The Diagnostic Value Of MSCT Angiograpy In Renal Arterial Stenosis

Renovascular hypertension about adult hypertension about 5% -10%. the main cause of renal artery stenosis (RAS renal arterial stencxsis) was mostly seen in 30 years of age or over 50 years of age without family history of hypertension in China with the improvement of living standards, Aged in Atherosclerosis is the main cause, Renal artery stenosis or the incidence of 15%~35%. RAS can cause ischemic nephropathy, which led to renal failure, a serious threat to the health of patients. Therefore, early identification and RAS active treatment, not only to improve renal ischemia correct hypertension. More importantly, the protection of renal function.There are many means of inspection diagnosis of renal artery stenosis, color Doppler ultrasound in the right conditions, possible diagnosis of renal artery stenosis, but even normal renal arteries showed stenosis can not exclude the possibility. MRA can make a diagnosis, but if the blood flow to slow down or change the state may have a false negative or false positive. Although DSA can be diagnosed, it was traumatic inspection, which can only provide the lumen, not indicate wall and the adjacent vascular structures with the pathological changes of calcium plaque and thrombus MSCTA show is not as much as that can be used for diagnosis MSCTA variety of renal artery disease, include renal artery stenosis, aneurysm, atherosclerosis and vascular malformations. The largest is the renal artery stenosis diagnosis.CT angiography (CTA Computed Tomographic Angiography ) in 1989 appears to rely on computed tomography, and the gathering of human axial CT images, using computer technology to the body after treatment for vascular reconstruction, is a non-invasive diagnosis of human vascular disease in vivo imaging technique known as CTA. Double-and the emergence of multi-slice, image acquisition speed is getting faster and faster acquisition time is getting short, CT As computer technology and the rapid development of functional images increasingly rich, convenience, so that we can rapidly. convenient access to the satisfaction of the image, using multislice CT scanning after treatment, CT The human vascular images we call MSCTA (computed to multi-slice Tomography Angiography) imaging. MSCTA basic tenets elbow by intravenous injection of contrast agent. the use of multi-slice CT in unmonitored target intravascular contrast agent reached its peak when the original three-dimensional data acquisition, Then the computer post-processing functions, the ultimate target recombinant vascular three-dimensional images of vascular imaging for. After treatment methods include 3D, VR, SSD, MIP, etc., in the MSCTA lot of research, Many scholars CTA advantages in the diagnosis of the lesion showed 3D images can be any angle repeated observation. Right internal lesions, vascular lesion and its surrounding structures and the relationship between the parent vessel may observation. CTA, the sensitivity, specificity close to the DSA. So many articles that can be used as MSCTA various vascular disease screening method of choice. CT recent rapid development of computer technology, has been raised from the single-row CT machine to improve the two-row, four rows. 16 - or even 64 row CT scanning ever faster, increasingly thin thickness, the data collection increase. Post-processing software increasingly rich and accurate. Application for CTA created a more optimistic outlook, further expand the scope of application. their trends great alternative DSA trend. 16-row spiral CT for a new generation of CT representatives, scanning speed, slice thickness thinner, more data, After the treatment the pictures are clear and accurate. CTA to make the diagnosis will be more advantages. The clarity of multi-slice spiral CT screening for CTA and the advantages in the diagnosis of renal artery stenosis explore aspects value , the right renal artery stenosis in the selection of an appropriate screening tool.