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Intl. Congress form | International Congress Report | International Congress Report For Faculty | 2016- 58th AAPM Annual Meeting& Exhibition, JULY 31-AUGUST 4, WASHINGTON DC

2016- 58th AAPM Annual Meeting& Exhibition, JULY 31-AUGUST 4, WASHINGTON DC
The report of 2016- 58th AAPM Annual Meeting& Exhibition, JULY 31-AUGUST 4, WASHINGTON DC by Dr. Nader Riyahi Alam
Application Code :
306-0216-0106
 
Created Date : Wednesday, September 7, 2016-15:47 15:47:49Update Date : Sunday, October 16, 2016-16:18 16:18:42
IP Address : 194.225.51.101Submit Date : Sunday, October 16, 2016-16:18 16:18:49Email : riahialam@gmail.com
Personal Information
Name : nader
Surname : riyahi alam
School/Research center : School of Medicine
If you choose other, please name your Research center :  
Position : Professor
Tel : +98-21-88973653
Information of Congress
Title of the Congress : 2016- 58th AAPM Annual Meeting& Exhibition, JULY 31-AUGUST 4, WASHINGTON DC
Title of your Abstract : Patient Organ Specific Dose Assessment in Coronary CT Angiograph Using Voxellaized Volume Dose Index in
Monte Carlo Simulation
Destination Country : United States
From : Sunday, July 31, 2016
To : Thursday, August 4, 2016
Abstract(Please copy/paste the abstract send to the congress) :
Purpose:
Clinical use of multi detector computed tomography(MDCT) in diagnosis of diseases due to high
speed in data acquisition and high spatial resolution is significantly increased. Regarding to the
high radiation dose in CT and necessity of patient specific radiation risk assessment, the adoption
of new method in the calculation of organ dose is completely required and necessary. In this
study by introducing a conversion factor, patient organ dose in thorax region based on CT image
data using MC system was calculated.
Methods:
The geometry of x-ray tube, inherent filter, bow tie filter and collimator were designed using
EGSnrc/BEAMnrc MC-system component modules according to GE-Light-speed 64-slices CTscanner geometry. CT-scan image of patient thorax as a specific phantom was voxellised with
6.25mm3 in voxel and 64x64x20 matrix size. Dose to thorax organ include esophagus, lung,
heart, breast, ribs, muscle, spine, spinal cord with imaging technical condition of prospectivelygated-coronary CT-Angiography(PGT) as a step and shoot method, were calculated. Irradiation
of patient specific phantom was performed using a dedicated MC-code as DOSXYZnrc with
PGT-irradiation model. The ratio of organ dose value calculated in MC-method to the volume
CT dose index(CTDIvol) reported by CT-scanner machine according to PGT radiation technique
has been introduced as conversion factor.
Results:
In PGT method, CTDIvol was 10.6mGy and Organ Dose/CTDIvol conversion factor for
esophagus, lung, heart, breast, ribs, muscle, spine and spinal cord were obtained as; 0.96, 1.46,
1.2, 3.28. 6.68. 1.35, 3.41 and 0.93 , respectively.
Conclusion:
The results showed while, underestimation of patient dose was found in dose calculation based
on CTDIvol, also dose to breast is higher than the other studies. Therefore, the method in this
study can be used to provide the actual patient organ dose in CT imaging based on CTDIvol in
order to calculation of real effective dose(ED) based on organ dose.
Keywords of your Abstract : Patient Organ Specific Dose, Coronary CT Angiograph, Voxellaized Volume Dose Index, CT Dose Index
Acceptance Letter : http://gsia.tums.ac.ir/images/UserFiles/25804/Forms/306/acceptance-poster.pdf
The presentation : Poster
The Cover of Abstract book : http://gsia.tums.ac.ir/images/UserFiles/25804/Forms/306/cover_1.pdf
Published abstract in the abstract book with the related code : http://gsia.tums.ac.ir/images/UserFiles/25804/Forms/306/poster-in-book_1.pdf
Where has your abstract been indexed? : ISI
If you choose other, please name :  
The Congress Reporting Form
How many volunteers were present at the Congress? : more than 500
Delegates from which countries presented in the congress? : all around the world, japan, china, canada, italy and france
Were the delegates of any other organizations present in the congress? : Yes
If yes, please write the names of the organizations in the box : medical device producers
What were the responses to your talking points? Were specific questions or concerns raised? : imperessive to other about measurement of patient specific ct dose index, bcz its a big debate about the exposure dose in ct in nowadays imaging that even it may cause to death and so iuts mortality rate is considerable, so we had so many discussion about our method.
If you met staff members, please list their full names & positions. : dr mollaei, dr parsaei, Dr parham, Dr nirumand rad and some other from china and koreaa and us
Please inform us if there are any follow up actions we need to talk with the members of the congress : i met with the iranian medical physicists in north of america which i put the image rerport in linkedin, they are very interested for cllaboration with iraniamedica physiscits in iran, we need to follow the way of their education subjects and the way which they are taking fir inyrnship and residency matter of our graduation in haspitals and medical centers during their studying, therefore the international chancellor can help in this matter for heling the relation with north americas, if serious im ready ton have meeting in this matter.
Your experiences about the travel processes(Providing ticket, accommodation,...) : bcz of going to us was so difficult, i was the only iranian could attend in this congress
Please give a briefing of your own observations and outcomes of the congress: : as for me was very useful that i may talk about in a presentatrion, e.g, having medical physicists and biomedical engineers from all around the world in one place for observing the latest improvement in medical imaging and new radiotherapy techniques was very important to me. radiomics an other new medical devices were so excitable for any scientists. talking to othere researcher from other countries provide a good opportunity for me to transfere our knowlege to eachother.in a challenging way as for an iranian medical physicists was a good time for getting information in these new era of thechnology.