Organ dose variability and trends in tomosynthesis and radiography

Jocelyn Hoye; Yakun Zhang; Greeshma Agasthya; Greg M. Sturgeon; Anuj J. Kapadia; Wiliam P. Segars; Ehsan Samei

doi:10.1117/1.JMI.4.3.031207

1 August 2017 Organ dose variability and trends in tomosynthesis and radiography

Jocelyn Hoye, Yakun Zhang, Greeshma Agasthya, Greg M. Sturgeon, Anuj J. Kapadia, Wiliam P. Segars, Ehsan Samei

Author Affiliations +

Journal of Medical Imaging, Vol. 4, Issue 3, 031207 (August 2017). https://doi.org/10.1117/1.JMI.4.3.031207

Abstract

The purpose of this study was to investigate relationships between patient attributes and organ dose for a population of computational phantoms for 20 tomosynthesis and radiography protocols. Organ dose was estimated from 54 adult computational phantoms (age: 18 to 78 years, weight 52 to 117 kg) using a validated Monte-Carlo simulation (PENELOPE) of a system capable of performing tomosynthesis and radiography. The geometry and field of view for each exam were modeled to match clinical protocols. For each protocol, the energy deposited in each organ was estimated by the simulations, converted to dose units, and then normalized by exposure in air. Dose to radiosensitive organs was studied as a function of average patient thickness in the region of interest and as a function of body mass index. For tomosynthesis, organ doses were also studied as a function of x-ray tube position. This work developed comprehensive information for organ dose dependencies across a range of tomosynthesis and radiography protocols. The results showed a protocol-dependent exponential decrease with an increasing patient size. There was a variability in organ dose across the patient population, which should be incorporated in the metrology of organ dose. The results can be used to prospectively and retrospectively estimate organ dose for tomosynthesis and radiography.

Citation Download Citation

Jocelyn Hoye, Yakun Zhang, Greeshma Agasthya, Greg M. Sturgeon, Anuj J. Kapadia, Wiliam P. Segars, and Ehsan Samei "Organ dose variability and trends in tomosynthesis and radiography," Journal of Medical Imaging 4(3), 031207 (1 August 2017). https://doi.org/10.1117/1.JMI.4.3.031207

Received: 25 April 2017; Accepted: 30 June 2017; Published: 1 August 2017

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available