[Carotid artery wall perfusion of the plaque: three dimensional contrast sonographic imaging].

We usually check stenosis rate in patients through the limited directions of angiography. This can result in insufficient evaluation. The importance of the condition of the carotid artery wall in fully accpted nowadays, and ultrasound sonography is being used as a means to study it.

[A case of calvarial aneurysmal bone cyst: transcranial contrast sonographic examination with pulse inversion harmonic imaging method].

A 31-year-old female came to our hospital complaining of left frontal bulging with pain on 10 August 2000. The head x-p showed a radiolucent lesion and bulging at the same calvarial site. CT scan and MRI showed fluid-fluid levels, diploic cyst, deformity and hypertrophic calvarial change.

[Unilateral absence of the external carotid artery: three case reports].

We encountered three cases of unilateral absence of the external carotid artery. We were able to find only Franklin's case reported in the literature published to date. The absence of the external carotid artery has been explained as due to the fact that the development of the external carotid artery arising from the ventral aorta was disturbed by unknown factors in the early embryonic stage.