Potential for lower absorbed dose in digital mammography: A JAFROC experiment using clinical hybrid images with simulated dose reduction

2006 ◽  
Author(s):  
Pontus Timberg ◽  
Mark Ruschin ◽  
Magnus Båth ◽  
Bengt Hemdal ◽  
Ingvar Andersson ◽  
...  
Keyword(s):  
Dose Reduction ◽  
Digital Mammography ◽  
Absorbed Dose

scholarly journals A technique optimization protocol and the potential for dose reduction in digital mammography

2010 ◽  
Vol 37 (3) ◽  
pp. 962-969 ◽  
Author(s):  
Nicole T. Ranger ◽  
Joseph Y. Lo ◽  
Ehsan Samei
Keyword(s):  
Dose Reduction ◽  
Digital Mammography ◽  
Technique Optimization

Validation of a Simulated Dose Reduction Methodology Using Digital Mammography CDMAM Images and Mastectomy Images

2010 ◽  
pp. 78-85 ◽  
Author(s):  
Mary Yip ◽  
Federica Zanca ◽  
Alistair Mackenzie ◽  
Adam Workman ◽  
Kenneth C. Young ◽  
...  
Keyword(s):  
Dose Reduction ◽  
Digital Mammography

scholarly journals Dual Energy on Dual Source CT in Abdominal Imaging

2020 ◽  
Author(s):  
Varchetta Francesco ◽  
Orlando Giuseppe ◽  
Laurenza Francesco ◽  
Rengo Alessandro ◽  
Danzi Roberta ◽  
...  
Keyword(s):  
Image Quality ◽  
Dose Reduction ◽  
Absorbed Dose ◽  
Dual Energy ◽  
Data Sets ◽  
Diagnostic Quality ◽  
Portal Phase ◽  
Phase Images ◽  
Dual Source ◽  
The Difference

Establish whether virtual non-contrast images can replace real non-contrast images, avoiding the preliminary scan, thus saving the patient dose. Forty-one patients were studied on a second-generation dual-source scanner, triphasic were applied on all patients, arterial and venous phase was acquired in dual-energy. HU values of TNC and VNC scans were compared through ROI on liver, spleen, kidneys, aorta, muscle, and fat. Qualitative analysis of the data sets was performed by four readers and the values from 1 to 4 (1. poor, 2. fair, 3. good, 4. excellent.) were assigned to define the diagnostic quality of the images. Then the absorbed dose ratios between the virtual images and the pre-contrast and portal phase images were compared. HU values were analyzed with the t-test and the difference was statistically significant P<0.0001. Image quality was evaluated as excellent or good in 91,3% of TNC and 81,6% of VNC. At last, VNC showed a sensitive dose reduction -46% compared to conventional triphasic protocol. Overall VNC has shown a good image quality comparable to TNC. The dose reduction obtained from the extraction of images without iodine, avoiding further scans, suggests the use of the dual-energy protocol in many exams.

scholarly journals Method for simulating dose reduction in digital mammography using the Anscombe transformation

2016 ◽  
Vol 43 (6Part1) ◽  
pp. 2704-2714 ◽  
Author(s):  
Lucas R. Borges ◽  
Helder C. R. de Oliveira ◽  
Polyana F. Nunes ◽  
Predrag R. Bakic ◽  
Andrew D. A. Maidment ◽  
...  
Keyword(s):  
Dose Reduction ◽  
Digital Mammography

scholarly journals Impact of Eye and Breast Shielding on Organ Doses During Cervical Spine Radiography: Design and Validation of MIRD Computational Phantom

2021 ◽  
Vol 9 ◽  
Author(s):  
Wiam Elshami ◽  
Huseyin Ozan Tekin ◽  
Shams A. M. Issa ◽  
Mohamed M. Abuzaid ◽  
Hesham M. H. Zakaly ◽  
...  
Keyword(s):  
Dose Reduction ◽  
Absorbed Dose ◽  
Relative Difference ◽  
Phantom Study ◽  
Tissue Cell ◽  
Anthropomorphic Phantom ◽  
Organ Doses ◽  
Target Organs ◽  
Cervical Spine Radiography ◽  
The Impact

Purpose: The study aimed to design and validate computational phantoms (MIRD) using the MCNPX code to assess the impact of shielding on organ doses.Method: To validate the optimized phantom, the obtained results were compared with experimental results. The validation of the optimized MIRD phantom was provided by using the results of a previous anthropomorphic phantom study. MIRD phantom was designed by considering the parameters used in the anthropomorphic phantom study. A test simulation was performed to compare the dose reduction percentages (%) between the experimental anthropomorphic phantom study and the MCNPX-MIRD phantom. The simulation was performed twice, with and without shielding materials, using the same number and locations of the detector.Results: The absorbed dose amounts were directly extracted from the required organ and tissue cell parts of output files. Dose reduction percentages between the simulation with shielding and simulation without shielding were compared. The highest dose reduction was noted in the thymus (95%) and breasts (88%). The obtained dose reduction percentages between the anthropomorphic phantom study and the MCNPX-MIRD phantom were highly consistent and correlated values with experimental anthropomorphic data. Both methods showed Relative Difference (%) ranges between 0.88 and 2.22. Moreover, the MCNPX-MIRD optimized phantom provides detailed dose analysis for target and non-target organs and can be used to assess the efficiency of shielding in radiological examination.Conclusion: Shielding breasts and eyes during cervical radiography reduced the radiation dose to many organs. The decision to not shield patients should be based on research evidence as this approach does not apply to all cases.

Are phantoms useful for predicting the potential of dose reduction in full-field digital mammography?

2005 ◽  
Vol 50 (8) ◽  
pp. 1851-1870 ◽  
Author(s):  
Gisella Gennaro ◽  
Luc Katz ◽  
Henri Souchay ◽  
Claudio Alberelli ◽  
Cosimo di Maggio
Keyword(s):  
Dose Reduction ◽  
Digital Mammography ◽  
Full Field ◽  
Full Field Digital Mammography
Sign in / Sign up

Export Citation Format

Share Document