government of chhattisgarh - health.cgeprocure... - e-procurement

Whole body 3 Tesla Magnetic Resonance Imaging System optimized for higher performance in Cardiac, Body
and neuroradiological examination with short super conducting magnet, High performance Gradient and
Digital radiofrequency. All capabilities are detailed below should be integral part of the quotation and none of
these essential requirements should be quoted as optional. If supplier has any advanced application or
techniques available with them, the same may be quoted as optional.
1 Magnet System
a. Magnet should be superconductive with a field strength of 3T+ 0.12T
b. It should have 70cm patient bore after positioning of gradient, shim, and RF antena. The magnet should have the
facilities of better illumination, ventilation and designed to avoid patient claustrophobia
c. Magnet should be shielded from external interference. 5 gauss line should within the confine of the magnet room
d. Homogeneity of the magnet should be mentioned in relation to 10,20,30,40, and 45 cm DSV, Give details of
number of plane plots and number of measurements per plane to measure the homogeneity
e. Global and local auto shimming should be available. Automated patient specific on line shimming should be
available. Shim channels or any other method to correct the patient induced field distortions must be present.
Facility of high order shimming should be available.
f. Specify the weight of the magnet including gradients and cover etc..
g. The front panel display at the magnet should display coil table position
2 Gradient System
1. Active shielded gradient system with strength of at least 40mT/m or more with the slew rate of 200mT/m/sec or
more. This slew rate of 200mt/m/sec at 40 mT/m gradient should be available in each axis independent, for over all
better duty cycle performance of the gradient.
2. Duty cycle should be 100 percent, Give details.
3. Gradient should have the provision for eddy current compensation.
4. Gradient should be capable of delivering the desired clinical performance.
a. Largest field of view should be at least 40 cm in all axis.
b.Minimum TE in Gradient Echo 2D/3D should be specified for all sequences.
c. Minimum slice thickness in 2D should be specified.
d. Minimum slice thickness in 3D should be specified.
e. Maximum Echo Train Length in both SE and GRE should be at least 256.
f. Measurement matrix should be from 128X128 to 512x512 in both 2D and as well as 3D imaging.
3 RF System
1 RF system should be fully digital with transmit power of at least 15Kw.
2 RF system should have maximum number of independent RF receiving channels with each having a band width of
1MHZ or more.
3.Should have necessary hardware to support phased array coils.
4 Specify frequency stability and amplifier resolution.
5 RF system should be compatible with parallel imaging techniques. It should be able to support time reductions with
compatible coils in 2D/3D imaging in Body/Neuro imaging upto atleast a factor of 2.
6 RF amplifier should be solid state for over all better performance.
7. Optical RF receiver system with RF receiver located on the magnet system inside the shielded scan room
8. RF transmit technology-Multi drive RF transmit system should be offered with two independent output channels to
improve RF uniformity and signal homogeniety.
4 RF Coils
RF coils form an important part of imaging chain. High density posteriorly embedded element coils
compatible with parallel imaging techniques should be quoted. All the array coils should be compatible with
Parallel Imaging techniques.
1 The main body coil integrated to the magnet must be Quadrature/CP. In addition to this following coil should be
quoted.
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