systemSiemensPET CTfamily: biograph-truepoint

Siemens Biograph 16 (TruePoint / TrueV)

Family: Siemens Biograph TruePoint · Modality: PET/CT

Mid-range PET/CT in Siemens' pre-mCT Biograph family. Biograph 16 pairs a 16-slice CT (shared lineage with SOMATOM Sensation / Emotion-class CT chassis of the era) with the Biograph's LSO-crystal PET detector system. Commonly deployed across community oncology and mid-volume hospital nuclear-medicine / PET departments through the late 2000s and early 2010s. The TrueV option extends the axial PET FOV from 162 mm to 216 mm, adding 48 crystal blocks and materially improving sensitivity.

PET detector architecture

  • LSO (Lutetium Oxyorthosilicate) crystals — the Biograph family was an early adopter of LSO over BGO; the faster scintillation decay enabled ToF-capable reconstruction on later Biograph mCT / Vision platforms.
  • Crystal dimensions — 4.0 × 4.0 × 20 mm.
  • 169 crystals per detector block.
  • 144 detector blocks on the base configuration; 192 blocks with TrueV.
  • Transaxial FOV 605 mm.
  • Axial FOV — 162 mm base / 216 mm with TrueV.
  • 81 image planes base / 109 with TrueV.
  • ToF performance ~540 ps on ToF-capable revisions (contrast Biograph mCT ~527 ps, Biograph Vision ~214 ps — Vision.X ~178 ps).

PET performance envelope

  • 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 lower energy threshold — narrower than contemporary BGO systems, enabled by LSO's higher energy resolution.

CT side

  • 16-slice CT — LightSpeed-era class of 16-slice capability; shares mechanical and software lineage with SOMATOM Sensation 16 / Definition AS era Siemens CT.
  • STRATON tube family on most 16-slice Biograph configurations — liquid-metal-bearing rotating anode.
  • syngo.via or earlier syngo CT host software.

Specs

  • 16-slice CT · LSO PET (4.0 × 4.0 × 20 mm crystals)
  • Transaxial FOV 605 mm · Axial FOV 162 mm (216 TrueV)
  • 144 detector blocks (192 TrueV) · 169 crystals/block
  • NECR peak 96 kcps base / 165 kcps TrueV
  • Sensitivity 4.2 cps/kBq base / 7.6 cps/kBq TrueV
  • ToF-capable revisions: ~540 ps
  • syngo CT host

Clinical positioning

  • Community oncology PET/CT — FDG staging, restaging, treatment-response imaging.
  • Mid-volume hospital nuclear-medicine / PET — the workhorse tier Biograph 16 was designed for.
  • Cardiac rubidium (Rb-82) — supported with Rb-82 generator workflow.
  • Neuro PET — amyloid, FDG dementia, neuroendocrine.

Market position (secondary / refurb)

  • Large global install base. Biograph 16 is among the most common Siemens PET/CT platforms in the secondary market alongside Biograph 64 and Biograph mCT.
  • Mature service ecosystem — Siemens OEM service; multi-vendor service coverage on LSO detector blocks and STRATON CT tubes.
  • Successor pathway — Biograph mCT (analog ToF) → Biograph Vision (digital SiPM) → Biograph Vision.X (current).

Relationship to siblings

  • Biograph Duo — 2-slice predecessor-class.
  • Biograph 40 — 40-slice sibling in the TruePoint family (System Card planned).
  • Biograph 64 — 64-slice flagship sibling in the TruePoint family (System Card planned).
  • Biograph mCT — direct successor generation.

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