Department of Radiology, Brigham and Women's Hospital Harvard Medical School

Physical Characteristics of Nuclear Medicine Images

Stephen C Moore, PhD

I. Image Quality (or Clarity)

II. Unsharpness, Resolution

A. resolving power

B. point-spread function

C. line-spread function

D. edge-response function

E. modulation transfer function

F. factors degrading spatial resolution

III. Contrast

A. subject contrast

B. displayed contrast

C. dynamic range (latitude)

D. factors degrading contrast

IV. Noise

V. Artifacts (Attenuation)

VI. Conclusions

Each section describes the principal physical factors which influence these image descriptors. The effects considered are limited to nuclear medicine imaging.

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