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Combining low tube voltage and iterative reconstruction for contrast-enhanced CT imaging of the chest-initial clinical experience
Combining low tube voltage and iterative reconstruction for contrast-enhanced CT imaging of the chest-initial clinical experience
- Source :
- Clinical radiology. 68(5)
- Publication Year :
- 2012
-
Abstract
- Aim To evaluate the image quality of contrast-enhanced chest computed tomography (CT) with low tube voltage settings using an iterative reconstruction algorithm (iDose4) and standard dose filtered back projection (FBP) CT in patients with normal body mass index (BMI). Materials and methods Eighty patients with normal BMI were referred for a contrast-enhanced chest CT. Patients were randomly assigned into two groups: 120 kVp and 80 kVp. Standard convolution FBP was used to reconstruct the 120 kVp group (A) and 80 kVp group (C) image sets and iterative reconstruction (iDose4) was used to reconstruct the 80 kVp group (B) image sets. The mean image noise, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and effective dose (ED) were calculated for each protocol. Image quality was graded (scale: 1–3) and compared among the three groups. Results The radiation dose was 71.35% less for the low-voltage protocol. Noise was significantly lower in the low-voltage images reconstructed with iDose4 (group B) compared with images reconstructed with FBP (group C). Group B had the highest SNR and CNR. There was no difference in subjective image quality scores between groups B and A ( p > 0.05). Conclusions Compared with standard FBP reconstruction, the iDose4 iterative reconstruction yields higher SNR, CNR, and better image quality in contrast-enhanced chest CT with low tube voltage settings.
- Subjects :
- Male
medicine.medical_specialty
Image quality
Radiography
Contrast Media
Image processing
Iterative reconstruction
Signal-To-Noise Ratio
Radiation Dosage
Triiodobenzoic Acids
medicine
Image noise
Image Processing, Computer-Assisted
Humans
Radiology, Nuclear Medicine and imaging
Observer Variation
Radon transform
business.industry
Low tube voltage
General Medicine
Middle Aged
Radiographic Image Enhancement
Radiographic Image Interpretation, Computer-Assisted
Female
Radiography, Thoracic
Tomography
Radiology
Nuclear medicine
business
Tomography, X-Ray Computed
Algorithms
Subjects
Details
- ISSN :
- 1365229X
- Volume :
- 68
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- Clinical radiology
- Accession number :
- edsair.doi.dedup.....fa8927481ed27c61057fae6065a6f5d4