Method
Ultrasounds (sonography) are used to examine internal organs, vessels or soft tissues with sound waves and without X-rays.
When are ultrasounds used?
Ultrasound examinations are used to assess the following diseases and organs:
- Neck: thyroid, salivary glands, lymph nodes, soft tissues and vessels.
- Extremities: including muscles and soft tissues, tendons and joints.
- Chest area: mammary gland, fluid retention in the lungs
- Abdominal / pelvic organs: including liver, gallbladder, pancreas, spleen, kidneys, urinary bladder, arteries and veins.
Advantages of Ultrasounds (sonography)
- Ultrasound examinations aren’t invasive. Therefore it is a suitable examination for pregnant women and children.
- There is no radiation exposure.
- They produce real-time images. Therefore the assessment of movement sequences for cardiac actions can be seen.
- Dynamic representation of fluid flows is possible in Doppler sonography.
- Ultrasounds can be done quickly.
- Free cutting in any plane.
Disadvantages of Ultrasounds (sonography)
- There is limited accessibility when overlaying.
- The spatial resolution is lower than what is produced with CT or MRI examinations.
- Weight is a factor as the sound waves are absorbed more, ultimately reducing the penetration depth and thus the ability to assess the particular body part.
Patient information
Things to know before your Ultrasound examination
- When examining abdominal organs, you should not eat, drink or smoke before your examination. Please ask your doctor or examination team about how many hours you should avoid food and drinks before your exam..
- To examine the kidneys and the urinary bladder, it may be necessary to drink a certain amount of fluid beforehand in order to achieve a good filling of the urinary bladder. Please ask your doctor or examination team about this.
- No preparations are necessary for the diagnosis of all other organ regions.
Ultrasound technical details
Ultrasound refers to sound waves in a range inaudible to humans (more than 20,000 oscillations per second, > 20 kHz). Frequencies in the range from 3.5 to 12 MHz are common in sonography.
In simple terms, sonography is the technique and ultrasound is the tool.
Sonography is based on the echo principle: the ultrasound that is radiated into the body. High-frequency sound waves (ultrasound) produce dynamic visual images of organs, tissues or blood flow inside the body.
The echoes are picked up by a transducer, passed on, amplified in the device and made visible on a screen as a curve or as a cross-sectional image.
Everything that is shown in black (dark) is hypoechoic (echo-free) penetrated clearly by the sound waves and is considered to be liquid, e.g. the gallbladder.
Everything that is displayed in white (light) (echo-rich) is not penetrated well by the sound waves. E.g a stone in the gallbladder.
Everything You Need to Know About Ultrasound at Yarra Radiology
If you’ve been referred for an ultrasound, whether it’s an abdominal ultrasound in Melbourne, a pregnancy scan, or are simply searching for a trusted ultrasound near you, Yarra Radiology in South Yarra offers a comprehensive range of ultrasound services. Our experienced imaging specialists help make patients feel at ease during their ultrasound appointment through their knowledge and personable manner.
Frequently asked questions
Yarra Radiology offers a broad range of ultrasound scans in Melbourne to support accurate diagnosis across a wide variety of clinical needs. These include:
- Abdominal ultrasound Melbourne – assessing the liver, gallbladder, pancreas, spleen, kidneys, and urinary bladder
- Pelvic ultrasound – examining the reproductive organs and surrounding structures
- Vascular ultrasound Melbourne – evaluating blood flow through arteries and veins using Doppler technology
- Musculoskeletal ultrasound – imaging muscles, soft tissues, tendons, and joints, commonly used for sports injuries and joint pain
- Neck ultrasound – including thyroid, salivary glands, lymph nodes, and vessels
- Chest ultrasound – assessing mammary glands and detecting fluid retention in the lungs
- Pregnancy ultrasound Melbourne – monitoring foetal development across all stages of pregnancy
With same day ultrasound South Yarra appointments available, patients can access imaging at a time that is convenient for them.
Yes. Pregnancy scans are a key modality that Yarra Radiology provides in Melbourne Ultrasound is the preferred imaging method during pregnancy because it uses sound waves rather than ionising radiation, making it completely safe for both mother and baby.
Pregnancy ultrasounds are so important as they are used to monitor foetal growth and development, confirm gestational age, assess the placenta and amniotic fluid, and screen for potential complications at various stages. From early viability scans to detailed anatomy checks, Yarra Radiology's team provides compassionate and thorough obstetric imaging.
Specialised services such as vascular ultrasound and musculoskeletal ultrasound are also available. Doppler imaging allows dynamic assessment of blood flow in real time, while real-time ultrasound captures soft tissue and joint movement as it happens.
Preparation requirements vary depending on the type of scan being performed:
- Abdominal scans: Patients should avoid eating, drinking, and smoking prior to the examination. Your referring doctor or the Yarra Radiology team will advise you on the specific fasting period required.
- Kidney and bladder scans: A full bladder is often necessary for optimal image quality. You may be asked to drink a set amount of fluid beforehand. Your care team will give clear instructions.
- All other areas: No special preparation is typically required for scans of the neck, limbs, chest, pelvis, or musculoskeletal regions.
If you're unsure what's required for your specific scan, don't hesitate to contact Yarra Radiology ahead of your appointment. Being well-prepared helps ensure the best possible image quality and avoids the need for repeat visits.
An ultrasound examination at Yarra Radiology is a straightforward process. Being a safe, non-invasive procedure, it is one that most people are comfortable with receiving. A transducer, which is a small handheld device, is gently moved across the skin over the area being examined. A water-based gel is placed between the patient’s skin and the transducer to improve sound wave conduction. The result is a clear image captured.
The transducer emits high-frequency sound waves that travel into the body and effectively bounce back as echoes. These echoes are captured and converted into real-time images on a screen. Sonographers are trained to assess organ structure, detect abnormalities, and evaluate blood flow instantly through these ultrasound images.
Ultrasound is a versatile diagnostic tool used across many areas of medicine. The ability to produce real-time, dynamic images makes it particularly valuable for assessing movement, such as how the heart contracts, or how blood flows through a vessel.
Depending on the scan type, ultrasound can assist in diagnosing conditions such as gallstones, kidney disease, liver abnormalities, ovarian cysts, deep vein thrombosis, tendon tears, soft tissue masses, and thyroid nodules, among others. Doppler ultrasound, in particular, enables dynamic assessment of blood flow direction and velocity, making it an essential tool in vascular diagnosis.
For musculoskeletal conditions, ultrasound offers a significant advantage: unlike MRI or CT, it allows practitioners to assess joints and tendons in motion, providing functional insights that static imaging cannot.
Ultrasound is widely regarded as one of the safest medical imaging modalities available. It does not use X-rays or ionising radiation, and there are no known harmful effects associated with diagnostic ultrasound when performed by trained professionals. This is why it is the imaging method of choice for pregnant women and young children.
It's worth noting that ultrasound does have some limitations compared to CT or MRI. Sound waves can be partially blocked by bone, gas, or overlying tissue, which may limit visibility in certain areas. Also, penetration depth can be reduced in some patients, which may affect the clarity of images of deeper structures. In such cases, your radiologist may recommend a complementary imaging study.
At Yarra Radiology, all ultrasound images are reviewed and reported by experienced in-house radiologists. Reports are typically sent to your referring doctor promptly following your examination. In urgent cases, your GP or specialist will receive the results within 24 hours. All other scans may take up to 5 working days to be received by your doctor.
Patients are encouraged to follow up directly with their referring doctor to discuss the results and any recommended next steps. The Yarra Radiology team is also available to answer any administrative queries about your scan or report.
Yarra Radiology is committed to making high-quality imaging accessible to the local community. Yarra Radiology can bulk bill all general ultrasound procedures for clients with a healthcare card or pensioner card, while charging for obstetric and vascular ultrasounds.
To find out whether your specific ultrasound is eligible for bulk billing, we recommend contacting the clinic directly when you book ultrasound appointments. The dedicated team at Yarra Radiology can clarify costs and billing options so there are no surprises on the day.
Quality at Yarra Radiology starts with technology and is reinforced by expertise. The clinic uses modern ultrasound equipment capable of producing high-resolution images.
All examinations are performed and interpreted by qualified sonographers and radiologists with extensive experience in diagnostic imaging. Real-time imaging capability means the team can assess a complete picture of how organs and vessels are performing at the moment of the scan.
From your first ultrasound scan in Melbourne to ongoing monitoring and specialist referrals, Yarra Radiology's team is dedicated to delivering imaging you and your doctor can rely on.
Ready to book? Contact Yarra Radiology in South Yarra today to arrange your ultrasound appointment. Same day bookings are often available. Be sure to contact us for availability.