Optimisation in CT - CT users group

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Optimisation • Equipment – quality control • Equipment – advances • Examinations – threshold exposure (DRLs) • Practice – optimisation includes justification
Automatic Exposure Control (AEC) • All modern manufacturers • Dose depends on tube rotation time and tube current (to a lesser extent kV) • Most common to vary mAs • preset algorithm
Page 1 and 2: A case for shared approach Optimisa
Page 3 and 4: Body CT 2007 Submillimetre sections
Page 5 and 6: Impact of new technique Tasks perfo
Page 7 and 8: Clinical Benefits of MSCT: new appl
Page 9: CT angiography
Page 12 and 13: Clinical benefits of MDCT Multiphas
Page 14 and 15: Acute Appendicitis: effect of incre
Page 16 and 17: Skull Limbs Chest Abdomen IVU Lumba
Page 18 and 19: Mettler at al, 2001 11% of examinat
Page 20 and 21: N o o f p a ts 140 120 100 80 60 40
Page 22 and 23: JRH cases over 1000 mGy-cm Brain 17
Page 25 and 26: Is this the age of imaging over-kil
Page 27: EC Directive 97/43 Justification Op
Page 31 and 32: Modifying the examination • Exten
Page 33 and 34: Modifying exposure CT of the chest:
Page 37 and 38: Image quality Im age quality 4.5 4.
Page 39 and 40: New work: Cervical and Lumbar Spine
Page 41 and 42: Fracture Image
Page 43 and 44: Experiment 2: dose reduction in the
Page 46 and 47: 7 6 5 4 3 2 1 0 10 20 30 40 Scores,
Page 48 and 49: Experiment 2: preliminary conclusio
Page 50 and 51: CT working group - 4 th Framework
Page 52 and 53: 14 applications 53 institutions 8 c
Page 54 and 55: Effective dose, mSv 30 25 20 15 10
Page 56 and 57: 6 th Framework Programme Prospectiv
Page 58 and 59: Justification in Optimisation • E
Page 60 and 61: Delayed diagnosis: ultra-low dose 1
Page 64 and 65: Effective justification Is there a
Page 66: Volume acquisition Acquisition time
Page 72 and 73: The Future More evidence is needed

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