iOnco

Drug Science

Diagnostic Imaging

A complete guide to cancer imaging modalities — from PET-CT and MRI to PSMA PET, DOTATATE, bone scan, mammography, ultrasound, and whole-body MRI. Understand what each scan shows, when it's used, and what to expect.

9

Modalities

5

Categories

3

Radiation-Free

☢️
Nuclear MedicineModerate Radiation

PET-CT Scan

Whole-body metabolic imaging — detects cancer activity by measuring glucose uptake in tissues

strong evidenceTotal 2.5–3.5 hrs (including 60 min uptake period); scan itself 20–30 min
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🖥️
Cross-SectionalLow Radiation

CT Scan (Computed Tomography)

High-resolution cross-sectional X-ray imaging — the workhorse of cancer staging and monitoring

strong evidence5–20 minutes for the scan; 30–60 min appointment with preparation
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🧲
Cross-SectionalNo Radiation

MRI Scan (Magnetic Resonance Imaging)

No radiation — superior soft-tissue detail for brain, spine, liver, prostate, and breast imaging

strong evidence30–90 minutes depending on body area and protocol
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🎯
Nuclear MedicineLow Radiation

PSMA PET Scan

The revolution in prostate cancer imaging — detects recurrence and metastases at extremely low PSA levels

strong evidence2.5–3 hours total appointment; 25–35 min scan
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Nuclear MedicineLow Radiation

DOTATATE PET Scan

Precision imaging for neuroendocrine tumours — maps somatostatin receptors for diagnosis and therapy selection

strong evidence2–3 hours total; 25–30 min scan
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🦴
Nuclear MedicineLow Radiation

Bone Scan (Technetium Scintigraphy)

Whole-skeleton imaging for cancer spread to bone — standard for prostate, breast, and lung cancer staging

strong evidence30–60 min scan; 4–5 hrs total appointment including uptake period
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🩻
Structural ImagingLow Radiation

Mammography & Breast Imaging

The primary tool for breast cancer screening, diagnosis, and surgical planning

strong evidenceMammogram: 20–30 min. Breast MRI: 40–60 min
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〰️
Structural ImagingNo Radiation

Ultrasound in Oncology

Real-time, radiation-free imaging for liver, abdominal, thyroid, and lymph node assessment

strong evidence15–45 minutes depending on area
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🏥
Emerging / AdvancedNo Radiation

Whole-Body MRI

Head-to-toe MRI without radiation — the new gold standard for myeloma and oligometastatic staging

moderate evidence45–90 minutes
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Imaging modality selection should always be guided by your oncologist or radiologist based on your specific cancer type, stage, and clinical question. This content is informational only and not a substitute for specialist medical advice.