The Optimal Parameter for Radiation Dose in Pediatric Low Dose Abdominal CT: Cross-sectional Dimensions versus Body Weight
Journal of the Korean Radiological Society
; : 169-175, 2008.
Article
in En
| WPRIM
| ID: wpr-151886
Responsible library:
WPRO
ABSTRACT
PURPOSE:
To investigate the best parameter between cross-sectional dimensions and body weight in pediatric low dose abdominal CT. MATERIALS ANDMETHODS:
One hundred and thirty six children consecutively underwent weight-based abdominal CT. The subjects consisted of group 1 (79 children, weight range 10.0-19.9 kg) and group 2 (57 children, weight range 20.0-39.9 kg). Abdominal cross-sectional dimensions including circumference, area, anteroposterior diameters and transverse diameters were calculated. Image noise (standard deviation of CT density) was measured by placing a region of interest in the posterior segment of the right hepatic lobe on a CT image at the celiac axis. The measured image noise was correlated with the cross-sectional abdominal dimensions and body weight for subjects in each group.RESULTS:
In group 1 subjects, area, circumference, transverse diameter, anteroposterior diameter, and body weight showed a significant positive correlation with image noise in descending order (gamma = 0.63, 0.62, 0.61, 0.51, and 0.49; p<0.0001). In group 2 subjects, transverse diameter, circumference, area, anteroposterior diameter, and body weight showed a significant positive correlation with image noise in descending order (gamma = 0.83, 0.82, 0.78, 0.71, and 0.71; p<0.0001).CONCLUSION:
Cross-sectional dimensions such as area, circumference, and transverse diameter showed a higher positive correlation with image noise than body weight for pediatric low dose abdominal CT.Key words
Full text:
1
Index:
WPRIM
Main subject:
Axis, Cervical Vertebra
/
Body Weight
/
Noise
Type of study:
Prevalence_studies
Limits:
Child
/
Humans
Language:
En
Journal:
Journal of the Korean Radiological Society
Year:
2008
Type:
Article