Details

Autor(en) / Beteiligte

• Schwartz, Fides
• Stieltjes, Bram
• Szucs-Farkas, Zsolt
• Euler, André

Titel

Over-scanning in chest CT: Comparison of practice among six hospitals and its impact on radiation dose

Ist Teil von

• European journal of radiology, 2018-05, Vol.102, p.49-54

Ort / Verlag

Ireland: Elsevier B.V

Erscheinungsjahr

2018

Quelle

MEDLINE

Beschreibungen/Notizen

• •There are significant amounts of over-scanning in chest CT.•The amount of over-scanning differs substantially between hospitals.•Effective and organ radiation dose increase due to over-scanning. Compare incidence of over-scanning in chest CT among six hospitals and impact on effective and organ effective radiation dose. Scout images of 600 chest CTs from six hospitals (A–F) were retrospectively reviewed using a radiation dose tracking software (RTS). Optimal scan range was determined and compared to the actual scan range. Incidence of cranial and caudal over-scanning was assessed and changes in total and organ effective dose were calculated. Descriptive statistics, Tukey- and Wilcoxon matched pairs test were applied. Simultaneous cranial and caudal over-scanning occurred in 29 of 600 scans (A = 0%, B = 1%, C = 12%, D = 3%, E = 11%, F = 2%). Effective radiation dose increased on average by 0.29 mSv (P < 0.001). Cranial over-scanning was observed in 45 of 600 scans (A = 0%, B = 8%, C = 2%, D = 15%, E = 17%, F = 3%) and increased organ effective dose by 0.35 mSv in the thyroid gland (P < 0.001). Caudal over-scanning occurred in 147 of 600 scans (A = 7%, B = 9%, C = 35%, D = 4%, E = 32%, F = 60%) and increased organ effective doses in the upper abdomen by up to 14% (P < 0.001 for all organs). Substantial differences in the incidence of over-scanning in chest CT exist among different hospitals. These differences result in excessive effective radiation dose and increased individual organ effective doses in patients.