3TQA: Difference between revisions
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* Place the base of the coil on the patient table and remove the cushion. | * 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. | * 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. | ||
* Place the top part on the coil. | |||
* Position the coil using the light visor; the beam must be on the horizontal line. | |||
* Use ''Travel to scan'' plane to position the coil in the magnet center. | |||
;'''How to run:''' | ;'''How to run:''' | ||
;'''Output:''' | ;'''Output:''' | ||
Revision as of 15:00, 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.
- Place the top part on the coil.
- Position the coil using the light visor; the beam must be on the horizontal line.
- Use Travel to scan plane to position the coil in the magnet center.
- How to run:
- Output:
- What if the PIQT indicates problems: