Initial results of a new generation dual source CT system using only an in-plane comb filter for ultra-high resolution temporal bone imaging
Objectives: To prospectively evaluate radiation dose and image quality of a third generation dual-source CT (DSCT) without z-axis filter behind the patient for temporal bone CT. Methods: Forty-five patients were either examined on a first, second, or third generation DSCT in an ultra-high-resolution...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
8 September 2014
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| In: |
European radiology
Year: 2014, Volume: 25, Issue: 1, Pages: 178-185 |
| ISSN: | 1432-1084 |
| DOI: | 10.1007/s00330-014-3406-4 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1007/s00330-014-3406-4 Verlag, Volltext: https://link-springer-com.ezproxy.medma.uni-heidelberg.de/article/10.1007/s00330-014-3406-4 
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| Author Notes: | Mathias Meyer, Holger Haubenreisser, Rainer Raupach, Bernhard Schmidt, Florian Lietzmann, Christianne Leidecker, Thomas Allmendinger, Thomas Flohr, Lothar R. Schad, Stefan O. Schoenberg, Thomas Henzler |
| Summary: | Objectives: To prospectively evaluate radiation dose and image quality of a third generation dual-source CT (DSCT) without z-axis filter behind the patient for temporal bone CT. Methods: Forty-five patients were either examined on a first, second, or third generation DSCT in an ultra-high-resolution (UHR) temporal bone-imaging mode. On the third generation DSCT system, the tighter focal spot of 0.2 mm2 removesthe necessity for an additional z-axis-filter, leading to an improved z-axis radiation dose efficiency. Images of 0.4 mm were reconstructed using standard filtered-back-projection or iterative reconstruction (IR) technique for previous generations of DSCT and a novel IR algorithm for the third generation DSCT. Radiation dose and image quality were compared between the three DSCT systems. Results: The statistically significantly highest subjective and objective image quality was evaluated for the third generation DSCT when compared to the first or second generation DSCT systems (all p < 0.05). Total effective dose was 63 %/39 % lower for the third generation examination as compared to the first and second generation DSCT. Conclusions: Temporal bone imaging without z-axis-UHR-filter and a novel third generation IR algorithm allows for significantly higher image quality while lowering effective dose when compared to the first two generations of DSCTs. |
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| Item Description: | Gesehen am: 11.08.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1432-1084 |
| DOI: | 10.1007/s00330-014-3406-4 |