Work

Quantitative anatomy mimicking slice phantoms

Year: 2021

Type: article

Abstract: Purpose To present a reproducible methodology for building an anatomy mimicking phantom with targeted T1 and T2 contrast for use in quantitative magnetic resonance imaging. Methods We propose a reproducible method for creating high‐resolution, quantitative slice phantoms. The phantoms are created using gels with different concentrations of NiCl2 and MnCl2 to achieve targeted T1 and T2 values. We describe a calibration method for accurately targeting anatomically realistic relaxation pairs. In addition, we developed a method of fabricating slice phantoms by extruding 3D printed walls on acrylic sheets. These procedures are combined to create a physical analog of the Brainweb digital phantom. Results With our method, we are able to target specific T1/T2 values with less than 10% error. Additionally, our slice phantoms look realistic since their geometries are derived from anatomical data. Conclusion Standardized and accurate tools for validating new techniques across sequences, platforms, and different imaging sites are important. Anatomy mimicking, multi‐contrast phantoms designed with our procedures could be used for evaluating, testing, and verifying model‐based methods.

Source: Magnetic Resonance in Medicine

DOI: 10.1002/mrm.28740

Authors: Karthik Gopalan, Jonathan I. Tamir, Ana C. Arias, Michael Lustig

Institutions: University of California, Berkeley, The University of Texas at Austin

Language: English

Topic: Advanced MRI Techniques and Applications

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

Open Access status: green

Funders: Foundation for the National Institutes of Health, National Institute of Biomedical Imaging and Bioengineering

Awards: G1930815627, G2249008937, G2633003696, G469014669, MRI CORTICOGRAPHY: DEVELOPING NEXT GENERATION MICROSCALE HUMAN CORTEX MRI SCANNER