3 fields used in mri - Study guides, Class notes & Summaries

RADT 1010 Chapter 1 Questions and Answers Graded A+ How does an ultrasound work in radiology? Ultrasound uses high-frequency sound waves to produce images of soft tissues and organs inside the body, often used in pregnancy monitoring and diagnosing abdominal conditions. Why is safety important in radiology? Safety is critical in radiology to minimize exposure to radiation for both patients and staff, ensuring proper shielding and radiation dose control during procedures. What is ...

Is SNR proportional or inversely proportional to voxel volume - ANSWERS-Proportional 3 fields used in MRI - ANSWERS--static magnetic field -TVMF (gradient field) -RF field 3 main types of magnets used - ANSWERS--Superconducting (most common_ -Resistive -Permanent FDA limits for the 3 fields in MRI - ANSWERS-Static field: 2T TVMF: 3T/s RF field: - does not cause an increase in temperature of more than .5 deg C or any body part of 1 deg C -SAR does not exceed 1W/kg avg over 25% o...

Is SNR proportional or inversely proportional to voxel volume - ACCURATE ANSWER-Proportional 3 fields used in MRI - ACCURATE ANSWER--static magnetic field -TVMF (gradient field) -RF field 3 main types of magnets used - ACCURATE ANSWER--Superconducting (most common_ -Resistive -Permanent FDA limits for the 3 fields in MRI - ACCURATE ANSWER-Static field: 2T TVMF: 3T/s RF field: - does not cause an increase in temperature of more than .5 deg C or any body part of 1 deg C -SAR does...

The NMV is rotated to the physical negative Z axis by applying a...? - C)180 pulse Increasing which parameter is considered the "best" technique for improving image quality? - C)NEX Studies have concluded that static magnetic fields up to what tesla produce no substantial harmful biological effects. - C)2.0 Tissues that have low (short) relaxation times have: - Higher relaxation rates Nuclei in their natural enviroment ( in the absence of a significant magnetic field) are aligned... - Ra...

Is SNR proportional or inversely proportional to voxel volume - Proportional 3 fields used in MRI - -static magnetic field -TVMF (gradient field) -RF field 3 main types of magnets used - -Superconducting (most common_ -Resistive -Permanent FDA limits for the 3 fields in MRI - Static field: 2T TVMF: 3T/s RF field: - does not cause an increase in temperature of more than .5 deg C or any body part of 1 deg C -SAR does not exceed 1W/kg avg over 25% of whole body for longer than 15mins -S...

MRI CAMRT Exam Questions With Correct Answers Is SNR proportional or inversely proportional to voxel volume - answerProportional 3 fields used in MRI - answer-static magnetic field -TVMF (gradient field) -RF field 3 main types of magnets used - answer-Superconducting (most common_ -Resistive -Permanent FDA limits for the 3 fields in MRI - answerStatic field: 2T TVMF: 3T/s RF field: - does not cause an increase in temperature of more than .5 deg C or any body part of 1 deg C -SAR doe...

NSG 6420: NEURO DISORDER EXAM QUESTIONS AND ANSWERS HEADACHE TRIGGERS -Answer-MIGRAINE • Stress • Caffeine • Altered sleep • Specific foods, missed meals • Menses • Alcohol • Hormone supplements CLUSTER • Smoking • Alcohol • Vasodilators • Seasonal changes • Altitude changes TENSION • Stress • Fatigue/lack of sleep • Anxiety/depression • Caffeine/tobacco overuse • Latent hostility CN Assessments -Answer-CN I, olfactory After establishing patency of nos...

use of x-rays to create a medical image on patients is referred to as: radiography 3 multiple choice options Particular care must be taken when using radiation for medical imaging. This is the result of radiation's ability to create __________ in human tissue and possible biochemical changes. ionizations 3 multiple choice options In the diagnosis of patient disease states, physicians can select from an array of medical diagnostic modalities. A few of these involve the use of ioniz...

MRI uses _______________and _______________to obtain a mathematically reconstructed image. - correct answer Magnetic fields and radio waves The MRI image represents differences in the patient's tissues in the number of____________________ and the rate at which they recover from radiofrequency stimulation. - correct answer Nuclei Which nucleus is most suitable for MRI? and Why? - correct answer Hydrogen (single-proton nucleus) The large amount of hydrogen present in any organism (Hydroge...

Magnetic Resonance Imaging (MRI) Questions and Answers 2023 What does MRI rely on? [3] electromagnetic fields, radio waves, and hydrogen levels in the body What % of the human body is hydrogen? 70% What distinguishes MRI from CAT scans/x-rays? no ionising radiation present What is magnetic force measured in? tesla At what strength is the MRI magnet maintained? constant tesla strength What is the magnetic strength of clinical scanners? approx. 1.57, 3T,...