Glossary - Boston Scientific ImageReady Mode D'emploi

Glossary

Glossary
Hertz (Hz) – a unit of frequency in Hertz or cycles per second. One Megahertz (MHz) is one million cycles
per second.
MR Conditional – an item with demonstrated safety in the MR environment within defined conditions.
1
At a minimum, these address the conditions of the static magnetic field, the switched gradient magnetic
field and the radio frequency fields. Additional conditions, including specific configurations of the item,
may be required.
MRI – Magnetic Resonance Imaging.
Radio Frequency (RF) – high frequency electrical fields whose frequencies are in the range of 10,000 Hz
and above. The RF used in the 1.5T MRI Scanner is ~64MHz.
Specific Absorption Rate (SAR)
– radio frequency power absorbed per unit of mass (W/kg).
1
IEC 60601-2-33
Tesla (T) – the unit of measure of magnetic field strength. One T is equal to 10,000 Gauss.
MRI Transmit/Receive RF Body coil – a coil used to transmit and to receive RF energy that encompasses
the entire body region within the MR system bore.
MRI Transmit/Receive RF Quadrature Head coil – a coil used to transmit and to receive RF energy that
is constrained to the head region, and configured to use circular polarization (CP).
W/kg – Watts per kilogram, a measure of the power that is absorbed per kilogram of tissue.
1 ASTM F 2503-13, "Standard Practice for Marking Medical Devices and Other Items for Safety in the Magnetic Resonance Environment"
ImageReady MRI Guidelines for Spectra WaveWriter Spinal Cord Stimulator System
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