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HFO TRANCE for lower legs

ExamCard
Sakari, Päivi Philips Healthcare Philips Global

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ExamCard purpose

This release 2.1.3 Panorama HFO ExamCard has been created for imaging lower leg arteries without contrast agent.

ExamCard overview

HFO TRANCE for lower legs
Scan 1Coronal scout
Scan 22D QF TFE
Scan 33D TSE diastole
Scan 43D TSE systole

Scan first the coronal scout. The MIP images will be created automatically. Plan the 2D Quantitative Flow TFE scan perpendicular to the vessel.

 

2D QF TFE: adjust the PC velocity in the sequence. Choose PC velocity encoding some what higher than the maximum expected bloodflow velocity to avoid aliasing.

 

Scan cardiac triggered 3D TSE scan twice:

First set the trigger delay such that the scan is performed in the diastole phase (delay time longest). Here both arteries and veins will give a high signal.

 

Secondly adjust the trigger delay such that the scan is performed in the systole phase (delay time of approximately 200ms). Arteries will give a low signal, while the veins will give a high signal.

 

Using Volume View subtract the systole images from the diastole images to obtain a dataset with only bright arteries. 

 

ExamCard images

Coronal scout The coronal scout is used to position the 2D QF TFE scan perpendicular to the vessel.2D QF TFE/M The diastolic TFE/M image is used to define the trigger delay.Q-Flow measurement Define the delay time for systole scan
Coronal scout
2D QF TFE/M
Q-Flow measurement
The coronal scout is used to position the 2D QF TFE scan perpendicular to the vessel.
The diastolic TFE/M image is used to define the trigger delay.
Define the delay time for systole scan
3D TSE diastole With the trigger delay at longest, both arteries and veins will give a high signal.3D TSE systole With a specific trigger delay 
arteries give a low signal, while
veins give a high signal.Subtraction image Only arteries are visualized.
3D TSE diastole
3D TSE systole
Subtraction image
With the trigger delay at longest, both arteries and veins will give a high signal.
With a specific trigger delay arteries give a low signal, while veins give a high signal.
Only arteries are visualized.

Patient preparation

Position the patient supine, feet first on the table. Use extra pads to position the patient's lower legs closer to the isocenter. ECG triggering is necessary.



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ExamCard
Panorama HFO
Release 2, Release 2.5, Release 2.6
Pulsar
Peripheral MRA, Vascular
 

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