ABSTRACT
Hepatocellular carcinoma (HCC) is a highly prevalent tumor in China. It has an insidious onset, rapid progression, early recurrence and poor prognosis. Most patients are already in the middle and late stages when they are diagnosed and lose the best time for surgery. Therefore, early diagnosis and treatment of HCC is crucial for patients. In recent years, contrast-enhanced ultrasound (CEUS) technology has been widely used in the diagnosis of liver diseases, especially in the diagnosis and treatment of HCC, which has an irreplaceable role. Meanwhile, the image fusion technology developed on the basis of CEUS can highlight the value of CEUS in the diagnosis and treatment of HCC.
ABSTRACT
Posterior circulation ischemia (PCI) is a common disease and frequent encountered disease in clinical practice. It refers to the transient ischemic attack and the cerebral infarction in vertebral-basilar artery system. Vertebral aretery atherosclerosis is one of the common causes of PCI. Imaging examinations for PCI include transcranial Doppler (TCD), digital subtraction angiography (DSA), computerized tomographic angiography (CTA), magnetic resonance angiography (MRA), color Doppler ultrasound (CDU) and so on. TCD can serve as initial screening tool in diagnosis of PCI. DSA is still thegold standardin diagnosis of vertebral-basilar abnormalities, although the operation injury and photography drugs poisonousness have not been resolved. CTA has almost the same defects as DSA, while MRA is noninvasive. Some researches have reposed that MRA can exaggerate the vertebral artery depression level. The inner diameter and hemodynamics of the vertebral artery can be accurately measured by CDU, and it can be seen as a noninvasive examination for PCI,which is direct, accurate, convenient and repeatable. It can provide positive evidence for diagnosis and treatment of PCI. This article reviews the progess of CDU in diagnosis of vertebral aretery atherosclerosis.
ABSTRACT
Objective To conduct comparative study of healthy vertebral artery (VA) blood flow of subjects from plain and plateau region using color Doppler ultrasound (CDUS) measurement,and to investigate the influence of plateau on blood flow of VA.Methods One hundred and thirty-five subjects from plain region and eighty from high altitude region were recruited.Time averaged maximum velocity and inradium (D) of VA were measured with CDUS technology.Unilateral VA blood flow and total blood flow were calculated.Peripheral blood viscosity measurement was carried out by testing low cut,mid cut,high cut,plasma viscosity and red blood cell count (RBC),hemoglobin concentration (HGB),hematocrit (HCT).Results VA diameter,blood viscosity,RBC,HGB,and HCT of plateau group are all higher than that of the plain group (P＜0.05),while the total blood flow was lower than that of plain group and the value of male was higher than that of female (P＜0.05).The inradiums of right side VA were larger than that of the left side (P＜0.05) in plain group,while no difference was observed in plateau group (P＞0.05).Conclusions Long term (＞10 years) living in plateau hypoxia (altitude＞3 000 m) environment can reduce the average flow velocity and the blood flow of VA.
ABSTRACT
Objective To conduct comparative study of vertebral artery blood flow of arteriosclerosis patients and healthy people using color Doppler ultrasound (CDUS),and to discuss the effect of arteriosclerosis on vertebral arterial blood flow.Methods Two hundred and eighty-five cases of vertebral artery test were collected and divided in to normal group of one hundred and thirty-five cases and vertebral artery sclerosis group of one hundred and fifty cases according to the presence of vertebral artery sclerosis.Time averaged maximum velocity (TAMV) and vertebral artery diameter(D) of vertebral artery were measured using CDUS technique.Unilateral vertebral artery blood flow and total blood flow were calculated.Results The vertebral artery TAMV and total blood flow of arteriosclerosis group was both lower than that of normal group (P＜0.05).Left side vertebral artery diameters of the two groups were higher than that of the right side.Conclusions Arteriosclerosis can reduce vertebral artery TAMV and blood flow.The inner diameter of the left side vertebral artery dominates the artery blood flow.
ABSTRACT
Objective To investigate the correlation of ankle-brachial index( ABI)., color doppler ultrasound spectrum and toe-brachial index (TBI) of lower extremity artery in diabetic patients. Methods ABI, TBI and color doppler ultrasound spectrum measurement were carried out on 109 lower extremity artery of 55 diabetic patients. Croups were assigned according to ABI and TBI values and the correlation of ABI and color doppler ultrasound spectrum as well as ABI and TBI. Results The changes of ABI and of color doppler ultrasound spectrum in Group A1(0.9