GE Discovery PET/CT 690

Manufacturer: GE HealthCare Modality: PET/CT Production: 2011–present

Hybrid molecular imaging workhorse. 24-ring LYSO PET detector (13,824 crystals) with Time-of-Flight on top of a 64-slice CT derived from the LightSpeed VCT. Drives most U.S. outpatient oncology PET/CT volume.

Quick facts

• LYSO crystals, 4.2 × 6.3 × 25 mm · 13,824 total · 24 rings
• Time-of-Flight, ~500 ps timing resolution
• CT side: 64-slice, 70 cm gantry, Performix Pro tube (shared with LightSpeed VCT)
• Internal gantry cooling — no external chiller for PET/CT gantry
• Ge-68 automated rod-source calibration
• Introduced 2011; still GE's active-catalog PET/CT 690-class platform

Parts

PET-specific:

• LYSO Crystal Block
• PMT Modules
• ToF / Coincidence Electronics

Shared with LightSpeed VCT:

• Performix Pro VCT 100 Tube
• VDAS
• Slip Ring Assembly

Field Guide

See field-guide/ge-healthcare-discovery-690 — PET failure domain (crystals / PMTs / ToF timing), CT overlap with LightSpeed VCT, radiotracer / nuclear regulatory posture.

Related

• GE Discovery MI (digital PET successor)
• GE Discovery VCT / STE (BGO predecessor)
• GE LightSpeed VCT 64 (CT base — shared hardware)
• Siemens Biograph mCT (competitor)
• Philips Gemini TF (competitor)