Armrit stuvia Study guides, Class notes & Summaries

Nuclear magnetic resonance. - Answer Magnetic Resonance Imaging is derived from the process known as: Magnetic field, proton, radio-wave - Answer On a very basic level, the three basic components required to attain MR signals are: Superior soft-tissue contrast resolution. - Answer In comparison to Computed Axial Tomography, an advantage of MRI is: Special and costly site planning and shielding. - Answer In comparison to Computed Axial Tomography, a disadvantage of MRI is: Iron, cobal...

Atoms - answer-fundamental submicroscopic unit of all mass. Size of the atom and its weight have interested scientists for a long period. Subsequently, experiments were devised to determine the size and weight of the various atoms. The lightest of all atoms is hydrogen. Proton - answer-a subatomic particle having a positvie charge identical in magnitude to the negative charge of an electron and, together with the neutron, a component of all atomic nuclei. The proton forms, by itslef, the nucl...

Different tissues that have signals that appear similar on an MR image are described as: A) hypointense B) hyperintense C) isointense D) isodense - ANSWER-isointense in a large main magnetic field such as those employed in MRI, the motion of a hydrogen proton has been described as wobbling like a spinning top. this motion is called A) precession B) resonance C) frequency D) angular momentum - ANSWER-precession magnetic resonance imaging is derived from the process known as: A) ma...

Studies have demonstrated that persons with suspected intraocular metallic bodies must be screened prior to entering the static magnetic field. This can be adequately accomplished by obtaining: - Answer plain film x-rays of the orbits Orbital screening for suspected intraocular metallic bodies should be done prior to admitting patients and personnel into an MR system: - Answer at or above 0.01 Tesla strength Patients with tattooed eyeliner and / or eye makeup containing ferrous pigment sho...

ARMRIT Practice Test (MRI Technologist Quick Reference and Study Guide ARMRIT) with Complete SolutionsARMRIT Practice Test (MRI Technologist Quick Reference and Study Guide ARMRIT) with Complete SolutionsARMRIT Practice Test (MRI Technologist Quick Reference and Study Guide ARMRIT) with Complete Solutions Magnetism can be defined as the ability of certain substances to attract: - ANSWER-Iron, Cobalt, Nickel The components of the Gyro-magnetic ratio are: - ANSWER-Magnetic moment to angula...

The 2 types of enhancement media described by Lauffer, the mechanism of T1 agents is - ANSWER-to decrease T1 relaxation time, thus emitting high signal An analogy for the decoding of the MR signal through Fourier Transform - ANSWER-Basilar membrane processing sound Logically each line of phase encoding data is combined to allow the FT to determine the position along the y-axis. The number of phase encoding steps determines - ANSWER-the number of pixels along the y-axis In a gradient ech...

ARMRIT PHYSICS PRACTICE TEST WITH COMPLETE SOLUTIONS ARMRIT PHYSICS PRACTICE TEST WITH COMPLETE SOLUTIONS ARMRIT PHYSICS PRACTICE TEST WITH COMPLETE SOLUTIONS The tissue characteristic that depends heavily on the relative content of fat molecules and free water is: - ANSWER-Hydrogen concentration. T1 is the measurement of time for the longitudinal component of the net magnetization vector to recover what percentage of its original value after the application of a 90 degree radio...

ARMRIT-Practice Test (Part 2: Mri Clinical Applications) with Complete SolutionsARMRIT-Practice Test (Part 2: Mri Clinical Applications) with Complete SolutionsARMRIT-Practice Test (Part 2: Mri Clinical Applications) with Complete Solutions Tissues that have low (short) relaxation times have: - ANSWER-High (long) relaxation rates Spatial resolution is an image quality factor determined by ________ and ________. - ANSWER-Slice thickness and pixel size Inversion time, In an inversion reco...

Proton - answer-a subatomic particle having a positvie charge identical in magnitude to the negative charge of an electron and, together with the neutron, a component of all atomic nuclei. The proton forms, by itslef, the nucleus of the hydrogen atom. The mass of a proton is approximately 1836 times that of an electron and the mass of an atom is contained almost entirely in the nucleus. The proton has an intrinsic angular momentum or spin and thus a magnetic moment (very small magnetic field). T...

Practice Test 1 ARMRIT with Complete Solutions Practice Test 1 ARMRIT with Complete Solutions Practice Test 1 ARMRIT with Complete Solutions Practice Test 1 ARMRIT with Complete Solutions different tissues that have signals that appear similar on a mr image are described as: - ANSWER-isointense In a large main magnetic field such as those employed in MRI, the motion of a hydrogen proton has been described as wobbling like a spinning top. This motion is called: - ANSWER-Prescessi...