3TQA: Difference between revisions
From SpinozaWiki
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;'''Preparation:''' | ;'''Preparation:''' | ||
* Get the ''NVC head coil'' and ''200 mm head phantom'' and ''phantom holder''. | * Get the ''NVC head coil'' and ''200 mm head phantom'' and ''phantom holder''. | ||
* Check whether the phantom contains air (bubbles). If so, they shouldn't be larger than about a centimes in width. | |||
* Place the base of the coil on the patient table and remove the cushion. | |||
* Position the phantom in the transverse orientation. The 'T' Marker on the phantom should point to the front side of the magnet as indicated by the red circle on the photo below. Check whether the phantom is inserted correctly; it should be positioned as far back in the coil as possible (i.e. towards the bore) and it shouldn't be able to rotate sideways. | |||
;'''How to run:''' | ;'''How to run:''' | ||
;'''Output:''' | ;'''Output:''' | ||
Revision as of 14:59, 11 August 2022
3T QA procedure
The QA procedure contains several steps. Make sure there is no patch activated while doing them.
1) PIQT
2) Spurious test
3) IQT
4) EPI stability
5) Helium level
PIQT
This scan evaluates internal parameters of the scanner, including the stability of the gradient coils. This is done by scanning a phantom from which the specs are known.
- Duration: 20 minutes
- Preparation:
- Get the NVC head coil and 200 mm head phantom and phantom holder.
- Check whether the phantom contains air (bubbles). If so, they shouldn't be larger than about a centimes in width.
- Place the base of the coil on the patient table and remove the cushion.
- Position the phantom in the transverse orientation. The 'T' Marker on the phantom should point to the front side of the magnet as indicated by the red circle on the photo below. Check whether the phantom is inserted correctly; it should be positioned as far back in the coil as possible (i.e. towards the bore) and it shouldn't be able to rotate sideways.
- How to run:
- Output:
- What if the PIQT indicates problems: