PT3 Chapter 1&2: Introduction, Chart overview and History | Hardware-, Software requirements and Safety Quiz Please purchase the course before taking this quiz. Exceeding the threshold of sensation using strong gradients can give sensory stimulation. True False BOLD imaging was developed in different parts of the world in 1990-1992. True False A blipped gradient is a constant switched on a gradient. True False A multi shot EPI is a segmented method. True False Which is true? The basic EPI RF sequences exist out of an excitation RF pulse, with or without a 180° refocusing RF pulse and possibly preceded by magnetization preparation. An EPI RF sequence consists out of a continuous signal acquisition in the form of a GRE train, to acquire total or partial excitations of RF pulses. The Nottingham Orange is made with an EPI RF sequence in 1980. True False Sir Peter Mansfield was involved in NMR microscopy, discovering echoes in the presence of strong bipolar coupling, active shielding of gradients and in DTI and active shielding of gradient coils. True False EPI can collect an MR image, from a single FID signal. True False The rapidly changing magnetic fields are induced by the RF pulses. True False EPI RF sequences need rapid rise times and high peak amplitudes nowadays. True False Which is true? NMR imaging was changed to MRI to avoid confusion with other medical imaging modalities using ionizing radiation. EPI is possible with fMRI, DTI and spectroscopy. Gradients used in EPI are generally named: slice select, blipped and switched. True False Improvement of hardware related to EPI RF sequences was developed in the 80ties. True False Which is true? High performance gradients with rapid rise times and high peak amplitudes are needed for EPI RF sequences. Very fast ADC’s (analogue- to digital converters), up to 1 MHz, are required for EPI RF sequences.
