Bone Scan — how it works, what it shows.

What is a bone scan?

Its great strength is the whole-body survey: a single, inexpensive, widely available test that checks the entire skeleton for problems — most often to look for cancer that has spread to bone.

At Theranostic Physicians, the bone scan is performed in the Department of Nuclear Medicine at Fortis Memorial Research Institute (FMRI), Sector 44, Gurugram, with image interpretation led by Dr. Ishita B. Sen and Dr. Dharmender Malik.

The scan is only as good as who reads it.

A bone scan depends on two things working together: a good machine to acquire a clean study, and a good reader — an experienced nuclear medicine physician — to interpret it correctly. Bone is sensitive but not specific: a bright spot means active bone, not necessarily cancer.

• The institution. Scans are performed at Fortis Memorial Research Institute, Sector 44, Gurugram — a leading tertiary hospital with a dedicated Department of Nuclear Medicine and modern imaging.
• The reader. Every study is interpreted by Dr. Ishita B. Sen and Dr. Dharmender Malik. Telling a metastasis from degenerative change, an old fracture or arthritis — often using added SPECT/CT and your history — is exactly what experience provides.

A scan is only ever as reliable as the equipment that acquires it and the physician who reads it. We hold both to the same standard.

How a bone scan works.

The tracer is a diphosphonate (commonly MDP) labelled with technetium-99m. It works by following the chemistry of bone repair:

• The tracer. Tc-99m MDP is injected into a vein. It travels in the bloodstream and binds to the mineral surface of bone.
• Uptake follows activity. Bone that is actively remodelling — building new bone in response to a tumour, a fracture, infection or arthritis — takes up far more tracer than resting bone, because uptake tracks both blood flow and bone-forming (osteoblastic) activity.
• The wait. Over about two to four hours the tracer fixes to bone and clears from the blood and soft tissue, giving a clean picture. This is why a bone scan has a built-in waiting period.
• Imaging. A gamma camera takes whole-body images; SPECT/CT can be added over a region of interest to pinpoint and characterise a finding.

Who needs a bone scan?

A bone scan is requested by your oncologist, orthopaedic surgeon or physician for a range of questions:

• Cancer that may have spread to bone. The commonest use — surveying the skeleton for metastases in breast, prostate, lung and other cancers, and following them over time.
• Unexplained bone pain. To find a cause when X-rays are normal.
• Fractures that are hard to see — stress fractures and some hidden or insufficiency fractures.
• Bone infection (osteomyelitis) — usually as a three-phase study.
• Paget's disease, arthritis, avascular necrosis and other bone conditions.
• Problems around a joint replacement — helping tell loosening from infection.

What to expect on the day.

A bone scan is straightforward and needs little preparation — but it has a built-in waiting period, so plan for a few hours in total (you can usually leave and return for the imaging).

Out-of-town and international patients are helped with scheduling and logistics.

What a bone scan shows — and how it compares.

The bone scan is highly sensitive — it picks up active bone changes early and across the whole skeleton — but it is not very specific, because many non-cancerous conditions also increase bone activity. That trade-off shapes how it is used.

• Sensitive, whole-body, affordable. Few tests survey the entire skeleton as cheaply and quickly, which is why it remains a first-line tool for bone metastases in many cancers, such as breast.
• Not specific. Arthritis, healed fractures, Paget's disease and degenerative change all light up, so findings are read with your history, X-rays and, where helpful, SPECT/CT.

How it compares

• PSMA PET (prostate cancer). A PSMA PET scan is more sensitive than a bone scan for prostate-cancer bone disease and is increasingly preferred for staging and rising-PSA recurrence.
• FDG PET. An FDG PET/CT detects many bone metastases (particularly lytic disease) as part of whole-body cancer staging.
• NaF PET. An F-18 sodium fluoride (NaF) PET/CT is a higher-resolution PET version of bone imaging used in selected cases.

For how these molecular PET scans differ from anatomical imaging, see PET scan vs CT scan.

Cost of a bone scan in India.

The bone scan is billed by Fortis Memorial Research Institute. The price you pay is the same hospital counter price for everyone — with no commission added for booking through our team.

Is a bone scan safe?

Yes — a bone scan is a very safe, routine test. It is non-invasive apart from a single small injection.

Tracer & radiation

• The Tc-99m tracer is given in a microdose; adverse reactions are rare.
• There is no sedation and no iodinated contrast dye.
• The radiation dose is low. Drinking fluids and emptying the bladder afterwards help clear the tracer, which decays quickly.

Pregnancy & breastfeeding

• Tell the team beforehand if there is any possibility of pregnancy or if you are breastfeeding, so appropriate precautions can be taken.

Book a bone scan.

The bone scan is performed at the Department of Nuclear Medicine, Fortis Memorial Research Institute, Sector 44, Gurugram — the single centre where we deliver scans — with interpretation led by Dr. Ishita B. Sen and Dr. Dharmender Malik. Our team coordinates directly with the department so you skip the phone queues.

Already have a bone scan or other imaging from another centre? You can request an independent expert opinion through our Second Read service without travelling.