Mengenal Thin slice brain scan with retrospective reconstruction and multiplanar reformats (MPR)

Retrospective reconstruction of the data set allows for adding thin slices into thicker and thereby reducing image noise. An overlapping reconstruction increment of a narrow collimated scan also allows for multiplanar reformatting with good spatial resolution. The thin slices of the MPR stacks are added into thicker slices to reduce noise.

A 40 second scan (4 X 1.0 mm) with a reconstruction increment of 0.5 mm yields ~300 images. These are loaded into the MPR software. All images are reformatted at a thickness of 5.0 mm.

Patient history: 50 year old man with spontaneous intra- cranial hemorrhage 4 months prior to this scan with residual visual field deficit.

CT findings:Low attenuating area in right occipital lobe (arrows).

CT diagnosis: Sequelae from prior bleeding.

Radiologynet Tags: Retrospective reconstruction of ct scan head