The Design of Diagnostic Medical Facilities where ... - ResearchGate

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Appendix E: Schematic diagrams of radiation transmission paths (Figures E1 – E7 reproduced from WHO, Volume 1, 1974) Figure E.1: Radiation paths through shielding assemblies The sum of the radiations through all paths from Space S 2 to Space S 1 must not exceed the relevant dose constraints S 1 S 2 S 1 S 1 S 2 S 2 WHO 40213 a b c Figure E.2: Overlapping in shielding between lead and concrete The width of overlapping (b) must be at least as great as the thickness of concrete (t). b b t a b WHO 40214 Figure E.3: Protection on recesses in shielding The width of overlapping (b) must be at least as great as the thickness of concrete (t). b t a b WHO 40215 100 The Design of Diagnostic Medical Facilities where Ionising Radiation is used
Figure E.4: Shielding of perforations WHO 40216 a b c Figure E.5: Shielding of doors and doorframes The protective lead covering the door must overlap that of the doorframe by at least 1.5 cm. The protective lead covering the doorframe must overlap the concrete in the wall by at least the same amount as the thickness of concrete (t). ≥t 1.5 cm t Wall of concrete or brick Frame Lead-lined door WHO 40217 Lead-lined wall Lead-lined door Figure E.6: Shielding beneath doors not exposed to primary radiation Lead-lined door max. 1.5 cm Concrete floor WHO 40218 The Design of Diagnostic Medical Facilities where Ionising Radiation is used 101
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RPII 09/01 The Design of Diagnostic
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Foreword The original Code of Pract
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4. Nuclear medicine 35 4.1 Introduc
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1. Legal and administrative framewo
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e made as soon as possible. It shou
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It should be noted that it is the u
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Records should be kept as they will
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2. Identify the persons (staff and
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3.1.3 Computed Tomography (CT) CT a
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Photo 3.2: Interventional X‐ray r
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3.3 Radiography rooms 3.3.1 General
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X Figure 3.2: Dedicated chest room
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Figure 3.4: DXA room Operator’s c
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Figure 3.5b: A dental radiography s
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Radiation shielding calculations fo
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There are large variations in the s
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e assessed by the RPA as part of th
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The trailer must be sited in an are
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It is recognised worldwide that the
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The operator console should be loca
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Figure 4.3: A possible layout for a
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The workstation should be adequatel
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uptake probe and associated equipme
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The layout of the department should
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The control/console room should pro
Page 52 and 53: 5. Shielding calculations 5.1 Gener
Page 54 and 55: Table 5.2: Suggested minimum distan
Page 56 and 57: Table 5.4: Workload data from NCRP
Page 58 and 59: 5.2.4 Primary radiation A barrier i
Page 60 and 61: The primary beam will be attenuated
Page 62 and 63: 1 χ = ln αγ B −γ 1+ + β α
Page 64 and 65: . The reduction in the dose rate fr
Page 66 and 67: R D(t) = . t D(0) × t Equation 5.8
Page 68 and 69: 5.3.1 Radiology shielding calculati
Page 70 and 71: Example 2: Dedicated chest room (BI
Page 72 and 73: Example 4: Dental X‐ray room (BIR
Page 74 and 75: Example 6: Shielding required for a
Page 76 and 77: 6. Some practical considerations 6.
Page 78 and 79: 6.1.4 Brick There are many types of
Page 80 and 81: Walls are generally shielded to ful
Page 82 and 83: 6.3.3 Doors As illustrated in Chapt
Page 84 and 85: Photo 6.4 Lead blinds protecting wi
Page 86 and 87: Chapter 2). It is becoming common t
Page 88 and 89: Gaps in shielding are more likely t
Page 90 and 91: ICRP. 2007. Recommendations of the
Page 92 and 93: Appendices Appendix A: Dose limits
Page 94 and 95: Appendix C: Radiation transmission
Page 96 and 97: Figure C.1: Transmission of primary
Page 98 and 99: Figure C.5: 2 mm lead equivalent th
Page 100 and 101: Table D.3: Physical properties & ef
Page 104 and 105: Figure E.7: Shielding around the ed
Page 106 and 107: Figure F. 3: Sample radiation warni
Page 108 and 109: Notes 106 The Design of Diagnostic
Page 110: Notes 108 The Design of Diagnostic
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