ARRS 2022 Abstracts

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E1360. 3D MRI with CT-Like Bone Contrast (3D Bone): Pictorial Review of Clinical Applications
Authors
  1. Parveen Sulthana Mohamed Ali; Changi General Hospital
  2. Fang Yang Sim; Changi General Hospital
  3. Hwee Choo Lee; Changi General Hospital
  4. Le Roy Chong; Changi General Hospital
Background
Several 3D MRI pulse sequences have been evaluated for generating CT-like bone contrast images to improve the ability of MRI in imaging cortical and subchondral bone for clinical musculoskeletal applications. 3D-Bone is one such recently described MRI method, based on an in-phase proton density-weighted 3D stack-of-stars gradient-echo pulse sequence using short TE and very small flip angles.

Educational Goals / Teaching Points
This presentation reviews the technical aspects of the 3D-Bone method and presents a pictorial review of the utility of 3D-Bone in the clinical assessment of common musculoskeletal conditions, such as bony glenoid defects in shoulder dislocations, morphologic and quantitative angle measurements in femoroacetabular impingement and developmental dysplasia, and bony evaluation in osteoarthritis, spondyloarthritis, and septic arthritis. The advantages and limitations of 3D-Bone will also be discussed.

Key Anatomic/Physiologic Issues and Imaging Findings/Techniques
Advantages of the 3D-Bone method include inherent robust built-in motion compensation due to the overlapping central k-space trajectories, low software/hardware requirements, high-resolution isotropic images amenable to multiplanar reformations, and the ability to produce CT-like bone contrast images within clinically relevant scan times without the need for image post-processing.

Conclusion
The addition of 3D-Bone to routine musculoskeletal MRI imaging protocols can provide complete bone and soft tissue information from a single MRI study and spares radiation doses incurred from additional CT.