Background/introduction
Medical imaging using ionising radiation always causes concerns about the radiation exposure and possible harm to the patient. Therefore EUROSAFE imaging is trying to provide a system where radiation protection is in the focus of medical imaging approaches. This includes trying to provide tools to reduce dose for medical imaging methods like CT and to understand the effect of such optimisation in terms of diagnostic accuracy. In practice, it is difficult to determine the diagnostic accuracy related with an optimisation procedure in terms of patient...
Description of activity and work performed
The working group consists of experts contributing to image quality assessment in radiological imaging tasks. The various experts has gathered all relevant information regarding the different methods for image quality evaluation as a first step in computed tomography applications. These methods include
- a) Fourier based methods in images of physical phantoms (see e.g. (1))
- b) task based measures in images of physical phantoms (see e.g. (2))
- c) the evaluation of such measurements for detection tasks (see e.g. (3))
- d) evaluation of...
Conclusion and recommendations
The work of the group has shown that there are various approaches suitable for image quality measurements and evaluations in computed tomography imaging. However, there is not just one procedure which will always allow a suitable determination of the information needed. Different approaches are better suited for testing physical imaging parameters of a CT device and e.g. for different software based optimisation schemes. These will also be patient-dependent.
Thus, it is not realistic, that one single value, will be suitable for all tasks or even...
Personal/organisational information
C. Hoeschen; Magdeburg/DE - nothing to disclose E. Wg Image Quality; Vienna/AT - nothing to disclose
References
(1) Friedman SN, Fung GS, Siewerdsen JH, Tsui BM. A simple approach to measure computed tomography (CT) modulation transfer function (MTF) and noise-power spectrum (NPS) using the American College of Radiology (ACR) accreditation phantom. Med Phys. 2013;40(5):051907. doi:10.1118/1.4800795
(2) Barrett HH, Myers KJ, Hoeschen C, Kupinski MA, Little MP. Task-based measures of image quality and their relation to radiation dose and patient risk. Phys Med Biol. 2015;60(2):R1–R75. doi:10.1088/0031-9155/60/2/R1
(3) Racine D, Ryckx N, Ba A, et al. Task-based quantification of image quality using a model...