• Topic ID: id_2012363
  • Version: 5.1
  • Date: Dec 6, 2019 11:36:30 AM

Dual drive quadrature tool overview

A dual drive system has two transmit channels. The dual drive (DD) quadrature tool is used to compensate for the amplitude and phase differences in the transmit channels. Amplitude and phase differences between the two channels can begin at the exciter and be carried through to the body coil transmit (the end of the imaging chain). Those differences can also be introduced at any of the intermediate passive components.

The dual drive quadrature tool performs axial scans in three modes.

  • Combined mode
  • CH1 transmit, CH2 disabled
  • CH2 transmit, CH1 disabled

The dual drive quadrature tool calculates amplitude difference between the CH1 and CH2 channels. It also calculates phase difference between the CH1 and CH2 channels. It then updates the system calibration file with the cumulative compensation required.

Test mode without calibration is provided.

Figure 1. Flowchart of dual drive quadrature tool

Figure 2. Dual drive quadrature tool GUI

Locator Item Description
2 Start Click Start to start the calibration.
3 Abort Click Abort to abort the calibration process.
4 Test Click Test to confirm the test results. The calibration file is not updated.
5 Reset Reset the initial value to Default(0,0) or the last calibration value.
6 Status Displays the dialogue of the procedure.
7 Center Displays calibration/test status of the location.
8 Config The value is the calibration file and is updated when a successful calibration is completed.
9 Initial Initial value before adjustment.
10 Residual Residual after the compensation is applied.
11 Data Analysis This mode allows the user to re-analyze scanned data acquired with the dual drive quadrature tool. It includes the combined image exam, series, image number, and prompts the user for the Pfiles created by the individual channel scans.

This mode does not update the calibration file.

This mode can also be used for troubleshooting because it provides some freedom in how the data is acquired.
12 Run Analysis Click Run Analysis to initiate the data analysis process.
13 Quit Quits the dual drive quadrature tool.

Before starting the dual drive quadrature tool procedure

notice: Before starting a dual drive quadrature calibration scan, confirm that there is no exam in progress. If there is an exam in progress, select End Exam.