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1、医学影像技术考试知识点（Medical imaging technology examination knowledge point）Medical imaging technician examinationFirst time share:. Wait until the flowers have not been opened, have been shared 4 Comments (0) copy, link, share, reprint, deleteWe apply the primary imaging technology professional technician t
2、ime is December 15th to January, the examination time is May of the following year, examination written examination and man-machine dialogue. I did several sets of questions at home and found that there was more diagnostic and medical anatomy. I summed up some of the key points, which are frequently
3、 seen, and some of them are incorrect. These are only partial, and I will continue to update. Try for one year!Iodine allergy test: sublingual test, intradermal test, intravenous injection test, conjunctival test, oral testCT advantages: 1, density resolution is high; 2, can do quantitative analysis
4、; 3, straight section of the image; 4, no level of interference outside the structureThe use of contrast agents: Choledochography - biligrafin; digestive tract - Medical barium sulfate; angiocardiography Hypaque, double Conray, metrizamide ventriculography; air; urography - angiografin; pyelography
5、- sodium amidotrizoate; cerebral angiography Hypaque; myeloggraphy - Iotrolan, iophendylate; salpingography - lipiodolRegular CT and spiral CT:The same point: the X-ray tube rotates continuouslyDifference: spiral CT collects data. The annoying scanning method is that the X-ray tube is changed from r
6、eciprocating motion to continuous rotation scanning in one direction. The subject (examination bed) moves in one direction at the same time.The advantages of spiral CT: first, improve the scanning speed, reduce motion artifacts; two, because it can carry out thin layer scanning, it can provide a bet
7、ter three-dimensional image reconstruction volume dataCT image quality parameters: first, contrast and contrast, resolution (density resolution) two, high contrast resolution and low contrast resolution; three, spatial resolution; four, noise; five, uniformityThe projection fibers are the internal c
8、apsule and the outer capsuleThe ventricles of the brain include the left lateral ventricles, the three or four ventricle, and the midbrain aqueductThe common bleeding site of hypertension is basal ganglia hematomaThe clinical characteristics of X ray are penetration, fluorescence, sensitization and
9、ionizationWhat are the advantages and disadvantages of fluoroscopy and radiography?1, the perspective of advantages: 1, can be arbitrarily rotated with multi angle perspective; motor function 2, can observe the motion organs; 3, simple operation and low cost; 4, to obtain test results; 5, interventi
10、onal operation in the perspective of care.The disadvantages of fluoroscopy: 1. Subtle lesions and thick parts are not clear; 2, permanent records cannot be left; 3, patients receive large doses of radiation.2 advantages: 1, radiography, clear image contrast; 2, observe subtle lesions and a thick par
11、t of a clear; 3, smaller radiation dose received by the patient; 4, there is a permanent record for review, comparison;The disadvantages of radiography: 1. It is not convenient to observe the movement function of organ; 2, the technique is complex and the cost is higher; 3, the result is longer.Comm
12、only used special photography are: tomography and soft X-ray photographyHow to do the protection of X-ray examination?Staff protection: 1, make full use of various protective equipment; 2, control of primary radiation; 3, reduce scattered rays; 4, regular health examination;Protection of subjects: 1
13、. The distance from skin to focus shall be no less than 35cm; non projective fields should be covered with lead rubber, especially the gonads and fetuses; and 2, the field of contracted radiation shall be reduced.Selective angiography: a percutaneous arterial or venous catheter inserted into the tar
14、get vessel under surveillance by a television screen. Contrast agents were injected into the angiography.MRI: spin by RF electromagnetic wave in an B0 static magnetic field is not zero for proton nuclear excited, nuclear magnetic resonance, obtain tissue relaxation information and proton density inf
15、ormation by using the induction coil inspection technology, spatial positioning with gradient magnetic field, the image postprocessing method and magnetic resonance imaging simulation technology.The advantages and disadvantages of MRI are briefly described:Compared to MRI and CT, the advantage is th
16、at.:1, in addition to showing anatomical changes,It can provide the information of pathology and biochemistry; 2. The resolution of soft tissue is higher than that of CT, and the image is rich in layers. 3, can achieve arbitrary orientation image, multi parameter imaging, positioning and qualitative accuracy than CT; 4, no bone artifacts, and can directly display the heart
