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| == Quality Control procedure ==
| | The Quality Control (QC) procedure at the Spinoza centre is composed of a weekly and monthly protocol consisting various tests and checks. The QC is usually performed by the scan-assistants of the Spinoza centre, supervised by Tinka and Steven. All relevant data is saved into an excel-file. Below, both procedures are summarized. |
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| The Quality Control (QC) procedure at the Spinoza centre is composed of a weekly and monthly protocol consisting various tests and checks. The QC is usually performed by the scan-assistants of the Spinoza centre, supervised by Tinka and Steven. Below, both procedures are summarized. | |
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| == Weekly quality control procedure == | | == Weekly quality control procedure == |
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| '''Scans''': | | '''Scans''': |
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| - Philips Intelligent Quality Test (PIQT): quality check of spatial stability.
| | * Philips Intelligent Quality Test (PIQT): quality check of spatial stability (uses 1 channel headcoil and Philips PQT phantom). |
| | | * BOLD-fMRI (EPI) and DTI-test using the AGAR-phantom: quality check of temporal stability (uses 32 channel headcoil) |
| - BOLD-fMRI (EPI) and DTI-test using the AGAR-phantom: quality check of temporal stability.
| | * Spurious test: quality check of homogeneity of static magnetic field. |
| | | * QPI: check for spikes. |
| - Spurious test: quality check of homogeneity of static magnetic field.
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| - QPI: check for spikes.
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| '''Check scanner computer''': | | '''Check scanner computer''': |
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| - Virus scan (monthly) and updates (weekly)
| | * Virus scan (monthly) and updates (weekly) |
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| '''Check stimulus-set up in scanner room''': | | '''Check stimulus-set up in scanner room''': |
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| - Set-up projection screen, beamer, and projected image
| | * Set-up projection screen, beamer, and projected image |
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| | * Response boxes |
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| - Response boxes
| | * GSR/Eyetracker batteries |
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| - GSR/Eyetracker batteries
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| | '''Check stimulus-computer''': |
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| Check stimulus-computer:
| | * Virus scan and update |
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| - Virus scan and update
| | * Windows updates |
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| - Windows updates
| | * Volume settings, headphone sound quality, Presentation licence |
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| - Volume settings, headphone sound quality, Presentation licence | | * Trigger counter (during EPI-scan of the AGAR phantom) to check whether pulses are sent to the stimulus computer. |
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| - Trigger counter (during EPI-scan of the AGAR phantom) to check whether pulses are sent to the stimulus computer.
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| | '''Check, cubicle computers (incl. NPO) and Mock scanner''' |
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| Check, misc.:
| | * Presentation license |
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| - Helium level
| | * Virus scan and update |
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| - Temperature
| | * Windows update |
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| - Back-up ProefpersonenRegistratie and Quality Control log (excel-sheets)
| | * Mock scanner: check projection screen/image, headphones (and audio settings), response-boxes |
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| - Amount of screening-forms, information brochures, and "Toestemmingsverklaringen"
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| == Spikes ==
| | '''Check, other''': |
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| '''When recording data'''
| | * Helium level |
| When recording data you can see whether any possible spikes were present by inspecting the qpi values. This is a propietary value generated during recordings reporting on the smoothness of k-space. You can inspect the qpi values that were present during your recording via the Logging Applications
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| Start --> MR Applications --> Logging Application
| | * Temperature |
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| An asp page starts. Enter '''qpi''' in free text box and select proceed. Next you get a screen indicating the qpi recordings that were measured during the day. Find your date en moment of recording. The qpi values should, in principle be 0 or close to 0. Values below 20 indicate minor problems that do not interfere with data analysis or the visual inspection of data. Values above 200 are definatly problematic. Please report any value above 20 immediatly.
| | * Back-up ProefpersonenRegistratie and Quality Control log (excel-sheets) |
| All QPI values are also evaluated on a weekly basis during the quality control procedure.
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| == Spurious test when installing new equipment or changing something in the MRI enviroment ==
| | * Amount of screening-forms, information brochures, and "Toestemmingsverklaringen" |
| When new epquipment is installed or something is changed in the MRI enviroment a spurious test should be performed. This can be done from service mode.
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| !! Crucial, make sure the headcoil is not connected to the system
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| Enter service mode.
| | == Monthly Quality Control procedure == |
| Go, in the acquisition enviroment to:
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| System --> Advanced Tools --> Scan Utilities.
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| Select the Scan Utilities in the pane on the left hand side.
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| Select 1 (enter service mode)
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| Select 2 (Batch Interpreter)
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| Select 15 (spurious_t30_180hz_qbc)
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| Select proceed
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| The spurious test now starts and will last for approximatly 4 minutes. After this a new subject has been created in the exam list called 'spur T30 180Hz/px'. Select New exam and open the 'subject'. Use the + sign to inspect the four images that have been created. That should be nice and homogenous as in the figure below on the right hand side and not contain no lines as in the figure below on the left hand side.
| | Will be uploaded soon. |
The Quality Control (QC) procedure at the Spinoza centre is composed of a weekly and monthly protocol consisting various tests and checks. The QC is usually performed by the scan-assistants of the Spinoza centre, supervised by Tinka and Steven. All relevant data is saved into an excel-file. Below, both procedures are summarized.
Weekly quality control procedure
Scans:
- Philips Intelligent Quality Test (PIQT): quality check of spatial stability (uses 1 channel headcoil and Philips PQT phantom).
- BOLD-fMRI (EPI) and DTI-test using the AGAR-phantom: quality check of temporal stability (uses 32 channel headcoil)
- Spurious test: quality check of homogeneity of static magnetic field.
- QPI: check for spikes.
Check scanner computer:
- Virus scan (monthly) and updates (weekly)
Check stimulus-set up in scanner room:
- Set-up projection screen, beamer, and projected image
Check stimulus-computer:
- Volume settings, headphone sound quality, Presentation licence
- Trigger counter (during EPI-scan of the AGAR phantom) to check whether pulses are sent to the stimulus computer.
Check, cubicle computers (incl. NPO) and Mock scanner
- Mock scanner: check projection screen/image, headphones (and audio settings), response-boxes
Check, other:
- Back-up ProefpersonenRegistratie and Quality Control log (excel-sheets)
- Amount of screening-forms, information brochures, and "Toestemmingsverklaringen"
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Monthly Quality Control procedure
Will be uploaded soon.