Gamma Camera - Artifacts

David Gilmore, MS, CNMT, NCT, RT(R)(N)

Matthew R. Palmer, PhD Images courtesy of Dan Devries and Fredric Fahey (TCH)

Beth Israel Deaconess Medical Center

Department of Radiology

Boston, MA USA

Linearity

With Linearity Correction Linearity Correction Off

Uniformity Corrections & Off-Peak Images

Tc-99m (140 keV) – Intrinsic Floods, no Uniformity Correction

Window (-10%,+10%) Windows (0, +10%) Windows (0, -10%)

Collimator Defect

Early Late

Extrinsic Flood, foil collimator

Tube Defect

Cracked Crystal

Patient Motion

67Ga

Overlying Objects

Lung Pacemaker

Off-Peak Images -1

Off Peak Images -2

Distance Effects