IEC 60336-2020 pdf free download – Medical electrical equipment – X-ray tube assemblies for medical diagnosis – Focal spot dimensions and related characteristics.
This document applies to FOCAL SPOTs in medical diagnostic X- RAYTUBE ASSEMBLIES for medicaluse, operating at ×- RAY TUBE VOLTAGEs up to and including 150 kV.
This document describes the test methods employing digital detectors for determining:
a) FOCAL sPoT dimensions in terms of NOMINAL FOCAL SPOT VALUEs , ranging from 0,1 to 3,0;b)LINE SPREAD FUNGTIONS ;
c) one-dimensional MODULATION TRANSFER FUNCTIONS ;d)FOCAL SPOT PINHOLE RADIOGRAMS ,
and the means for indicating compliance.
ln informative annexes,STAR PATTERN imaging and BLOOMING vALuE are described.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies.
For undatedreferences,the latestedition of the referenced document (including anyamendments) applies.
IEC 60417, Graphical symbols for use on equipment(available at http:/www.graphical-symbols.infolequipment)
IEC 60601-1:2005,Medical electrical equipment – Part 1: General requirements for basic safetyand essential performance
lEC 60601-1:2005/AMD1:2012
IEC 60601-1-3:2008, Medical electrical equipment -Part 1-3:General requirements for basicsafety and essential performance – Collateral Standard: Radiation protection in diagnostic X-ray equipment
lEc 6o601-1-3:2008/AMD1:2013
IEC 60613:2010,Electrical and loading characteristics of x-ray tube assemblies for medicaldiagnosis
IEC TR 60788:2004,Medical electrical equipment – Glossary of defined terms
3Terms and definitions
For the purposes of this document,terms and definitions given in lEC TR 60788:2004,IEC 60613:2010，IEC 60601-1:2005 and IEC 60601-1:2005/AMD1:2012,IEC 60601-1-3:2008and IEC 60601-1-3:2008/AMD1:2013 and the following apply.
ISo and IEC maintain terminological databases for use in standardization at the followingaddresses:
-IEC Electropedia: available at http://www.electropedia.orgl
. Iso Online browsing platform: available at http://www.iso.orglobp
3.1
ACTUAL FOCAL SPo
area on the surface of the TARGET that intercepts the beam of accelerated particles
Note 1 to entry: Regarding accelerated particles,only the intended primary beam is included.3.2
BLOOMING VALUE
ratio of two resolution limits obtained under specific
LOADING conditions
Nole 1 to entry: The BLooMING vALuE is a characteristic of the EFFECTIVE FOCAL SPOT of an X-RAYTUBE，3.3
DIGITAL FOCAL sPOT DETECTOR
pixel-array device applied to FOCAL SPoT analysis of X-RAY TUBE ASSEMBLIEs , providing a digitaloutput value per pixel which is linearly related to the input X-ray intensity
3.4
EFFECTIVE FOCAL sPoTFOCAL sPOT
perpendicular PROJECTION of the ACTUAL FOCAL SPoT on the REFERENCE PLANE
3.5
FOCAL sPoT PINHOLE RADIOGRAM
RADIOGRAM obtained by means of a PINHOLE CAMERA , showing the shape and orientation of anEFFECTIVE FOCAL SPOT, and the spatial distribution of intensity of radiation across it
3.6
FOCAL SPoT SLIT RADIOGRAM
RADIOGRAM obtained by means of a sLIT CAMERA , showing the distribution, across an EFFECTIEFOCAL SPOT，in the direction normal to the length of the slit,of the intensity of the radiationemitted
3.7
FOCAL sPoT STAR RADIOGRAM
RADIOGRAM obtained by means of a STAR PATTERN CAMERA for the determination of the STARPATTERN RESOLUTION LIMIT in one or more directions across an EFFECTIVE FOCAL SPOT
3.8
NOMINAL FOCAL SPoT VALUE
dimensionless numerical value having a specific relation to the dimensions of the EFFECTVEFOCAL SPOT of an X- RAY TUBE , measured under specific conditions
3.9
PINHOLE CAMERA
assembly of EQUIPMENT used to obtain a FOCAL SPOT PINHOLE RADIOGRAM
3.10
REFERENCE AXIS
< RADIATION SOURCE > line in the REFERENCE DIRECTION through the centre of the RADIATION SOURCE.IEC 60336 pdf download.