Radiation Dose Reduction via Sinogram Affirmed Iterative Reconstruction and Automatic Tube Voltage Modulation (CARE kV) in Abdominal CT
Korean Journal of Radiology
; : 886-893, 2013.
Article
in English
| WPRIM (Western Pacific)
| ID: wpr-219663
Responsible library:
WPRO
ABSTRACT
OBJECTIVE:
To evaluate the feasibility of sinogram-affirmed iterative reconstruction (SAFIRE) and automated kV modulation (CARE kV) in reducing radiation dose without increasing image noise for abdominal CT examination. MATERIALS ANDMETHODS:
This retrospective study included 77 patients who received CT imaging with an application of CARE kV with or without SAFIRE and who had comparable previous CT images obtained without CARE kV or SAFIRE, using the standard dose (i.e., reference mAs of 240) on an identical CT scanner and reconstructed with filtered back projection (FBP) within 1 year. Patients were divided into two groups group A (33 patients, CT scanned with CARE kV); and group B (44 patients, scanned after reducing the reference mAs from 240 to 170 and applying both CARE kV and SAFIRE). CT number, image noise for four organs and radiation dose were compared among the two groups.RESULTS:
Image noise increased after CARE kV application (p or = 0.108). Effective doses decreased by 19.4% and 41.3% for groups A and B, respectively (all, p < 0.001) after application of CARE kV with or without SAFIRE.CONCLUSION:
Combining CARE kV, reduction of mAs from 240 to 170 mAs and noise reduction by applying SAFIRE strength 3 or 4 reduced the radiation dose by 41.3% without increasing image noise compared with the standard-dose FBP images.
Full text:
Available
Database:
WPRIM (Western Pacific)
Main subject:
Radiation Dosage
/
Radiation Injuries
/
Algorithms
/
Radiography, Abdominal
/
Radiographic Image Interpretation, Computer-Assisted
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Retrospective Studies
/
Equipment Design
/
Multidetector Computed Tomography
Type of study:
Observational study
Limits:
Adult
/
Aged
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Aged, 80 and over
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Female
/
Humans
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Male
Language:
English
Journal:
Korean Journal of Radiology
Year:
2013
Document type:
Article