The document discusses the use of a dose monitoring system called DOSE for quality assurance and individual patient dosimetry purposes. The system was used for (A) trend analysis of radiation dose over time, (B) understanding clinical protocol usage, (C) comparing average radiation doses to national reference levels, (D) comparing radiation doses between CT devices, and (E) calculating patient-specific radiation doses. The results showed the system could track the effects of dose optimization efforts as mean radiation doses dropped after changes were implemented. It also provided insights into clinical practices and easy comparisons to guidelines.

1. Use of a dose monitoring system in routine QA
and individual patient dosimetry
J.Binst*, A. Dedulle, N. Marshall, N. Fitousi, H. Bosmans
(*joke.binst@uzleuven.be)
Introduction
• Dose justification & optimisation
• Big data load
→ Dose monitoring system
Materials and methods
Dose monitoring system DOSE
(Qaelum, Leuven, BE) used for:
A. Trend analysis
B. Knowledge on clinical use
C. Patient dosimetry survey
D. Compare devices
E. Patient specific dose calculations
Results and discussion
A. Trend analysis
Mean DLP for 3 months period in
2016 before optimisation exceeds
the national DRL. Mean DLP in 2017
after optimisation is underneath the
national DRL.
The dose optimisation can be
tracked. Mean DLP drops after dose
optimisation in Nov ‘16 triggered by
the national compliance monitoring.
B. Knowledge on clinical use
Knowledge on the clinically used
protocols or the number of pediatric
patients can be obtained.
C. Patient dosimetry survey
Mean DAP can easily be compared
with the national DRL.

2. Use of a dose monitoring system in routine QA
and individual patient dosimetry
J.Binst*, A. Dedulle, N. Marshall, N. Fitousi, H. Bosmans
(*joke.binst@uzleuven.be)
D. Compare devices
DLP distribution of several CT
devices can easily be compared.
E. Patient specific dose
calculations (1)
In Interventional Radiology, peak
skin dose mapping helps medical
doctors to follow-up patients at risk
for deterministic effects.
In CT, the new dose metric Size
Specific Dose Estimate is calculated
from actual patient images, taking
into account the patient size and
attenuation.
E. Patient specific dose
calculations (2)
In General Radiology, dose and
results from image quality
assessments can be shown along
each other.
After exposure of pregnant women
the dose to the fetus can easily be
evaluated with the use of virtual
anthropomorphic phantoms.
1 dose peak
3 dose peaks