NewTom VG User Manual rev 4.0 - Image Works

Index
6.1.1 Preparing the patient ....................................................................................................................... 31
6.1.2 Positioning the patient and starting a new scan.............................................................................. 33
6.2 SCANNING A DENTURE.............................................................................................................................. 35
6.2.1 Preliminary operations..................................................................................................................... 35
6.2.2 Denture positioning ......................................................................................................................... 35
7 QUALITY ASSURANCE.......................................................................................................................... 36
7.1 PHANTOM POSITIONING ............................................................................................................................ 36
7.2 SAMPLE IMAGES....................................................................................................................................... 38
7.3 STORAGE OF QA DATA............................................................................................................................. 38
8 TROUBLESHOOTING............................................................................................................................. 39
8.1 COMMUNICATIONS PROBLEM..................................................................................................................... 39
8.2 ROTATING ARM......................................................................................................................................... 39
8.3 IMAGE ACQUISITION .................................................................................................................................. 39
9 IEC61223: ACCEPTANCE TEST............................................................................................................ 40
9.1 POSITIONING OF THE PATIENT SUPPORT [PARAGRAPH 5.1].......................................................................... 40
9.2 PATIENT POSITIONING ACCURACY [PARAGRAPH 5.2]................................................................................... 40
9.2.1 Axial patient positioning accuracy [paragraph 5.2.1] ...................................................................... 40
9.2.2 Sagittal and coronal patient positioning light [paragraph 5.2.2] ...................................................... 40
9.3 TOMOGRAPHIC SECTION THICKNESS [PARAGRAPH 5.3]............................................................................... 40
9.3.1 Tomographic section thickness for axial scanning [paragraph 5.3.1] ............................................. 40
9.3.2 Tomographic section thickness for helical scanning [paragraph 5.3.2] .......................................... 40
9.4 DOSE [PARAGRAPH 5.4]............................................................................................................................ 40
9.5 NOISE, MEAN CT NUMBER AND UNIFORMITY [PARAGRAPH 5.5] ................................................................... 40
9.6 SPATIAL RESOLUTION [PARAGRAPH 5.6] .................................................................................................... 40
9.7 IEC 61223-3-5 REFERENCE TABLE........................................................................................................... 41
APPENDIX A: TECHNICAL REFERENCE .................................................................................................. 43
APPENDIX B: STANDARDS CONFORMITY .............................................................................................. 63
APPENDIX C: LABELS ................................................................................................................................ 65
Rev. 1.0 - 02/15/2009 Page 4 of 72