The dimension of a voxel used in acquisition to obtain matrix is also known as which of the following?

• A. Contrast resolution
• B. Spatial resolution
• C. Temporal resolution
• D. Signal strength

Answer: (B)

The dimension of a voxel is fundamentally associated with spatial resolution, which refers to the ability of an imaging system to distinguish between small objects that are close together. In MRI, the size of the voxel directly impacts the spatial resolution. A smaller voxel can capture finer details of the anatomical structures being imaged, allowing for more precise representations of the tissues.

Spatial resolution is determined by several factors, including the matrix size and field of view; as the size of the voxel decreases, more voxels can fit into the same imaging volume, enhancing the detail that can be visualized. In this context, spatial resolution is crucial for accurately depicting small lesions, structures, or abnormalities within the scanned area.

Contrast resolution, temporal resolution, and signal strength are related concepts but do not directly describe the dimensions of a voxel. Contrast resolution pertains to the ability to differentiate between tissues of different signal intensities, temporal resolution relates to how quickly images can be acquired (important in dynamic studies), and signal strength is associated with the amount of signal captured by the MRI scanner, which influences image clarity but is not specifically defined by voxel dimensions.