Estimation and comparison of effective dose (E) in standard chest CT by organ dose measurements and dose-length-product methods and assessment of the influence of CT tube potential (energy dependency) on effective dose in a dual-source CT

2012 ◽  
Vol 81 (4) ◽  
pp. e507-e512 ◽  
Author(s):  
Jijo Paul ◽  
Rosemarie Banckwitz ◽  
Bernhard Krauss ◽  
Thomas J. Vogl ◽  
Werner Maentele ◽  
...  
Keyword(s):  
Potential Energy ◽  
Effective Dose ◽  
Organ Dose ◽  
Chest Ct ◽  
Dual Source Ct ◽  
Dose Length Product ◽  
Energy Dependency ◽  
Tube Potential ◽  
Dual Source ◽  
Dose Measurements

scholarly journals Whole Body Low Dose Computed Tomography Using Third-Generation Dual-Source Multidetector With Spectral Shaping: Protocol Optimization and Literature Review

Dose-Response ◽  
2020 ◽  
Vol 18 (4) ◽  
pp. 155932582097313
Author(s):  
Dario Baldi ◽  
Liberatore Tramontano ◽  
Vincenzo Alfano ◽  
Bruna Punzo ◽  
Carlo Cavaliere ◽  
...  
Keyword(s):  
Effective Dose ◽  
Low Dose ◽  
Whole Body ◽  
Dose Length Product ◽  
Osteolytic Lesions ◽  
Subjective Image Quality ◽  
Ct Dose ◽  
Dual Source ◽  
Ct Dose Index ◽  
Low Dose Computed Tomography

For decades, the main imaging tool for multiple myeloma (MM) patient’s management has been the conventional skeleton survey. In 2014 international myeloma working group defined the advantages of the whole-body low dose computed tomography (WBLDCT) as a gold standard, among imaging modalities, for bone disease assessment and subsequently implemented this technique in the MM diagnostic workflow. The aim of this study is to investigate, in a group of 30 patients with a new diagnosis of MM, the radiation dose (CT dose index, dose-length product, effective dose), the subjective image quality score and osseous/extra-osseous findings rate with a modified WBLDCT protocol. Spectral shaping and third-generation dual-source multidetector CT scanner was used for the assessment of osteolytic lesions due to MM, and the dose exposure was compared with the literature findings reported until 2020. Mean radiation dose parameters were reported as follows: CT dose index 0.3 ± 0.1 mGy, Dose-Length Product 52.0 ± 22.5 mGy*cm, effective dose 0.44 ± 0.19 mSv. Subjective image quality was good/excellent in all subjects. 11/30 patients showed osteolytic lesions, with a percentage of extra-osseous findings detected in 9/30 patients. Our data confirmed the advantages of WBLDCT in the diagnosis of patients with MM, reporting an effective dose for our protocol as the lowest among previous literature findings.

EFFECTIVE DOSE ESTIMATION FROM ORGAN DOSE MEASUREMENTS IN FAST-kV SWITCH DUAL ENERGY COMPUTED TOMOGRAPHY

2018 ◽  
Author(s):  
Justin Raudabaugh ◽  
Giao Nguyen ◽  
Carolyn Lowry ◽  
Natalie Januzis ◽  
James Colsher ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Effective Dose ◽  
Organ Dose ◽  
Dual Energy ◽  
Dose Estimation ◽  
Dual Energy Computed Tomography ◽  
Dose Measurements

scholarly journals High-Pitch Computed Tomography Coronary Angiography—A New Dose-Saving Algorithm: Estimation of Radiation Exposure

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
Dominik Ketelsen ◽  
Markus Buchgeister ◽  
Andreas Korn ◽  
Michael Fenchel ◽  
Bernhard Schmidt ◽  
...  
Keyword(s):  
Radiation Exposure ◽  
Effective Dose ◽  
Whole Body ◽  
High Pitch ◽  
Thermoluminescent Dosimeters ◽  
Tube Potential ◽  
Dose Saving ◽  
Dual Source ◽  
Males And Females ◽  
Female Specific

Purpose. To estimate effective dose and organ equivalent doses of prospective ECG-triggered high-pitch CTCA.Materials and Methods. For dose measurements, an Alderson-Rando phantom equipped with thermoluminescent dosimeters was used. The effective dose was calculated according to ICRP 103. Exposure was performed on a second-generation dual-source scanner (SOMATOM Definition Flash, Siemens Medical Solutions, Germany). The following scan parameters were used: 320 mAs per rotation, 100 and 120 kV, pitch 3.4 for prospectively ECG-triggered high-pitch CTCA, scan range of 13.5 cm, collimation  mm with z-flying focal spot, gantry rotation time 280 ms, and simulated heart rate of 60 beats per minute.Results. Depending on the applied tube potential, the effective whole-body dose of the cardiac scan ranged from 1.1 mSv to 1.6 mSv and from 1.2 to 1.8 mSv for males and females, respectively. The radiosensitive breast tissue in the range of the primary beam caused an increased female-specific effective dose of % compared to males. Decreasing the tube potential, a significant reduction of the effective dose of 35.8% and 36.0% can be achieved for males and females, respectively ().Conclusion. The radiologist and the CT technician should be aware of this new dose-saving strategy to keep the radiation exposure as low as reasonablly achievable.

scholarly journals High pitch third generation dual-source CT: Coronary and cardiac visualization on routine chest CT

2016 ◽  
Vol 10 (4) ◽  
pp. 282-288 ◽  
Author(s):  
Veit Sandfort ◽  
Mark A. Ahlman ◽  
Elizabeth C. Jones ◽  
Mariana Selwaness ◽  
Marcus Y. Chen ◽  
...  
Keyword(s):  
Chest Ct ◽  
Third Generation ◽  
Dual Source Ct ◽  
High Pitch ◽  
Dual Source ◽  
Routine Chest
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