.5. Significance
20、and Use5.1 Personnel that are responsible for the creation, transfer,and storage of eddy current NDE test results will use thisstandard. This practice defines a set of information modulesthat along with the Practice E2339 and the DICOM standardprovides a standard means to organize eddy current testp
21、arameters and results. The eddy current examination resultsmay be displayed or analyzed on any device that conforms tothe standard. Personnel wishing to view any eddy currentexamination data stored according to Practice E2339 may usethis document to help them decode and display the datacontained in
22、the DICONDE compliant inspection record.6. Information Object Definitions6.1 Eddy Current Image IOD Description6.1.1 The Eddy Current (EC) Image Information ObjectDefinition specifies an image that has been created by an EddyCurrent imaging device for NDE purposes. The IOD definitionis found in Tabl
23、e 1. Note that eddy current has no equivalentmedical imaging modality. While the IOD definition utilizesstandard information modules from the DICOM standard thereexists no EC IOD within the DICOM standard.6.1.2 Since there is no EC IOD within the DICOM standardthe option of using a DICOM Standard Ex
24、tended Service-Object Pair (SOP) Class does not exist.ASOP Class Name andUnique Identifier (UID) have been provided to the EC IOD inTable 3. Note that since this is not a DICOM SOP Class, manystandard DICOM image display and storage tools may notaccept these images.6.2 Eddy Current Multi-Frame Image
25、6.2.1 The Eddy Current Multi-Frame (EC-MF) Image In-formation Object Definition specifies a multi-frame image thathas been created by an Eddy Current imaging device for NDEpurposes. The IOD definition is found in Table 2. Note thateddy current multi-frame has no equivalent medical imagingmodality. W
26、hile the IOD definition utilizes standard informa-tion modules from the DICOM standard there exists no EC-MFIOD within the DICOM standard.6.2.2 Since there is no EC-MF IOD within the DICOMstandard the option of using a DICOM Standard ExtendedService-Object Pair (SOP) Class does not exist. A SOP Clas
27、sName and Unique Identifier (UID) have been provided to theEC-MF IOD in Table 3. Note that since this is not a DICOMSOP Class, many standard DICOM image display and storagetools may not accept these images.TABLE 1 EC Image Information Object InformationDICOM Module DICONDE Module Reference UsageACom
28、ponent E2339, Section 7 MComponent Study E2339, Section 7 MComponent Series Section 7.1 MFrame of Reference DICOM Part 3 Section C.7.4.1 USynchronization DICOM Part 3 Section C.7.4.2 UNDE Equipment E2339, Section 7 MGeneral Image DICOM Part 3 Section C.7.6.1 MImage Pixel DICOM Part 3 Section C.7.6.3
29、 MPalette Color Lookup Table DICOM Part 3 Section C.7.9 C Required if Photometric Interpreta-tion (0028,0004) has a value of PAL-ETTE COLORDevice DICOM Part 3 Section C.7.6.12 UNDE EC Image Section 7.2 MOverlay Plane DICOM Part 3 Section C.7.9.2 UVOI LUT DICOM Part 3 Section C.7.11.2 USOP Common DIC
30、OM Part 3 Section C.7.12.1 MNDE EC Equipment Section 7.3 UNDE EC Equipment Settings Section 7.4 UNDE Indication E2339, Section 7 UNDE Geometry E2339, Section 7 UADefinition of usage codes can be found in Part 3 Section A.1.3 of the DICOM standard.TABLE 3 SOP Class DefinitionsSOP ClassNameSOP Class U
31、ID IOD SpecificationEddy CurrentImage Storage1.2.840.10008.5.1.4.1.1.601.1 EC IOD (See 6.1)Eddy CurrentMulti-FrameImage Storage1.2.840.10008.5.1.4.1.1.601.2 EC-MF IOD (See 6.2)E2934 1327. Information Modules7.1 Component Series Module7.1.1 The Component Series Module for eddy current im-ages will be
32、 as described in Practice E2339 Section 7, exceptas noted below.7.1.1.1 For eddy current images the Modality attribute(0008,0060) will have the value of EC.7.2 NDE EC Image Module7.2.1 Table 4 specifies the Attributes that describe NDEeddy current images.7.2.1.1 For NDE EC Images, Samples per Pixel
33、(0028,0002) is specified to use the following values for specifiedPhotometric Interpretations.7.2.1.2 For NDE EC Images, Photometric Interpretation(0028,0004) is specified to use the following defined terms. SeePart 3 Section C.7.6 of the DICOM standard for definitions ofthe terms:MONOCHROME2PALETTE
34、 COLORRGB7.2.1.3 For NDE EC Images, Bits Allocated (0028,0100) isspecified to use the following values for specified PhotometricInterpretations.7.2.1.4 For NDE EC Images, Bits Stored (0028,0101) isspecified to use the following values for specified PhotometricInterpretations.7.2.1.5 For NDE EC Image
35、s, Planar Configuration (0028,0006) is specified to use the following values for specifiedPhotometric Interpretations.7.2.1.6 For NDE EC Images, Pixel Representation (0028,0103) is specified to use the following Enumerated Value:0000H = unsigned integer0001H = signed integer7.2.1.7 For NDE EC multi-
36、frame images, the AttributeFrame Increment Pointer (0028,0009) of the Multi-frameModule (See DICOM Part 3 Section C.7.6.6) is specified bythe following defined terms:00181063 = sequencing by Frame Time (0018,1063)00181065 = sequencing by Frame Time Vector (0018,1065)TABLE 2 EC-MF Image Information O
37、bject DefinitionDICOM Module DICONDE Module Reference UsageAComponent E2339, Section 7 MComponent Study E2339, Section 7 MComponent Series Section 7.1 MFrame of Reference DICOM Part 3 Section C.7.4.1 USynchronization DICOM Part 3 Section C.7.4.2 UNDE Equipment E2339, Section 7 MGeneral Image DICOM P
38、art 3 Section C.7.6.1 MImage Pixel DICOM Part 3 Section C.7.6.3 MCine DICOM Part 3 Section C.7.6.5 MMulti-frame DICOM Part 3 Section C.7.6.6 MFrame Pointers DICOM Part 3 Section C.7.6.9 MPalette Color Lookup Table DICOM Part 3 Section C.7.9 C Required if Photometric Interpreta-tion (0028,0004) has a
39、 value of PAL-ETTE COLORDevice DICOM Part 3 Section C.7.6.12 UNDE EC Image Section 7.2 MVOI LUT DICOM Part 3 Section C.7.11.2 USOP Common DICOM Part 3 Section C.7.12.1 MNDE EC Equipment Section 7.3 UNDE EC Equipment Settings Section 7.4 UNDE Indication E2339, Section 7 UNDE Geometry E2339, Section 7
40、 UADefinition of usage codes can be found in Part 3 Section A.1.3 of the DICOM standard.TABLE 5 NDE EC Image Samples Per PixelPhotometric Interpretation Samples Per Pixel valueMONOCHROME2 1RGB 3PALETTE COLOR 1TABLE 6 NDE EC Image Bits AllocatedPhotometric Interpretation Bits Allocated ValueMONOCHROM
41、E2 8RGB 8PALETTE COLOR 8-8 bit palette or 16-16 bit paletteTABLE 7 NDE EC Image Bits StoredPhotometric Interpretation Bits Stored ValueMONOCHROME2 8RGB 8PALETTE COLOR 8-8 bit palette or 16-16 bit paletteTABLE 8 NDE EC Planar ConfigurationPhotometric Interpretation Planar Configuration ValueRGB 0colo
42、r by pixel, or 1color by planeE2934 1337.2.1.8 For NDE EC Images, Image Type (0008,0008) isspecified to be Type 2. The defined terms for value 3 are:C SCANB SCANA SCANSTRIP CHARTPHASE PLANEIMPEDANCE PLANEValue 4 contains information about the eddy current exami-nation mode. The defined terms for val
43、ue 4 are:ABSOLUTEDIFFERENTIALDOUBLE DIFFTANG CROSS AXISTABLE 4 NDE EC Image Module AttributesAttribute Name Tag VR VM Type DescriptionSamples per pixel (0028,0002) EC 1 1 Number of samples per pixel in this image.See 7.2.1.1.PhotometricInterpretation(0028,0004) CS 1 1 Specifies the intended interpre
44、tation of thepixel data. See 7.2.1.2.Bits Allocated (0028,0100) EC 1 1 Number of bits allocated for each pixel data.See 7.2.1.3.Bits Stored (0028,0101) EC 1 1 Number of bits stored for each pixel data.See 7.2.1.4.High Bit (0028,0102) EC 1 1 Most significant bit for pixel data.Planar Configuration (0
45、028,0006) EC 1 1C Indicates whether the pixel data is sent colorby plane or color by pixel. Required ifSamples Per Pixel (0028, 0002) has a valuegreater than 1. See 7.2.1.5.Pixel Representation (0028,0103) EC 1 1 Representation of pixel data. See 7.2.1.6.Frame IncrementPointer(0028,0009) AT 1-n 1C C
46、ontains the Data Element Tag of theattribute that is used as the frame incrementin multi-frame pixel data. Required if numberof frames is sent. See 7.2.1.7.Image Type (0008,0008) CS 1-n 1 Image identification characteristics. See7.2.1.8.Lossy ImageCompression(0028,2110) CS 1 1C Specifies whether an
47、image has undergonelossy compression. Enumerated Values:00 = NO lossy compression 01 = LossycompressionRequired if lossy compression has beenperformed on the image.Number of Surfaces (0008,2124) IS 1 3 Number of distinct scan surfaces on theinspection specimen.Number of TotalChannels(0008,212A) IS 1
48、 3 Number of examination channels associatedin this scan surfaceSurface Name (0008,2120) SH 1 3 Name of this scan surfaceSurface Number (0008,2122) IS 1 3 Number of this scan surfaceChannel Name (0008,2127) SH 1 3 Name of this examination channelChannel Number (0008,2128) IS 1 3 Number of this exami
49、nation channelPixel Data Type (0018,6014) US 1 3 The type of data encoded in the pixel data.See 7.2.1.9. for enumerated values.Pixel ValueTransformationSequence(0028,9145) QS 1 3 Contains the attributes involved in thetransformation of stored pixel values tophysical units.Rescale Intercept (0028,1052) DS 1 1C The value b in relationship between pixelvalues (PV) and output units.Output units = m*PV+bRequired value if sequence is present.Rescale Slope (0028,1052) DS 1 1C Parameter m in the equation specified byRescale Intercept (0028,1052)Required value if sequence is presen
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