Abstract
Background: Iterative reconstruction can be helpful to reduce radiation dose while maintaining image quality. However, this technique has not been fully evaluated in children during abdominal CT. Objective: To compare objective and subjective image quality between half-dose images reconstructed with iterative reconstruction at iteration strength levels 1 to 5 (half-S1 to half-S5 studies) and full-dose images reconstructed with filtered back projection (full studies) in pediatric abdominal CT. Materials and methods: Twenty-one children (M:F = 13:8; mean age 8.2 ± 5.7 years) underwent dual-source abdominal CT (mean effective dose 4.8 ± 2.1 mSv). The objective image quality was evaluated as noise. Subjective image quality analysis was performed comparing each half study to the full study for noise, sharpness, artifact and diagnostic acceptability. Results: Both objective and subjective image noise decreased with increasing iteration strength. Half-S4 and -S5 studies showed objective image noise similar to or lower than that of full studies. The half-S2 and -S3 studies produced the greatest sharpness and the half-S5 studies were the worst from a blocky appearance. Full and half studies did not differ in artifacts. Half-S3 studies showed the best diagnostic acceptability.Conclusion: Half-S4 and -S5 studies objectively and half-S3 studies subjectively showed comparable image quality to full studies in pediatric abdominal CT.
| Original language | English |
|---|---|
| Pages (from-to) | 188-193 |
| Number of pages | 6 |
| Journal | Pediatric Radiology |
| Volume | 45 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2015 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Pediatrics, Perinatology, and Child Health
- Radiology Nuclear Medicine and imaging
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Half-dose abdominal CT with sinogram-affirmed iterative reconstruction technique in children — comparison with full-dose CT with filtered back projection. / Lee, Minwook; Kim, Myung Joon; Han, Kyung Hwa; Lee, MiJung.
In: Pediatric Radiology, Vol. 45, No. 2, 01.01.2015, p. 188-193.Research output: Contribution to journal › Article
TY - JOUR
T1 - Half-dose abdominal CT with sinogram-affirmed iterative reconstruction technique in children — comparison with full-dose CT with filtered back projection
AU - Lee, Minwook
AU - Kim, Myung Joon
AU - Han, Kyung Hwa
AU - Lee, MiJung
PY - 2015/1/1
Y1 - 2015/1/1
N2 - Background: Iterative reconstruction can be helpful to reduce radiation dose while maintaining image quality. However, this technique has not been fully evaluated in children during abdominal CT. Objective: To compare objective and subjective image quality between half-dose images reconstructed with iterative reconstruction at iteration strength levels 1 to 5 (half-S1 to half-S5 studies) and full-dose images reconstructed with filtered back projection (full studies) in pediatric abdominal CT. Materials and methods: Twenty-one children (M:F = 13:8; mean age 8.2 ± 5.7 years) underwent dual-source abdominal CT (mean effective dose 4.8 ± 2.1 mSv). The objective image quality was evaluated as noise. Subjective image quality analysis was performed comparing each half study to the full study for noise, sharpness, artifact and diagnostic acceptability. Results: Both objective and subjective image noise decreased with increasing iteration strength. Half-S4 and -S5 studies showed objective image noise similar to or lower than that of full studies. The half-S2 and -S3 studies produced the greatest sharpness and the half-S5 studies were the worst from a blocky appearance. Full and half studies did not differ in artifacts. Half-S3 studies showed the best diagnostic acceptability.Conclusion: Half-S4 and -S5 studies objectively and half-S3 studies subjectively showed comparable image quality to full studies in pediatric abdominal CT.
AB - Background: Iterative reconstruction can be helpful to reduce radiation dose while maintaining image quality. However, this technique has not been fully evaluated in children during abdominal CT. Objective: To compare objective and subjective image quality between half-dose images reconstructed with iterative reconstruction at iteration strength levels 1 to 5 (half-S1 to half-S5 studies) and full-dose images reconstructed with filtered back projection (full studies) in pediatric abdominal CT. Materials and methods: Twenty-one children (M:F = 13:8; mean age 8.2 ± 5.7 years) underwent dual-source abdominal CT (mean effective dose 4.8 ± 2.1 mSv). The objective image quality was evaluated as noise. Subjective image quality analysis was performed comparing each half study to the full study for noise, sharpness, artifact and diagnostic acceptability. Results: Both objective and subjective image noise decreased with increasing iteration strength. Half-S4 and -S5 studies showed objective image noise similar to or lower than that of full studies. The half-S2 and -S3 studies produced the greatest sharpness and the half-S5 studies were the worst from a blocky appearance. Full and half studies did not differ in artifacts. Half-S3 studies showed the best diagnostic acceptability.Conclusion: Half-S4 and -S5 studies objectively and half-S3 studies subjectively showed comparable image quality to full studies in pediatric abdominal CT.
UR - http://www.scopus.com/inward/record.url?scp=84939895288&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84939895288&partnerID=8YFLogxK
U2 - 10.1007/s00247-014-3105-y
DO - 10.1007/s00247-014-3105-y
M3 - Article
C2 - 25030221
AN - SCOPUS:84939895288
VL - 45
SP - 188
EP - 193
JO - Pediatric Radiology
JF - Pediatric Radiology
SN - 0301-0449
IS - 2
ER -