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Philips installed the first Panorama 1T open system
in Las Vegas 3 weeks prior to the start of 2004's RSNA meeting.
Regular delivery for the UK should be from September 2005.
Magnet
The new open magnet for
the Panorama 1T is an actively shielded, superconducting magnet
manufactured by IGC. Extra shimming has been incorporated into the
magnet design to compensate for the openness. Philips have stated
that the homogeneity over 30cm is equivalent to that of the Achieva
magnet.
It has a patient horizontal
gap of 1.6m and vertical gap of 42 cm from the patient table to
the top pole. The magnet gap is 45cm
from pole-to-pole (with the patient table out).
The outside width of the
system is 2.56m and it requires a total installation area of 5 x
8m and has a mass of 7 tonnes.
The field of view for this magnet is 45 x 45
x 45cm.
The patient couch does not swing into the
magnet, as with other manufacturers' designs, but has a lateral
movement to enable wrists, knees and shoulders to be placed at the
isocentre.
Basic monitoring connections (not ECG) have
been incorporated into the end of the patient couch. A second couch
will be offered with favourable pricing options to enable sites
to improve their throughput.
RF System
The Panorama 1T open system
incorporates 8 channel FREEWAVE RF architecture. The internal electronics
are ready for 16 channels but the coils for 16 channel RF are still
in development.
The available Sense coils include:
- 4-channel Sense Head
- 2-channel Sense Neck
- 3-channel Sense Body/Spine
- 2-channel Sense Flex (Large) - good for femur
metastasis imaging in children
- 3-channel Sense Wrist
- 4-channel Sense Breast
Other coils include:
- 2-channel Synergy Body/Spine
- Multipurpose Flex (Medium and Large)
for knees and shoulders.
Note maximum Sense reduction factor at 1T is 2.
A new feature of this Philips system is that the
coil connections are now incorporated into the patient couch, removing
the cables draping over the side, as with other Philips systems.
The coil connections are at both the head and foot end of the bed.
Another feature to highlight is that the integrated
RF body coil can both transmit and receive allowing imaging without
coils on the patient.
Gradients
The gradient system has an amplitude of 26 mT/m
and a slew rate of 80 mT/m/ms.
The system incorporates the Softone noise reduction
system.
Applications
The Panorama 1T open system incorporates the same
clinical functionality as the Achieva but without the spectroscopy
option.
Whole body imaging with Mobiscan can be performed
but with 7-8 steps required
Note this system is not currently aimed at interventional
or radiotherapy planning sites. This is, however, a works in progress
to incorporate the extra features necessary.
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