Justifying imaging Flashcards
What factors may influence the justification of an image?
a. Pathology
b. Dose
c. Risk/benefit
d. Consent
e. Competence
Model of efficacy
Level 1 - technical efficacy diagnostic accuracy diagnostic thinking therapeutic efficacy patient outcome Level 6 - societal efficacy
How is technical efficacy measured?
Resolution of line pairs
Contrast detail resolution
Grey scale reproduction
Severity of arterfacts
How is diagnositc accuracy measured?
Sensitivity and specificity
How is diagnostic thinkign measured?
Proportion of cases in a series in which image judges to be helpful
Difference in clinicians subjective estimated diagnosis
How is therapeutic efficacy measured?
Proportion of cases in a series for which image judged to be helpful in planning treatment
Proportion of cases in which pre-imaging treatment plans were charged after imaging
How is patient outcome measured?
Proportion of patients imprved with imaging test
Morbidity avoided by imaging
Change in oral health relating to quality fo life
How id societal efficacy measured?
Benefit-cost analysis from a societal standpoint
cost-effectiveness analysiSIS
What is justification?
Process in which practicioner compares clincial history and examination, requests, with referral protocol, agrees total potential diagnostic and therapeutic benefits outweigh the detriment the exposure may cause
Describe 6 step plan for children?
No routine views fastest image receptor Collimation Thyroid collars Child size exposure Only CBCT when necessary
DAP?
Dose area product
- If DAP values not available what values should be recorded?
Kv, mA, time
