Prescan

Prescan optimizes the system’s transmit and receive values for each patient and area of interest. Every patient is a unique collection of protons and requires a unique combination of RF and power to image.

There are multiple prescan options, which are selected from the Scan menu:

• Auto Prescan
• Manual Prescan
• Spectroscopy Prescan

  

The primary reasons for prescan are:

• to include a calibration scan for tasks that have a PURE filter, an ASSET imaging option, or both.
• to adjust the system settings (center frequency, transmit gain, receive gain etc.) for optimum image quality
• to optimize auto shim values (when selected) for homogeneity improvement of the magnetic field with the patient in the bore
• to allow the manual optimization of chemical saturation