systemSiemensPET CTfamily: biograph-truepoint

Siemens Biograph 64 (TruePoint / TrueV)

Family: Siemens Biograph TruePoint · Modality: PET/CT

Flagship of the Siemens Biograph TruePoint family and direct competitor-era PET/CT to the GE Discovery 690 / Discovery STE / VCT class. Biograph 64 pairs the LSO PET detector architecture with a 64-slice CT derived from the SOMATOM Sensation 64 platform — bringing z-Sharp flying focal spot, STRATON tube, 80 kW generator, and CARE Dose4D into an integrated PET/CT chassis. Large global installed base; one of the most-traded Siemens premium PET/CT platforms in the secondary market.

PET detector architecture (TruePoint / TrueV)

  • LSO crystals — 4.0 × 4.0 × 20 mm; 169 crystals per detector block.
  • 144 detector blocks on base configuration; 192 blocks with TrueV option.
  • Transaxial FOV 605 mm.
  • Axial FOV — 162 mm base; 216 mm with TrueV.
  • 81 image planes base; 109 with TrueV.
  • ToF performance — ~540 ps coincidence timing on ToF-capable revisions.
  • NECR peak — 96 kcps at 35 kBq/cc base; 165 kcps at 32 kBq/cc with TrueV.
  • Sensitivity — 4.2 cps/kBq at 435 keV base; 7.6 cps/kBq with TrueV.
  • 435 keV energy threshold — tight energy window enabled by LSO's high energy resolution.

TrueV option

The TrueV configuration adds 48 detector blocks, extending the axial FOV from 162 mm to 216 mm. Clinical consequences:

  • Fewer bed positions per whole-body scan — shorter total acquisition time or higher sensitivity at matched time.
  • Higher peak NECR — 165 kcps vs 96 kcps base; supports higher-activity protocols or lower injected dose at matched image quality.
  • Standard on most late-production Biograph 64 units; verify at acceptance.

CT side (Sensation 64 lineage)

  • 64 reconstructed slices via z-Sharp flying focal spot on a 32-row UFC detector (shared with Sensation 64 standalone CT).
  • 0.33 s minimum rotation — cardiac CTA workflows supported.
  • STRATON tube · 80 kW high-frequency generator · 5 MHU/min heat dissipation.
  • CARE Dose4D — 4D tube-current modulation.
  • syngo CT host.

Specs

  • LSO PET (4.0 × 4.0 × 20 mm crystals)
  • Transaxial FOV 605 mm · Axial FOV 162 mm / 216 mm TrueV
  • 144 detector blocks / 192 TrueV
  • ToF ~540 ps · NECR 96 / 165 kcps · Sensitivity 4.2 / 7.6 cps/kBq
  • 64-slice CT (Sensation 64 lineage) · STRATON tube · 80 kW generator · z-Sharp
  • syngo CT + PET host

Parts

Clinical positioning

  • Premium oncology PET/CT — FDG staging, restaging, response imaging at top-tier image quality for its era.
  • Cardiac PET/CT — diagnostic CT coronary calcium / CTA overlaid with Rb-82 myocardial perfusion PET.
  • Whole-body staging with diagnostic CT — 64-slice CT supports diagnostic-quality CT in a single exam, eliminating separate diagnostic CT workflow.
  • Neuro PET — amyloid, FDG dementia, neuroendocrine.
  • Theranostic imaging — Ga-68 DOTATATE, Ga-68 PSMA workflows.

Market position (secondary / refurb)

  • Large global install base. Biograph 64 is one of the most-traded premium PET/CT platforms in the secondary market, alongside Discovery 690 and Gemini TF.
  • Mature service ecosystem — Siemens OEM service; multi-vendor service coverage on LSO detector and STRATON CT tube.
  • Successor pathway — Biograph mCT (analog ToF with Extended Axial FOV) → Biograph Vision (digital SiPM) → Biograph Vision.X (current flagship).

Relationship to siblings

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