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3.0T Radial hip with dual-Flex M/Flex L

ExamCard
van Meel, Marius Philips Healthcare Philips Global

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ExamCard purpose

This release 2.6.3 ExamCard is designed for radial hip studies on Achieva 3.0T.

ExamCard overview

 

PDW_aTSE is a MS acquisition with voxel size 0.49x0.67x2.50 mm. Scan time is 5:04 min.

 

PDW_aTSE spair is a MS acquisition with voxel size 0.55x0.76x2.50 mm. Scan time is 5:40 min.

 

PDW_aTSE M2D is a M2D acquisition with voxel size of 1.19x1.165x2.00 mm. Scan time is 7:30 min.

ExamCard images

Rad-SetUp-Sur This Radial-SetUp-Survey contains all angulations needed for the radial scan and is used to position the 'spokes wheel'.PDw aTSE The radial multislice scan contains a crosstalk artifact at PDw aTSE spair The fat suppressed radial multislice scan contains a crosstalk artifact at
Rad-SetUp-Sur
PDw aTSE
PDw aTSE spair
This Radial-SetUp-Survey contains all angulations needed for the radial scan and is used to position the 'spokes wheel'.
The radial multislice scan contains a crosstalk artifact at "the axle of the spokes-wheel' where the slices overlap.
The fat suppressed radial multislice scan contains a crosstalk artifact at "the axle of the spokes-wheel' where the slices overlap.
PDw aTSE M2D The M2D scan eliminates the crosstalk artifact at the cost of scan time and resolution.
PDw aTSE M2D
The M2D scan eliminates the crosstalk artifact at the cost of scan time and resolution.

 

The advantage of the M2D acquisition is that crosstalk is avoided. However, since an M2D scan acquires one slice per TR, this leads to extra scan time. To reduce scan time again, the resolution is lowered and TR is decreased.

Patient preparation

 

Patient positioning is easy in either head-first or feet-first position on the table. This choice is often based on how comfortable the patient is with receiving the MR scan.

 

The coil choice largely depends on the availability of coils on the site. This ExamCard was built for a dual-coil setup with the SENSE Flex-M and SENSE Flex-L coils.

 

Any other appropiate coil can be used, but FOV or NSA might need to be adapted when using a coil with a larger FOV to prevent backfolding.

 

The picture below demonstrates the setup of the coils. This coil setup is strapped around the hip of interest with the Flex-L coils anterior and posterior and the Flex-M coils in lateral position.

 

Arrange that the patient's feet are turned inward to pronate the greater trochanters, while being supported in position with velcro straps wrapped around the feet. A sponge should be placed  between the ankles to maintain the inward position of the feet and toes.

Dual-coil setup
Dual-coil setup

 

 

For detailed instructions, see also the application tip that was published in FieldStrength issue 38 (summer 2009).



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Added:
Oct 28, 2009

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ExamCard
Achieva 3.0T
Release 2.6
Quasar, Quasar Dual
3T, dual-coil, Hip, MSK, Musculoskeletal, radial
 

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