Beschreibung der Beschaffung
The subject of the present tender procedure is the delivery of the MRI system to Lichtenbergstrasse 8, 85748 Garching, Germany, including standard software and the provision of operational readiness in accordance with the following minimum requirements.
The MRI system must contain
(a) at least one magnet;
(b) at least one gradient system for each of the three axes (x, y and z);
(c) at least one transmit and one receive radiofrequency (RF) coil;
(d) the controlling electronics;
(e) the standard imaging software installed on a computer Workstation; and
(f) the system must be brought into operational readiness.
Tenders which do not meet these minimum requirements will be excluded.
Requirements for the magnet System:
(a) magnet type: permanent or cryogen-free superconducting;
(b) field strength: 0,3T — 0,4T;
(c) visualized field of view: > 250 mm;
(d) magnet weight: < 12 000 kg.
Requirements for the gradient System:
(a) gradient system enabled in each of the three axis (x,y and z);
(b) maximum gradient amplitude: > 20 mT/m;
(c) maximum slew rate: > 42 mT/m;
(d) minimum rise time: < 0,5 ms from 0 to 22 mT/m.
Requirements for the transmit and receive coil System:
(a) minimum one transmit coil;
(b) minimum one multi-array receive coil with > 2 coil channels;
(c) coil integration from third-party suppliers (e.g. with a coaxial connector or a BNC connector) must be guaranteed.
Requirements for the controlling electronics:
(a) digital spectrometer channel count: > 8 receive channels;
(b) maximum RF power: > 3 kW;
(c) analog-to-digital converter (ADC): > 16 bits;
(d) receiver bandwidth: > 200 kHz;
(e) power consumption of entire system: < 8 kVA (< 2 kVA in stand-by).
Requirements for the standard software including computer Workstation:
(a) minimum software imaging sequences: 2D and 3D spin echo, 2D and 3D gradient echo;
(b) required image reconstruction software from measurement to image: data processing, Fourier Transform, DICOM storage, and data visualization;
(c) computer workstation with software installed according to a) and b);
(d) computer workstation should consist of a PC desktop with at least one processor (e.g. Intel Core i5 or comparable), one graphic card (e.g. 1GB Nvidia GeForce or comparable), > 18" LCD monitor, keyboard, mouse, > 4 GB RAM memory, > 300 GB hard disk.
Requirements for establishing the operational readiness of the MRI System:
(a) delivery must include all of the aforementioned system components;
(b) after delivery of system components to location specified above, the contractor must install them. Installation includes all electric connections, magnet ramp-up (only in the case of a cryogen-free superconducting magnet), and system calibration;
(c) the controlling electronics must be integrated into the computer workstation (e.g. via Ethernet, wireless connection, Bluetooth, Powerline adapters or MoCA adapters);
(d) the contractor will demonstrate operational readiness of the MRI system by means of a gradient echo imaging experiment on a 250 mm x 250 mm field of view (5 x 5 egg tray), which will be approved by TUM.