Whole-Body Bone Scintigraphy
Nuclear medicine study for detecting bone turnover, metastases, and fractures.
What is Bone Scan?
Bone scan uses intravenously administered technetium-99m labeled diphosphonate (Tc-99m MDP) as a radiotracer that binds to areas of active bone formation, particularly at sites of osteoblastic activity.
How it works: After injection, the tracer circulates for 2-3 hours before being taken up by bone. A gamma camera then captures images of the entire body, with areas of increased activity appearing as 'hot spots' (bright areas) indicating increased bone turnover.
Common Uses of Bone Scan
Bone metastasis survey
Sensitive for osteoblastic mets (e.g., prostate, breast)
Occult or stress fractures
Detects fractures not visible on X-ray
Infection or hardware loosening
Assesses osteomyelitis or prosthesis issues with 3-phase study
Trauma assessment
Evaluates for occult injuries after trauma
Metabolic bone diseases
Detects paget's disease, metabolic bone disorders
Advantages
- ✓Whole-body coverage in single imaging session
- ✓High sensitivity for bone pathology
- ✓Relatively low cost compared to PET/CT
- ✓No contraindications (except pregnancy)
- ✓Widely available in most hospitals
Limitations
- ⚠Low specificity—requires correlation with CT/MRI
- ⚠Radiation exposure
- ⚠False positives with arthritis/trauma/healing
- ⚠Limited anatomical detail
- ⚠Cannot distinguish metastasis from benign disease
Preparation Checklist
0 of 9 completed
⚖️Bone Scan vs CT
Related Imaging Modalities
Correlate hotspots with CT/MRI; PET-CT may be used for lytic lesions. NaF PET offers superior image quality but is less available.
CT
CT scans use X-rays to create detailed cross-sectional images of the body. They are particularly useful for detecting bone fractures, tumors, and internal bleeding.
MRI
MRI uses powerful magnets and radio waves to produce detailed images of organs and soft tissues. Excellent for brain, spine, and joint imaging.
PET-CT
Combines metabolic imaging with CT anatomy for cancer staging and therapy response.
NaF
PET with NaF for high-sensitivity bone metastasis detection.
Browse Bone Scan Terms
Explore common terms in Bone Scan reports, each with detailed explanations, clinical significance, and related lab tests to help you understand your imaging results. lab tests.
Detailed Stress Fracture Bone Scan: Early Detection and Mana
Three-phase bone scan reveals focal, linear or fusiform area of increased radiotracer uptake at fracture site. Blood flow and blood pool phases show increased activity in acute fractures (within 2-3 weeks). Delayed images demonstrate intense focal uptake at the fracture line, often described as a 'hot spot' following the bone cortex.
Prosthesis Loosening Bone Scan: Evaluating Painful Joint Rep
Focal increased radiotracer uptake at prosthesis-bone interface indicates mechanical loosening. Normal postoperative bone scan shows diffuse decreasing uptake over time. Three-phase positivity (increased blood flow) suggests possible infection rather than aseptic loosening.
Chronic Osteomyelitis Bone Scan: Detecting Persistent Bone I
Variable patterns depending on chronicity. Chronic osteomyelitis often shows focal increased radiotracer uptake on delayed images with variable blood flow. May demonstrate photopenic areas (cold spots) where bone has been destroyed. Three-phase imaging helps distinguish active infection from inactive scar. Combined with labeled WBC imaging, specificity exceeds 90%.
Bone Scan for Cancer Staging: Detecting Skeletal Metastases:
Multiple foci of increased radiotracer uptake ('hot spots') scattered throughout skeleton in random distribution. Classic metastatic pattern involves axial skeleton with relative sparing of distal extremities. May also show diffuse uniformly increased uptake ('superscan') in extensive metastatic burden. Occasionally photopenic (cold) in purely lytic lesions such as multiple myeloma or renal cell carcinoma.
Prosthetic Loosening on Bone Scan: What It Shows, Cost & Pre
Focal increased uptake around prosthesis-bone interface suggests loosening. Normal postoperative pattern shows diffuse, decreasing uptake over time. Increased blood flow suggests infection or recent surgery.
Metastatic Disease on Bone Scan: What It Shows, Cost & Prepa
Multiple foci of increased radiotracer uptake (hot spots) throughout skeleton. Typical pattern includes spine, pelvis, ribs, and proximal extremities. May be photopenic (cold) in purely lytic lesions like multiple myeloma.
Osteomyelitis on Bone Scan: What It Shows, Cost & Preparatio
Focal area of increased radiotracer uptake at infected bone. Three-phase scan shows increased blood flow and blood pool activity in acute phase. May see photopenic area (cold spot) in early infection before bone destruction becomes apparent.
Stress Fracture on Bone Scan: What It Shows, Cost & Preparat
Focal, linear or fusiform area of increased radiotracer uptake at fracture site. Appears as 'hot spot' with characteristic shape following bone cortex. Three-phase bone scan shows increased blood flow and blood pool activity in acute phase.
Explore More Medical Resources
Have a Bone Scan Report?
Upload your imaging report for instant plain-language explanations of terms. WellAlly helps you understand your radiology results.