Is It Better to Enter a Volume CT Dose Index Value before or after Scan Range Adjustment for Radiation Dose Optimization of Pediatric Cardiothoracic CT with Tube Current Modulation?
Korean Journal of Radiology
;
: 692-703, 2018.
Article
in English
| WPRIM
| ID: wpr-716266
ABSTRACT
OBJECTIVE:
To determine whether the body size-adapted volume computed tomography (CT) dose index (CTD(vol)) in pediatric cardiothoracic CT with tube current modulation is better to be entered before or after scan range adjustment for radiation dose optimization. MATERIALS ANDMETHODS:
In 83 patients, cardiothoracic CT with tube current modulation was performed with the body size-adapted CTDIvol entered after (group 1, n = 42) or before (group 2, n = 41) scan range adjustment. Patient-related, radiation dose, and image quality parameters were compared and correlated between the two groups.RESULTS:
The CTDIvol after the CT scan in group 1 was significantly higher than that in group 2 (1.7 ± 0.1 mGy vs. 1.4 ± 0.3 mGy; p 0.05). In both groups, all patient-related parameters, except body density, showed positive correlations (r = 0.49–0.94; p 0.05) in group 2.CONCLUSION:
In pediatric cardiothoracic CT with tube current modulation, the CTDIvol entered before scan range adjustment provides a significant dose reduction (18%) with comparable image quality compared with that entered after scan range adjustment.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Tomography, X-Ray Computed
/
Cone-Beam Computed Tomography
/
Noise
Limits:
Child
/
Humans
Language:
English
Journal:
Korean Journal of Radiology
Year:
2018
Type:
Article
Similar
MEDLINE
...
LILACS
LIS