RF Coils Use and Safety Part 4

What is the primary purpose of an RF coil power distribution map in MRI safety?. To determine the weight of the RF coil. To assess the risk of RF-induced heating based on an item's location. To measure the strength of the static magnetic field. To calculate the amount of liquid helium remaining in the tank.

On a standard RF power distribution map, what does the horizontal axis (z-axis) represent?. The left-to-right axis of the magnet. The head-to-foot axis of the magnet. The vertical height of the magnet. The time duration of the scan.

In an RF power distribution graph, what does the value "0" on the horizontal axis typically represent?. The ISO center of the magnet. The entrance to the scan room. The end of the patient table. The location of the computer console.

What percentage of the maximum RF power is received by an object located exactly at the ISO center?. 0%. 25%. 50%. 100%.

According to the power map examples, what happens to the RF power as you move further away from the ISO center?. The RF power increases significantly. The RF power remains constant at 100%. The RF power decreases. The RF power turns into ionizing radiation.

If an object is located approximately 25 centimeters (0.25 meters) from the ISO center on the Philips map shown, what percentage of RF power would it receive?. 100%. Approximately 50%. Approximately 20%. 0%.

Why is it important to have an RF power map specific to your MRI system?. Because all MRI systems use the exact same RF transmitter coil. Because power distribution depends on the specific design and length of that system's RF transmitter coil. To ensure the floor of the room is level. To help the patient choose the right music for the scan.

What is the status of the risk of RF-related heating for an item located outside the volume of the RF transmitter coil?. The risk is extremely high. The risk is identical to being at the ISO center. The risk of RF-related heating is very low. There is no magnetic field outside the coil.

Based on the maps shown, a typical integrated body coil is approximately how long?. 10 centimeters. 10 centimeters. 200 centimeters. 5 meters.

Which vendor's power distribution maps were explicitly featured as examples in this training video?. Only Siemens. Only GE. Philips, Siemens, and GE. Canon and Toshiba.