The purpose of this study was to characterize image quality and dose performance with GE CT iterative reconstruction techniques, adaptive statistical iterative recontruction (ASiR), and model-based iterative reconstruction (MBIR), over a range of typical to low-dose intervals using the Catphan 600 and the anthropomorphic Kyoto Kagaku abdomen phantoms. The scope of the project was to quantitativ...

BACKGROUND AND PURPOSE Some recent studies on radiation lens injuries have indicated much lower dose thresholds than specified by the current radiation protection guidelines. The purpose of this research was to measure the lens dose during brain CT scans with multidetector row CT and to assess methods for estimating the lens dose. MATERIALS AND METHODS With 8 types of multidetector row CT sca...

We report here the results of a dose evaluation based on information obtained in a 2011 questionnaire as compared with an investigation made in 2007. Briefly, in general radiography, the dose used in most examinations in 2011 was lower than in 2007. However, since the entrance surface dose for chest X-rays showed an increase, there is a need to standardize the taking of digital images to be abl...

Diagnostic Reference Level (DRL) is a method of optimizing patient doses in diagnostic and intervention procedures. The DRL value obtained from the Volumetric Computed Tomography Dose Index (CTDIvol) which phantom with diameter 16 cm or 32 cm, so it not yet possible to accurately estimate dose for each patient, especially pediatric patients. American Association Physicists Medicine (AAPM) then ...

A pelvimetry examination is sometimes prescribed to a pregnant woman at the end of her pregnancy in order assess dimensions pelvis prior childbirth. This has long been performed by using X-ray, but now increasingly being replaced CT-scan The objective this study radiation doses received during practical CT Hitashi Supria 16-slice scanner. were estimated Monte Carlo (MC)-based simulation with GA...

Background: High-resolution CT (HRCT) thorax has increase demand due to its advantage in diagnosing chronic respiratory diseases. The feasibility of matrix size with different tube voltage the HRCT protocol is unknown. Therefore, this study aimed compare effect sizes and on image quality radiation dose adult thorax. Methods: A Phantom experiment was performed, followed by...

Background: Positron Emission Tomography-Computed Tomography (PET-CT) is a useful hybrid imaging modality in the diagnosis of various malignancies. This modality imposes almost 20 mSv radiation dose to the patient. The purpose of the present study was to evaluate the uncertainties in calculated CT effective dose in TUBE CURRENT MODULATION-activated scans by Impact-Dose software.  Materials and ...

BACKGROUND Dual energy CT (DECT) has proven its potential in oncological imaging. Considering the repeated follow-up examinations, radiation dose should not exceed conventional single energy CT (SECT). Comparison studies on the same scanner with a large number of patients, considering patient geometries and image quality, and exploiting full potential of SECT dose reduction are rare. Purpose of...