3T QA: Difference between revisions

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Latest revision as of 09:46, 1 November 2018

Preparation

Make sure there is no patch activated
Create a new patient using the following naming convention: QA_3T_yyyymmdd.
Use the 3TQA scancard under SC > QA > 3TQA_20180313.

After loading the exam card, right click in or below the sequences to find the Edit Scan Control Parameters... option. Set the Auto coil: ch. sel. SNR loss parameter (at the bottom) under the Reconstruction tab to 0 (this ensures all channels are used). Click apply so that the setting is saved for the current login session (clicking Store will save this setting permanently!).
Open the FBIRN sequence and find the coils tab. Make sure that Smart Select is turned off.

Phantom placement

Use the 32-channel head coil.
Remove the cushioning inside the head coil to reveal two small depressions. Place the red base with the appropriate feet in the depressions and make sure that it's level.
Place the FBIRN phantom on the red base. Make sure that the nozzle and sticker are facing straight up.
Position the phantom so that the laser is at the same level as the nozzle.

Scanning

Make sure all geolinks are set to TRA.
Planning is the easiest on the FBIRN sequence due to its large window. Change the angulation by setting AP (deg), RL (deg) and FH (deg) to 0. Proceed to plan the scan so that the midlines are in the center of the phantom in all directions.
Starting the scan will result in both PNS and SAR warnings, which may be ignored.

Post scanning

Export the entire patient (in classic dicom format) to S: > projects > 3TQA.

Helium check: Go to: Start>MR-Development>Display Helium level and press Measure Helium Level (Not during scanning!). Note down helium level in Notepad file under S: > scdropbox > 3T_QA > Helium_measurements_3T

Close the program, remove the phantom and log off

Perhaps it's an idea to include a short description of how the data for each sequence will be analyzed/what the use is? For example the comparison between the two DTIs for enhanced vs default gradient mode.

@@ Line 1: / Line 1: @@
 ====Preparation====
-* Start the software using the QA Patch.
+* Make sure there is no patch activated
-* Create a new patient using the following naming convention: 3T_QA_yyyymmdd
+* Create a new patient using the following naming convention: QA_3T_yyyymmdd.
-* Use the QA_BIRN_32ch_def3 scancard under SC > QA.
+* Use the 3TQA scancard under SC > QA > 3TQA_20180313.
-* After loading the scancard, right click below the sequences to find the ''control scan parameters'' menu. Find the ''coil selection'' parameter under the rightmost tab (name?) and change it to ''full manual''. Click apply so that the setting is saved for the current login session. Clicking Store will save this setting permanently.
-* Open the fBIRN sequence and find the ''coils'' tab. Make sure that ''Smart Select'' is turned off and that all elements are selected (blue) for every coil. Changing the coil settings for one sequence should automatically update the settings for all other sequences.
+* After loading the exam card, right click in or below the sequences to find the ''Edit Scan Control Parameters...'' option. Set the ''Auto coil: ch. sel. SNR loss'' parameter (at the bottom) under the Reconstruction tab to ''0'' (this ensures all channels are used). Click apply so that the setting is saved for the current login session (clicking Store will save this setting permanently!).
+* Open the FBIRN sequence and find the ''coils'' tab. Make sure that ''Smart Select'' is turned off.
 ====Phantom placement====
+* Use the 32-channel head coil.
 * Remove the cushioning inside the head coil to reveal two small depressions. Place the red base with the appropriate feet in the depressions and make sure that it's level.
-* Find the fBIRN phantom and place it on the red base. Make sure that the nozzle and sticker are facing straight up.
+* Place the FBIRN phantom on the red base. Make sure that the nozzle and sticker are facing straight up.
 * Position the phantom so that the laser is at the same level as the nozzle.
 ====Scanning====
 * Make sure all geolinks are set to TRA.
-* Planning is the easiest on the fBIRN sequence due to its large window. Change the angulation by setting ''AP (deg)'', ''RL (deg)'' and ''FH (deg)'' to 0. Proceed to plan the scan so that the midlines are in the center of the phantom in all directions.
+* Planning is the easiest on the FBIRN sequence due to its large window. '''Change the angulation by setting ''AP (deg)'', ''RL (deg)'' and ''FH (deg)'' to 0'''. Proceed to plan the scan so that the midlines are in the center of the phantom in all directions.
 * Starting the scan will result in both PNS and SAR warnings, which may be ignored.
 ====Post scanning====
-* Export the entire patient to ftpsc_classic
+* Export the entire patient (in classic dicom format) to S: > projects > 3TQA.
-* Locate the ''EPI stability tool'' output in G: > Site > Clinicalscience > epi_stability_tool, where you should find a .txt output file. Check whether the time and date of the last update are correct, then copy the file to scdropbox > 3T_QA. Alter the name of the file to 3T_QA_EST_yyyymmdd.
-* Open the ''control scan parameters'' menu and set the ''coil selection'' parameter back to ''restricted''.
+* Helium check: Go to: Start>MR-Development>Display Helium level and press Measure Helium Level (Not during scanning!). Note down helium level in Notepad file under S: > scdropbox > 3T_QA > Helium_measurements_3T
+* Close the program, remove the phantom and log off
-'''Perhaps it's an idea to include a short description of what is being checked with which sequence? For example the comparison between the two DTIs for enhanced vs default gradient mode.'''
+'''Perhaps it's an idea to include a short description of how the data for each sequence will be analyzed/what the use is? For example the comparison between the two DTIs for enhanced vs default gradient mode.'''