FIELD: physics.
SUBSTANCE: system (10) for correcting anatomical images includes: a magnetic resonance (MR) imager (12) which obtains MR image data (14) of a subject (60) during scanning to collect MR data; a nuclear scanner (20) which obtains nuclear image data (23) of a subject (60) during scanning to collect nuclear data, and simultaneously measures transmission data (22) from a radiation source (18) located in the investigation region of the nuclear scanner (20); and a processor which: generates an attenuation correction (AC) map (16) from the MR image data (14); iteratively adjusts the AC map (16) to form an improved AC map (32) using the measured transmission data (22); and makes corrections to image nuclear data (23) based on attenuation using the improved AC map (32).
EFFECT: ensuring accuracy of the attenuation correction map, eliminating the uncertainty between air elements of the three-dimensional image and bone elements of the three-dimensional image in a magnetic resonance-based attenuation correction map.
15 cl, 5 dwg
