MRSO prep exam
MRSO prep exam IEC DB/DBA limits for MRI - ANSWER-140 DB 99 DBA parameters to reduce noise in MRI - ANSWER--thicker slices -larger FOV -smaller matrix -parallel imaging -reducing bandwidth (increasing TE) -active noise reduction -Low SAR RF mode (increase in echo spacing)-thicker slices MRI sequence that produces the most and least noise in MRI - ANSWER-Most noise EPI/DWI least noise spin echo sequence an increase in slew rate and gradient amplitude causes an increase in - ANSWER-Peripheral nerve stimulation stimulation of the eyes in a patient causing an appearance of flashing lights - ANSWER-magnetophosphenes stimulation of the vestibular system causing a vestibular ocular reflex where the eyes rapidly move side to side - ANSWER-nystagmus what force causes the noise heard in MRI - ANSWER-lorentz forces B1+rms - ANSWER-the amplitude of the B1 frequency over 10 seconds--the intensity of the changing magnetic field in our patient will determine the amount of energy transferred to our patient
Información del documento
- Subido en
- 18 de agosto de 2023
- Número de páginas
- 11
- Escrito en
- 2023/2024
- Tipo
- Examen
- Contiene
- Preguntas y respuestas
