8.Passing though human body ,it can carry important characteristic information of inner structure, due to different features among bone, tissue and muscle.

12.Without artificial help,DR can direct transform the X-ray passing through patients into digital images, save and display them in the computer.

17.DSA ,based on flat panel detector, not only has the advantage of good image resolution, but also decreases the radiation dose received by patients and physicians.

16.There are three basical methods of DSA, which are respectively temporary subtraction ,energy subtraction and hybrid subtraction.

37.The powerful magnetic flied of the MR system will attract iron-containing (also known as ferromagnetic) objects.

15.Preventive maintenance is a necessary to ensure the safety and performance of the system.

18.Automatic control of X-ray tube current is realized by adjusting primary voltage of X-ray tube filament transformer to obtain stable and high quality image.

5.By doing so ,it could ensure that the exam was carried out on right patient and correct inspection part.

1. Ultrasound and magnetic resonance imaging was added to the list of skills used by radiographers because they are also medical imaging, but these disciplines do not use ionizing radiation or X-rays.

40.A contrast agent calld gadolinium may be injected into a vein to help obtain clearer picture of the area being examined.