X-ray in an object in Computed Tomography? Beam hardening effect Cupping effect Partial volume effect Photon effect Q40.How much is the discriminable range of spatial resolution in the test of CT standard phantom? above 0.6 mm below 0.8 mm below 1.0 mm below 1.2 mm Q41.What is the recommended limit of magnetic field strength for cardiac pacemaker inserted person in MRI examination room? 1) 0.5 gauss 2) 5 3) 10 gauss 4) 50 gauss Q42.Which of the following is different with their character from international standard system in MRI quality management? AAPM standards ACR NEMA standards MDD evaluation Report Q43.MR examination is generally accompanied by a very large noise. Choose the type of coil that leads to noise reduction when plan placed in a vacuum. Body coil Phased array coil Gradient coil Magnetostatic coil Q44.Which of following is not measurement item of MRI phantom image? linearity contrast resolution accuracy of slice thickness
X-ray in an object in Computed Tomography? Beam hardening effect Cupping effect Partial volume effect Photon effect Q40.How much is the discriminable range of spatial resolution in the test of CT standard phantom? above 0.6 mm below 0.8 mm below 1.0 mm below 1.2 mm Q41.What is the recommended limit of magnetic field strength for cardiac pacemaker inserted person in MRI examination room? 1) 0.5 gauss 2) 5 3) 10 gauss 4) 50 gauss Q42.Which of the following is different with their character from international standard system in MRI quality management? AAPM standards ACR NEMA standards MDD evaluation Report Q43.MR examination is generally accompanied by a very large noise. Choose the type of coil that leads to noise reduction when plan placed in a vacuum. Body coil Phased array coil Gradient coil Magnetostatic coil Q44.Which of following is not measurement item of MRI phantom image? linearity contrast resolution accuracy of slice thickness
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