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FIG. 10. Detector crystallization. (a) The arrows in the top left-hand corner indicate a subtle artefact in the mediolateral oblique(MLO) view image that appears to mimic calcification. (b) The subsequent MLO view of the other breast indicates that the artefact isin fact caused by the a-Se detector beginning to crystallize. The window width and window level in this image have been adjusted tohighlight the problem. (c) A more obvious and serious example of a-Se detector crystallization is apparent in this image (see arrows).FIG. 11. The image on the left is a standard craniocaudal (CC) view of a breast, and the image on the right is the MLO view acquiredimmediately afterward. As indicated by the arrows, the CC view is still evident in the latter image. This is a totally unacceptableexample of a-Se detector image lag, caused in this instance by the room temperature not being high enough to maintain the detectortemperature at the required level.32
FIG. 12. An extreme example of motion artefact, in this instance caused by a CR cassette not being firmly locked in the cassette holderwhen the MLO view was acquired.33
Page 1 and 2: X raysdel matrixCs scintillatorLine
Page 3 and 4: QUALITY ASSURANCE PROGRAMMEFOR DIGI
Page 5 and 6: IAEA HUMAN HEALTH SERIES No. 17QUAL
Page 7 and 8: FOREWORDThe application of radiatio
Page 14: An effective QA programme is necess
Page 17 and 18: The Integrating the Healthcare Ente
Page 21 and 22: technology. Systems containing othe
Page 23 and 24: X raysTop electrodea-Se layerCharge
Page 25 and 26: dose received by inhomogeneous real
Page 27 and 28: 2.3.8.1. Soft copy displayFlat pane
Page 29 and 30: 3. ELEMENTS OF HIGH QUALITY MAMMOGR
Page 31: — The ability to mask edges of ma
Page 34 and 35: Disposal orsaleNew facility(start h
Page 36 and 37: 4.2.3. Radiographer (mammography te
Page 38 and 39: 5.2.2. Electronic versus geometric
Page 40 and 41: To allow full utilization of the di
Page 42 and 43: 5.7. ARTEFACTSWhile the incidence o
Page 46 and 47: FIG. 13. A more subtle example of a
Page 48 and 49: FIG. 16. An example of poor collima
Page 51 and 52: 7. RADIOGRAPHER’S QUALITY CONTROL
Page 53 and 54: 7.1. DAILY TESTS7.1.1. Monitor insp
Page 55 and 56: 7.1.3. Daily flat field phantom ima
Page 57 and 58: 7.1.4. Visual inspection for artefa
Page 59 and 60: 7.1.5. Laser printer sensitometry7.
Page 61 and 62: 7.1.6. Image plate erasure (CR syst
Page 63 and 64: FIG. 19. Modified TG18-QC pattern w
Page 65 and 66: FIG. 21. Radiologist workstation wi
Page 67 and 68: 7.2.1.6. Time frame for corrective
Page 69 and 70: 7.2.3. Weekly quality control test
Page 71 and 72: Note: It is not necessary to view t
Page 73 and 74: TABLE 7. TOLERANCES FOR IMAGING WEE
Page 75 and 76: 7.2.4.4. Interpretation of results
Page 77 and 78: 7.3.1.5. Recommendations and correc
Page 79 and 80: artefacts are typically best seen w
Page 81 and 82: 7.3.3.5. Recommendations and correc
Page 83 and 84: 7.4.1.3. Methodology(1) Annotate th
Page 85 and 86: RECORD OF DIGITAL MAMMOGRAPHY REPEA
Page 87 and 88: (3) Including examinations of at le
Page 89 and 90: 7.5. SEMI-ANNUAL TESTS7.5.1. Comput
Page 91 and 92: 8. MEDICAL PHYSICIST’S QUALITY CO
Page 93 and 94: 8.1. NOTE ON IMAGE NAMING CONVENTIO
Page 95 and 96:
(16) On any randomly selected patie
Page 97 and 98:
FIG. 30. Positioning of bathroom sc
Page 99 and 100:
(6) The target, filter, kV, grid, d
Page 101 and 102:
(2) Stack the 20 and 25 mm PMMA sla
Page 103 and 104:
TABLE 13. ACCEPTABLE AND ACHIEVABLE
Page 105 and 106:
8.5. DETECTOR PERFORMANCE8.5.1. Bas
Page 107 and 108:
8.5.2. Detector response and noise8
Page 109 and 110:
the service engineer responsible fo
Page 111 and 112:
(13) Using the annotation tool on t
Page 113 and 114:
Breast supportPMMA slabBreast suppo
Page 115 and 116:
(10) Place the thinner test object
Page 117 and 118:
8.6. EVALUATION OF SYSTEM RESOLUTIO
Page 119 and 120:
TABLE 17. ACCEPTABLE FREQUENCIES AT
Page 121 and 122:
8.7. X RAY EQUIPMENT CHARACTERISTIC
Page 123 and 124:
8.7.2. Incident air kerma at the en
Page 125 and 126:
8.8. DOSIMETRY8.8.1. Mean glandular
Page 127 and 128:
TABLE 21. ACCEPTABLE AND ACHIEVABLE
Page 129 and 130:
FIG. 34. Suggested layout for ruler
Page 131 and 132:
8.10. IMAGE DISPLAY QUALITYThe accu
Page 133 and 134:
FIG. 35. Modified TG18-QC test patt
Page 135 and 136:
8.10.1.5. Interpretation of results
Page 137 and 138:
8.10.2. Monitor luminance response
Page 139 and 140:
TABLE 22. MONITOR PERFORMANCE TOLER
Page 141 and 142:
FIG. 38. Measurement of illuminatio
Page 143 and 144:
8.11. LASER PRINTER8.11.1. Laser pr
Page 145 and 146:
8.11.1.5. Recommendations and corre
Page 147:
8.12.1.4. Interpretation of results
Page 150 and 151:
iopsies are performed, a sink is of
Page 152 and 153:
Appendix IISPECIFICATIONS OF TEST E
Page 154 and 155:
TABLE 24. SPECIFICATIONS OF TEST EQ
Page 156 and 157:
FIG. 40. Image acquired with a unif
Page 158 and 159:
FIG. 43. The left hand image is par
Page 160 and 161:
FIG. 45. A TG18-QC test pattern dis
Page 162 and 163:
[29] ALSAGER, A., YOUNG, K.C., ODUK
Page 165 and 166:
Annex IRADIOGRAPHER DATA COLLECTION
Page 167 and 168:
Chart 2 — DIGITAL MAMMOGRAPHY (DM
Page 169 and 170:
Chart 4 LASER PRINTER SENSITOMETRY
Page 171 and 172:
Chart 6 — WEEKLY DISPLAY MONITOR
Page 173 and 174:
Chart 7(b) WEEKLY QC TEST OBJECT:
Page 175 and 176:
Chart 9 — SAFETY AND FUNCTION CHE
Page 177 and 178:
Chart 11 — LASER PRINTER ARTEFACT
Page 179 and 180:
Chart 13(a) — RECORD OF DIGITAL M
Page 181 and 182:
Chart 14 — CR PLATE SENSITIVITY M
Page 183 and 184:
Annex IIITHE MAMMOGRAPHY EXTRACTThe
Page 185 and 186:
GLOSSARYair kerma. The energy depos
Page 187 and 188:
image quality. The overall merit of
Page 189:
CONTRIBUTORS TO DRAFTING AND REVIEW
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