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Original research article

Feasible Dose Reduction in Routine Chest Computed Tomography Maintaining Constant Image Quality Using the Last Three Scanner Generations: From Filtered Back Projection to Sinogram-affirmed Iterative Reconstruction and Impact of the Novel Fully Integr

Lukas EbnerFelix KnoblochAdrian HuberJulia LandauDaniel OttJohannes T HeverhagenAndreas Christe
Department of Diagnostic, Interventional and Pediatric Radiology, Inselspital, Bern University Hospital, Freiburgstrasse, Bern, Switzerland
Date of Submission: 13-Mar-2014, Date of Acceptance: 20-Jun-2014, Date of Web Publication: 30-Jul-2014.
Corresponding Author:
Corresponding Author

Lukas Ebner

E-mail: Lukas.ebner@insel.ch

Corresponding Author:
Corresponding Author

Lukas Ebner

E-mail: Lukas.ebner@insel.ch

DOI: 10.4103/2156-7514.137826 Facebook Twitter Google Linkedin


Objective: The aim of the present study was to evaluate a dose reduction in contrast-enhanced chest computed tomography (CT) by comparing the three latest generations of Siemens CT scanners used in clinical practice. We analyzed the amount of radiation used with filtered back projection (FBP) and an iterative reconstruction (IR) algorithm to yield the same image quality. Furthermore, the influence on the radiation dose of the most recent integrated circuit detector (ICD; Stellar detector, Siemens Healthcare, Erlangen, Germany) was investigated.
Materials and Methods: 136 Patients were included. Scan parameters were set to a thorax routine: SOMATOM Sensation 64 (FBP), SOMATOM Definition Flash (IR), and SOMATOM Definition Edge (ICD and IR). Tube current was set constantly to the reference level of 100 mA automated tube current modulation using reference milliamperes. Care kV was used on the Flash and Edge scanner, while tube potential was individually selected between 100 and 140 kVp by the medical technologists at the SOMATOM Sensation. Quality assessment was performed on soft-tissue kernel reconstruction. Dose was represented by the dose length product.
Results: Dose-length product (DLP) with FBP for the average chest CT was 308 mGy*cm ± 99.6. In contrast, the DLP for the chest CT with IR algorithm was 196.8 mGy*cm ± 68.8 (P = 0.0001). Further decline in dose can be noted with IR and the ICD: DLP: 166.4 mGy*cm ± 54.5 (P = 0.033). The dose reduction compared to FBP was 36.1% with IR and 45.6% with IR/ICD. Signal-to-noise ratio (SNR) was favorable in the aorta, bone, and soft tissue for IR/ICD in combination compared to FBP (the P values ranged from 0.003 to 0.048). Overall contrast-to-noise ratio (CNR) improved with declining DLP.
Conclusion: The most recent technical developments, namely IR in combination with integrated circuit detectors, can significantly lower radiation dose in chest CT examinations.
Keywords: Dose Reduction, Low-dose CT, Stellar Detector

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  4. Ullrich G. Mueller-Lisse, Larissa Marwitz, Amanda Tufman, Rudolf M. Huber, Hanna A. Zimmermann, Annemarie Walterham, Stefan Wirth and Marco Paolini (2018) Less radiation, same quality: contrast-enhanced multi-detector computed tomography investigation of thoracic lymph nodes with one milli-sievert. Radiol med 123(11):818. doi: 10.1007/s11547-018-0915-2
  5. James A. Meltzer, Melvin E. Stone, Srinivas H. Reddy and Ellen J. Silver (2018) Association of Whole-Body Computed Tomography With Mortality Risk in Children With Blunt Trauma. JAMA Pediatr 172(6):542. doi: 10.1001/jamapediatrics.2018.0109
  6. J. Ley-Zaporozhan and S. Ley (2014) HRCT-Technik mit Low-dose-Protokollen bei interstitiellen Lungenerkrankungen. Radiologe 54(12):1153. doi: 10.1007/s00117-014-2733-4
  7. Mannudeep K. Kalra (2017) Quality and Safety in Imaging. (Chapter 85):49. doi: 10.1007/174_2017_85
  8. G. Schönberg, J. P. Radtke and M. Hohenfellner (2018) Management des Schwerverletzten. (Chapter 21):253. doi: 10.1007/978-3-662-54980-3_21
  9. Sandra S. Halliburton and Prabhakar Rajiah (2016) Cardiac CT Scanner Technology: What Is New and What Is Next?. Curr Cardiovasc Imaging Rep 9(3):. doi: 10.1007/s12410-016-9370-4
  10. Michael Esser, Sergios Gatidis, Matthias Teufel, Inés Ketelsen, Konstantin Nikolaou, Jürgen F. Schäfer and Ilias Tsiflikas (2017) Contrast-Enhanced High-Pitch Computed Tomography in Pediatric Patients Without Electrocardiography Triggering and Sedation. Journal of Computer Assisted Tomography 41(1):165. doi: 10.1097/RCT.0000000000000482

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