Copyright © 2003 American Medical Association. All rights reserved. From: Patterns of Perfusion-Weighted Imaging in Patients With Carotid Artery Occlusive Disease Arch Neurol. 2003;60(2):237-242. doi:10.1001/archneur.60.2.237 Figure Legend: Imaging studies of a 61-year-old man who had expressive aphasia and mild right-sided hemiparesis. Diffusion-weighted imaging (DWI) showed a left frontal stroke. Perfusion-weighted imaging showed prolonged relative mean transit time (rMTT), decreased relative cerebral blood volume (rCBV), and relative cerebral blood flow (rCBF) involving the entire left middle cerebral artery territory. Magnetic resonance angiography (MRA) of the head showed no flow in the left internal carotid artery and decreased flow in the left middle cerebral artery. A complete occlusion of the left internal carotid artery was detected by ultrasonography. Date of download: 10/1/2017 Copyright © 2003 American Medical Association. All rights reserved.

Copyright © 2003 American Medical Association. All rights reserved. From: Patterns of Perfusion-Weighted Imaging in Patients With Carotid Artery Occlusive Disease Arch Neurol. 2003;60(2):237-242. doi:10.1001/archneur.60.2.237 Figure Legend: Imaging studies of a 64-year-old man who had left-hand numbness, decreased nasolabial fold on the left side, and gait difficulties. Diffusion-weighted imaging (DWI) showed a right insular stroke. Perfusion-weighted imaging showed prolonged relative mean transit time (rMTT), decreased relative cerebral blood volume (rCBV), and relative cerebral blood flow (rCBF) involving the entire right internal carotid artery territory. Magnetic resonance angiography (MRA) of the head showed severe decreased flow in the right siphon and internal carotid artery. Carotid ultrasound showed a 90% stenosis in the right internal carotid artery. Date of download: 10/1/2017 Copyright © 2003 American Medical Association. All rights reserved.

Copyright © 2003 American Medical Association. All rights reserved. From: Patterns of Perfusion-Weighted Imaging in Patients With Carotid Artery Occlusive Disease Arch Neurol. 2003;60(2):237-242. doi:10.1001/archneur.60.2.237 Figure Legend: Imaging studies of a 67-year-old man who had left hemiparesis and left-sided neglect. Diffusion-weighted imaging (DWI) showed right anterior cerebral artery–middle cerebral artery (not seen) and middle cerebral artery–posterior cerebral artery border zone strokes. Perfusion-weighted imaging showed prolonged relative mean transit time (rMTT), decreased relative cerebral blood volume (rCBV), and relative cerebral blood flow (rCBF) involving the ipsilateral border zone territories. Magnetic resonance angiography (MRA) of the head showed no flow in the intracranial portion of the right internal carotid artery and cross-filling of the right middle cerebral artery from the contralateral side. Carotid ultrasonography showed occlusion of the right internal carotid artery and 80% to 90% stenosis of the left internal carotid artery. Date of download: 10/1/2017 Copyright © 2003 American Medical Association. All rights reserved.

Copyright © 2003 American Medical Association. All rights reserved. From: Patterns of Perfusion-Weighted Imaging in Patients With Carotid Artery Occlusive Disease Arch Neurol. 2003;60(2):237-242. doi:10.1001/archneur.60.2.237 Figure Legend: Imaging studies of a 64-year-old woman who had stereotypical spells of right-sided weakness and numbness. Diffusion-weighted imaging (DWI) and perfusion-weighted imaging were normal. Magnetic resonance angiography (MRA) of the head showed no flow through the left internal carotid artery. The MRA and ultrasonogram of the neck confirmed the presence of a left internal carotid artery occlusion. rCBV indicates relative cerebral blood volume; rCBF, relative cerebral blood flow; and rMTT, relative mean transit time. Date of download: 10/1/2017 Copyright © 2003 American Medical Association. All rights reserved.

Copyright © 2003 American Medical Association. All rights reserved. From: Patterns of Perfusion-Weighted Imaging in Patients With Carotid Artery Occlusive Disease Arch Neurol. 2003;60(2):237-242. doi:10.1001/archneur.60.2.237 Figure Legend: Imaging studies of a 71-year-old asymptomatic man with 80% to 90% right internal carotid artery stenosis by magnetic resonance angiography (MRA) (right panel top and bottom) and carotid ultrasonography. Diffusion-weighted imaging (DWI) and perfusion-weighted imaging were normal. rMTT indicates relative mean transit time; rCBV, relative cerebral blood volume; and rCBF, relative cerebral blood flow. Date of download: 10/1/2017 Copyright © 2003 American Medical Association. All rights reserved.