Quantitative MRI Image Quality Assessment

Congress:

EuroSafe Imaging 2017

Poster Number:

ESI-0058

Type:

EuroSafe Imaging

Keywords:

Equipment, MR-Angiography, MR, MR physics, Action 3 - Image quality assessment based on clinical indications, Action 2 - Clinical diagnostic reference levels (DRLs), Action 4 - Quality of radiological equipment, Action 3 - Optimisation, diagnostic reference levels, image quality, Physics, Quality assurance

Authors:

K. Sergunova, S. Morozov, S. Kim, N. Potrakhov, A. Petraikin, E. Gaysina, D. Semenov

DOI:

10.1594/esi2017/ESI-0058

DOI-Link:

https://dx.doi.org/10.1594/esi2017/ESI-0058

Fig. 1: QA rotating disk phantom and silicone tubes with MR-contrast fluid

Fig. 3: The calibration curve for PC MRA

Fig. 4: Spatial resolution assessment

Fig. 5: 2D TOF and 3D TOF images of the rotating disk phantom and patients

Background/Introduction

Magnetic Resonance Imaging (MRI) is one the most popular methods of diagnosis. The main goal of it, as all diagnostic methods, is to produce high quality images to provide accessible, accurate, early-stage diagnostics. To obtain high resolution images from technologically sophisticated equipment a large number of electronic components and data processing are used, which affect the quality and thus the results of diagnosis. In order to ensure the proper functioning of these systems and the required image quality over the lifetime of the equipment regular...

Description of activity and work performed

Forquantitative MRI assessingimage quality we developed quality assurance (QA) phantoms to control the following parameters and characteristics: accuracy of the linear velocity and volumetric flow of liquids measured by phase-contrast MRA (PC MRA), the spatial resolution and signal to noise ratio for various pulse sequences used in MRA. The rotating disk phantom for MRA (Fig. 1) is filledby agarose gel and rotated by belt transmission. It provides a range of velocities from two speed ranges: +/- 20 cm/sec and +/-72 cm/sec (provided the change of...

Conclusion and Recommendations

The MRI compatible rotating disc phantom filled agarose gel and additional tubeswith MR-contrast fluidand piston flow were built.The dynamic phantom provides the whole range of physiological velocities and can be used for calibration of MRI unites, calculating correction factors for PC MRA and assessing the spatial resolution in 2D and 3D TOF. Developed software tool has confirmed its efficiency, convenience and simplicity in use and allows to minimize the duration of routine QA procedures. The range of parameters are controlled: linear velocity and flow for...

Personal/Organisational information

Dr. Petraikin Alexey Vl. MD, PhD Research and Practical Center of Medical Radiology (Health Department of Moscow Government) Srednyaya Kalitnikovskaya str., 28/1, Moscow, RF, 109029 [email protected] Sergunova Kristina Research and Practical Center of Medical Radiology (Health Department of Moscow Government) Srednyaya Kalitnikovskaya str., 28/1, Moscow, RF, 109029 [email protected]

References

1. Acceptance Testing and Quality Assurance Procedures for Magnetic Resonance Imaging Facilities,Report of MR Subcommittee Task Group I,American Association of Physicists in Medicine, 2010 2.Gromov A.I., Sergunova K.A., Petraikin A.V., Polenok J.A., Mikhaylenko A. Rotating disk phantom for controlling the velocity measurements by phase-contrast magnetic resonance imaging and the method for monitoring and measuring the linear velocity and flow rate of the phantom [in Russia]. Patent RU 2579824, published of March 11, 2016. 3. Kuusela L. J. Do we need MRI quality assurance: experience from...