128 S . Semghouli et al .: Radioprotection 2024 , 59 ( 2 ), 123 – 130
|
c |
|
d |
20 15 10 5 0 |
Foley et al ( 2012 )
Pulmonary embolism ( CTDIvol )
Kanal et al ( 2017 )
Geryes et al ( 2019 )
This study
|
600 500 400 300 200 100
0
|
Pulmonary embolism ( DLP )
Foley et al ( 2012 )
Kanal et al ( 2017 )
Geryes et al ( 2019 )
This study
|
Fig . 2 . DRL in terms of ( c ) CTDIvol and ( d ) DLP calculated by this study for pulmonary embolism indication compared to other previous studies .
lung disease ( CTDIvol ) lung disease ( DLP )
25 20 15 10 5 0 |
Danish Health Authority ( 2015 ) |
Public Health England ( 2016 )
Salama et al ( 2017 )
|
This study |
600 500 400 300 200 100
0
|
Danish Health Authority ( 2015 ) |
Public Health England ( 2016 ) |
Salama et al ( 2017 ) |
This study |
Fig . 3 . DRL in terms of ( e ) CTDIvol and ( f ) DLP calculated by this study for lung disease indication compared to other previous studies .
Sanderud et al . ( 2016 ) ( 30 mSv ). The mean effective doses for thoracic diagnostic CT-scans are 6.49 mSv , 6.72 mSv , and 4.44 mSv for pulmonary embolism , infectious lung disease , and COPD respectively . These values are all lower than the effective dose calculated by Sanderud et al . ( 2016 ) ( 7.7 mSv ). In this context , the use of effective doses can facilitate comparisons between doses administered through various diagnostic and therapeutic procedures , as well as in evaluating the radiation risks associated with different technologies , hospitals , or countries ( AAPM , 2008 ). Moreover , the significant difference in the radiation dose that patients receive may be due to factors linked to the equipment itself or to the different techniques used by practitioners ( Pedrosa et al ., 2023 ).
The results show a significant relationship between BMI and the effective dose and no relationship between gender , age , and the effective dose for CT radiotherapy planning CT . for diagnostic CT , there was a significant relationship between clinical indication , age , and the effective dose and no relationship between gender , BMI , and the effective dose . In addition , the results obtained in this study show differences in DRL between diagnostic CT scans and CT scans for radiotherapy planning , as well as a difference between clinical indications . Therefore , we suggest that prescribing physicians and radiologists consider clinical indications when managing thoracic CT scans . Note that a correlation between the exposure parameters and the effective dose is not useful since these parameters are linked to each other through constant factors .
4.4 Estimation of the risk of radiation-induced cancer :
The mean cancer risk calculated for radiotherapy planning CT-scans of the thorax is 715 per 1 million , which is higher than the mean cancer risk calculated for thoracic diagnostic CT-scans : pulmonary embolism ( 357 per 1 million ), infectious