Читать книгу Handbook of MRI Technique - Catherine Westbrook - Страница 18

This contains a description of the correct patient position, placement of the patient within the coil and proper immobilization techniques. Centring and landmarking are described relative to the laser light system on a superconducting system as follows (Figure 1.2):

 The longitudinal alignment light refers to the light running parallel to the bore of the magnet in the z axis.

 The horizontal alignment light refers to the light that runs from left to right of the bore of the magnet in the x axis.

 The vertical alignment light refers to the light that runs from the top to the bottom of the magnet in the y axis.

It is assumed in Part 2 that the following areas are examined with the patient placed head‐first in the magnet:

 head and neck (all areas)

 cervical, thoracic and whole spine

 chest (all areas)

 abdomen (for areas superior to the iliac crests)

 shoulders and upper limb (except where specified).

The remaining anatomical regions are examined with the patient placed feet‐first in the magnet. These are:

 pelvis

 hips

 lower limbs.

Figure 1.2 Positioning of the alignment lights.