Can ultrasound detect cancer?
Ultrasound scans can help detect abnormal growths, cysts, or tumours, but they cannot always confirm whether a growth is cancerous.
For example, ultrasound may show a lump or lesion in an organ such as the liver, kidney, or breast, but further tests (for example a biopsy, MRI, or CT scan) are often needed to confirm a diagnosis.
Ultrasound is frequently used as a first line diagnostic tool because it is fast, non invasive, and widely available. It can detect structural changes, monitor growths over time, and guide needle biopsies to collect tissue samples for further testing.
Your consultant will explain whether ultrasound alone is sufficient for diagnosis or whether additional imaging is required.
Can you eat before an ultrasound?
Whether you can eat before your ultrasound depends on the type of scan you’re having:
- Abdominal ultrasound: You’ll usually be asked to avoid eating or drinking for 6 hours before your appointment. This helps reduce gas in the stomach and intestines, which can interfere with image clarity
- Pelvic ultrasound: You may need a full bladder, so you’ll be asked to drink plenty of water before your scan
- Other Types of ultrasound (e.g. thyroid, breast, musculoskeletal): Generally, no fasting is required
Your booking confirmation from Ross Hall Hospital will include specific preparation instructions. If you’re unsure, give us a call and our team will be happy to advise.
Why do you need a full bladder for an ultrasound?
For some pelvic or early pregnancy ultrasounds, you’ll be asked to drink water and keep your bladder full before your appointment.
A full bladder pushes the intestines out of the way and acts as a ‘window' for the sound waves, allowing the sonographer to capture clearer images of the uterus, ovaries, and other pelvic organs.
You’ll usually be asked to drink around one litre of water about an hour before your scan and to avoid emptying your bladder until the scan is complete.
If a transvaginal scan is performed, you may be asked to empty your bladder for comfort and improved accuracy during imaging.
How long does an ultrasound scan take?
Most ultrasound scans take between 15 and 30 minutes, depending on the area being examined.
You’ll lie comfortably on an examination couch while the sonographer applies a small amount of gel to your skin. The gel helps transmit sound waves more effectively.
The transducer is then moved gently over the area of interest to capture images. You may be asked to change position, hold your breath briefly, or shift slightly to improve visibility.
After the scan, the gel is wiped away, and you can return to normal activities immediately. Your results are reviewed by a consultant radiologist, who prepares a detailed report for your referring doctor or consultant.
What does an ultrasound scan show?
Ultrasound scans can show a wide variety of organs and tissues in the body, including:
- Abdomen: liver, gallbladder, kidneys, pancreas, spleen, and major blood vessels
- Pelvis: uterus, ovaries, bladder, prostate, and reproductive organs
- Heart: valves and chambers (echocardiogram)
- Musculoskeletal system: muscles, ligaments, and tendons
- Blood vessels: using Doppler ultrasound to assess blood flow and detect blockages
Ultrasound scans can reveal abnormalities such as cysts, tumours, fluid collections, gallstones, kidney stones, or inflammation. It’s also used to monitor pregnancies, guide biopsies, and assist with certain injections or treatments.
Why would you need an ultrasound after a CT scan?
Your consultant may recommend an ultrasound after a CT scan to further evaluate or monitor specific findings.
While CT scans provide a broad overview of internal structures using X-rays, ultrasound offers real-time imaging and can provide more detail about soft tissue or fluid changes.
Ultrasound is often used for:
- Clarifying uncertain CT results
- Assessing blood flow (with Doppler)
- Guiding needle biopsies or fluid drainage
- Monitoring cysts or lesions over time
Because ultrasound does not use radiation, it’s a safe, complementary imaging method for ongoing assessment.
Why choose Ross Hall Hospital for your ultrasound in Glasgow?
Patients choose Ross Hall Hospital for diagnostic imaging because of our combination of advanced technology, experienced consultants, and patient focused care.
As part of Circle Health Group, Ross Hall provides:
- Highly trained radiologists and sonographers – experienced in complex ultrasound imaging
- Fast access to appointments – often available within days
- Modern ultrasound and diagnostic equipment – for high-resolution, accurate results
- Comfortable, private setting – designed to put you at ease throughout your visit
- Comprehensive medical network – seamless referral to specialists if further treatment is needed
- Transparent pricing and flexible payment options – so you know exactly what to expect
From booking to results, our friendly team ensures your experience is smooth, professional, and reassuring.
How to book an ultrasound scan in Glasgow
To book an ultrasound scan at Ross Hall Hospital, you will need a referral from a GP or other healthcare professional. Whether you are a private or NHS patient, your GP can refer you to our hospital to have your ultrasound. We will then send the results back to your GP.
If you are already a patient at Ross Hall and you need an ultrasound, your consultant will refer you to our imaging team to arrange the scan.
If you don’t have a referral but believe you need an ultrasound scan, it’s important to speak to a specialist first. Call or book online to make an appointment with a relevant consultant near you, and they will be able to discuss your conditions and, if appropriate, refer you for an ultrasound scan.