What was the CT image matrix size in 1975?

What was the CT image matrix size in 1975?

• A. 512x512
• B. 64x64
• C. 128x128
• D. 256x256

Answer: (C)

In the mid-1970s, the amount of data that could be reconstructed for each CT slice was limited by the available computer power and memory. A 128-by-128 image grid provided enough detail to distinguish key anatomical structures while staying within the capabilities of the era’s hardware. Larger matrices would have demanded far more memory and slower processing, which wasn’t practical at the time, and smaller matrices would have resulted in coarse, less useful images. As a result, 128x128 was the common reconstruction size around 1975, balancing image quality with computational feasibility. In later years, as computing power grew, higher-resolution matrices like 256x256 and beyond became feasible.

In the mid-1970s, the amount of data that could be reconstructed for each CT slice was limited by the available computer power and memory. A 128-by-128 image grid provided enough detail to distinguish key anatomical structures while staying within the capabilities of the era’s hardware. Larger matrices would have demanded far more memory and slower processing, which wasn’t practical at the time, and smaller matrices would have resulted in coarse, less useful images. As a result, 128x128 was the common reconstruction size around 1975, balancing image quality with computational feasibility. In later years, as computing power grew, higher-resolution matrices like 256x256 and beyond became feasible.