Assessment of noise reduction potential and image quality improvement of a new generation adaptive statistical iterative reconstruction (ASIR-V) in chest CT

The British Journal of Radiology
Hui TangTaiping He

Abstract

To evaluate the image quality improvement and noise reduction in routine dose, non-enhanced chest CT imaging by using a new generation adaptive statistical iterative reconstruction (ASIR-V) in comparison with ASIR algorithm. 30 patients who underwent routine dose, non-enhanced chest CT using GE Discovery CT750HU (GE Healthcare, Waukesha, WI) were included. The scan parameters included tube voltage of 120 kVp, automatic tube current modulation to obtain a noise index of 14HU, rotation speed of 0.6 s, pitch of 1.375:1 and slice thickness of 5 mm. After scanning, all scans were reconstructed with the recommended level of 40%ASIR for comparison purpose and different percentages of ASIR-V from 10% to 100% in a 10% increment. The CT attenuation values and SD of the subcutaneous fat, back muscle and descending aorta were measured at the level of tracheal carina of all reconstructed images. The signal-to-noise ratio (SNR) was calculated with SD representing image noise. The subjective image quality was independently evaluated by two experienced radiologists. For all ASIR-V images, the objective image noise (SD) of fat, muscle and aorta decreased and SNR increased along with increasing ASIR-V percentage. The SD of 30% ASIR-V to 100% ASI...Continue Reading

References

Feb 5, 2010·Journal of Cardiovascular Computed Tomography·Bernhard BischoffJörg Hausleiter
Aug 26, 2016·Journal of Computer Assisted Tomography·Dominik C BenzPhilipp A Kaufmann
Feb 6, 2017·Saudi Journal of Biological Sciences·M AlkhorayefA Sulieman

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Citations

Jul 5, 2019·Korean Journal of Radiology : Official Journal of the Korean Radiological Society·Chankue ParkJin You Kim
Feb 13, 2020·La Radiologia medica·Massimo CristofaroVincenzo Schinina'
Jul 20, 2021·European Journal of Radiology·Narjes MoghadamMoulay Ali Nassiri

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