persentasi radiologi awal

8/12/2019 persentasi radiologi awal

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Gambar 25.35: Chronic occlusion. Long-standing internal carotid artery occlusion results in low-resistance waveform in

the external carotid artery.

Gambar 25.35: Chronic occlusion. hasil oklusi arteri karotis internal .resistansi gelombang rendah di

arteri karotid eksternal


2/11

FIGURE 25-36. Common carotid artery (CCA) occlusion causes abnormal internal carotid artery (ICA) waveform.

A, Antegrade tardus-parvus waveform is seen in an ICA distal to a CCA occlusion.

B, Retrograde external carotid artery(ECA) flow with a tardus-parvus waveform caused by collateral flow from the contralateral ECA to supply the

ipsilateral ICA distal to

a CCA occlusion.

C, Color Doppler image shows antegrade ECA flow (E) with an ECA branch (arrow) and retrograde ICA flow (I);

J, internal jugular vein.

D, Spectral Doppler image shows high-resistance retrograde right ICA flow. E,

High-resistance antegrade flow in

the right ECA distal to a CCA occlusion.


3/11

FIGURE 25-37. Postcarotid endarterectomy

(CEA) appearances. A, Normal post-CEA

changes with a vein patch

(arrows). B, Abnormal wedge of

residual/recurrent plaque/thrombus in newly

symptomatic post-CEA patient. C, Post-CEA

sutures (arrow)

with a residual intimal flap in lumen


4/11

FIGURE 25-38. Carotid stent. A, Normal right carotid stent (arrow) shows complete filling on

color Doppler examination.

B, Transverse image of carotid stent (arrow) in the carotid bulb shows residual plaque

(arrowhead) in the lumen. C and D, Left carotid

stent shows visible narrowing on color Doppler (C) and elevated velocities (D) consistent with a

greater than 70% stenosis using standard


5/11

FIGURE 25-39. Fibromuscular dysplasia. A,

Longitudinal color Doppler image of the

middle to distal portion of the internal

carotid artery (ICA) shows velocity elevationand significant stenosis. B, Same patients

proximal portion of the ICA shows no stenosis.

C, Angiogram demonstrates typical appearance

of fibromuscular dysplasia in the mid-ICA and

distal ICA. Note the beaded appearance

resulting from focal bands (arrow) of thickenedtissue that narrow the lumen.


6/11

FIGURE 25-40. Long-segment stenosis of

common carotid artery (CCA) caused by

Takayasusarteritis.

A, Power Doppler image of left CCA shows long-

segment concentric narrowing caused bygreatly thickened walls of the artery. B, Power

Doppler image of right CCA in same patient

demonstrates similar concentric narrowing

(arrows). C, Right spectral Doppler waveform

shows a mildly tardus-parvus waveform.


7/11

FIGURE 25-41. Carotid artery dissection. A, Abnormal high-resistance waveforms (arrow) at

the origin of the right internal

carotid artery (ICA) with no evidence of flow distal to this point (curved arrow). B, Gray-scaleevaluation of the vessel in the area of


8/11

FIGURE 25-42. Carotid body tumor. A, Transverse image of the carotid bifurcation shows a

mass (arrows) splaying the internal

carotid artery (ICA) and external carotid artery (ECA). B, Pulsed Doppler traces of the carotid

body tumor show typical arteriovenous

shunt (low-resistance) waveform.


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FIGURE 25-43. Ectatic common carotid artery (CCA). Color Doppler image shows ectatic

proximal CCA arising

from the innominate artery (I) and responsible for a pulsatile right

supraclavicular mass


10/11

FIGURE 25-44. Power D Pathologic lymph node near carotid

bifurcation. oppler image shows a malignant lymph

node (arrow) lateral to the carotid bifurcation.


11/11

FIGURE 25-45. Pseudoaneurysm of the common

carotid artery (CCA). Transverse image of the left distal

CCA (C) demonstrates a characteristic to-and-fro waveform in the

neck of the large pseudoaneurysm (P), which resulted from an

the pulsatility and resistive indices of the blood vessels. attempted central venous line

placement.

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