Keywords:
Dosimetric comparison, Radiation safety, Physics, Dosimetry, Digital radiography, Abdomen
Authors:
N. D. Vijfschagt1, M. Winter2, C. Borns3, A. Talsma3; 1Nijmegen/NL, 2Schuinesloot/NL, 3Groningen/NL
DOI:
10.1594/ecr2018/C-1393
Results
Figure 1. Effect of tube voltage and filtering
The LCD normalized for effective patient dose is fairly constant for all tube voltages and the lowest using 0,2 mm + 1 mm Al filtering.
Figure 2. Normalized LCD for different patient volumes
The normalized LCD per patient decreases from 6,08 (V20) to 10,03 µmAl (V30) using 0,2 mm + 1 mm Al filtering and using AEC S800.
Figure 3. Recommended X-abdomen protocol
The current protocol of the Martini Hospital uses tube voltage modulation and AEC S800.
This protocol does not lead to a constant LCD for all patient volumes.
A new protocol was designed with a constant LCD (6,48 µmAl) for all patient volumes using a constant tube voltage (90 kV),
0,2 mm + 1 mm Al filtering and tube current modulation using different types of AEC and density corrections.