Fig. 6

Images of the excluded case in assessment of diagnostic accuracy of stenosis.A patient with occlusive bilateral V4 segments of the vertebral artery (VA), the proximal and mid based artery (BA). A The posterior circulation was not show in Maximum intensity projection (MIP) of MRA and included vessels (bilateral posterior cerebral artery, bilateral V4 of the VA and BA) were evaluated as occlusion. B–E Thin-MIP of CTA reconstructed by four methods (HIR, DLR, DLRtMIP, DLRtAve) from CTP image sets showed distal BA and bilateral posterior cerebral artery clearly, and the arteries above were regarded as non or mild stenosis