Your doctor has recommended an ultrasound, or you are adding one to your health screening. Either way, you may not be sure what the scan involves, why a particular type has been requested, or what to expect during the appointment. Ultrasound is one of the most versatile and commonly used diagnostic tools available — and understanding the different types helps you approach the process with confidence.
Key Takeaways
- Ultrasound is a non-invasive, radiation-free imaging technique that uses sound waves to visualise soft tissue organs and structures in real time
- Common types include upper abdominal (liver, gallbladder, pancreas, spleen), kidney and bladder (KUB), breast, thyroid, transvaginal (uterus and ovaries), scrotal, carotid, and pregnancy scans
- Fasting for 8 hours is required before upper abdominal and hepatobiliary scans — other scan types typically do not require fasting
- Most ultrasound appointments take 30–60 minutes and results can often be discussed immediately after
- Ultrasound is safe for all age groups and is the standard imaging tool for pregnancy, gynaecological assessment, and abdominal organ screening
- Klinik Len Seng in Cheras, KL can advise on which type of ultrasound is appropriate for your health concern as part of our health screening services
Ultrasound scans are among the most frequently requested investigations in both general practice and specialist settings across Malaysia. They are painless, involve no radiation, and provide real-time images of the body’s internal structures — making them invaluable for everything from routine pregnancy monitoring to the investigation of abdominal discomfort or a palpable lump.
What Is an Ultrasound Scan?
An ultrasound scan — also known as sonography — uses high-frequency sound waves to produce images of structures inside the body. A transducer (a small handheld device) emits sound waves and detects the echoes that bounce back from different tissues. These echoes are processed into real-time images displayed on a screen.
Because ultrasound does not use ionising radiation (unlike X-rays or CT scans), it is considered safe for all patient groups — including pregnant women, children, and those requiring frequent monitoring over time. It is particularly effective at visualising soft tissue structures, fluid-filled organs, and blood flow.
Types of Ultrasound Scans Available in Malaysia
1. Upper Abdominal Ultrasound (Hepatobiliary Scan)
An upper abdominal ultrasound examines the liver, gallbladder, bile ducts, pancreas, spleen, and surrounding structures. It is one of the most commonly requested scans in health screening and general practice.
What it detects: Fatty liver disease, liver cysts or tumours, gallstones, bile duct obstruction, pancreatitis, spleen enlargement, and portal hypertension.
Who should consider it: Individuals with elevated liver enzymes on blood tests, right upper abdominal pain, known hepatitis B or C, alcohol-related liver risk, or as part of a comprehensive health screen from age 40 onwards.
Preparation: Fasting for 8 hours is required to reduce bowel gas and ensure the gallbladder is adequately distended for imaging.
2. Kidney and Bladder Ultrasound (KUB)
A KUB ultrasound examines both kidneys and the urinary bladder. It assesses organ size, structure, and the presence of abnormalities in the urinary tract.
What it detects: Kidney stones, cysts, hydronephrosis (fluid-filled kidney from obstruction), tumours, bladder thickening, and residual urine post-voiding.
Who should consider it: Those with blood in the urine, recurrent urinary tract infections, flank pain, elevated creatinine on blood tests, or a history of kidney stones.
Preparation: A full bladder is required for bladder assessment — drink plenty of water 1 hour before the appointment and do not urinate beforehand.
3. Breast Ultrasound
A breast ultrasound is used to further evaluate findings from a mammogram or clinical breast examination, or as the primary imaging tool in younger women with denser breast tissue where mammography is less effective.
What it detects: Breast cysts (fluid-filled sacs, usually benign), solid lumps or masses requiring further evaluation, lymph node enlargement, and post-surgical changes.
Who should consider it: Women who have identified a lump or thickening during self-examination; those with abnormal mammogram findings; women under 35 or with dense breast tissue; anyone with nipple discharge or breast pain warranting investigation.
Note: Breast ultrasound complements mammography but does not replace it. In women over 40, both are often used together for the most complete assessment.
4. Thyroid Ultrasound
A thyroid ultrasound evaluates the thyroid gland — the butterfly-shaped structure at the front of the neck — for size, texture, and the presence of nodules or cysts.
What it detects: Thyroid nodules (very common, mostly benign), goitre (enlarged thyroid), thyroid cysts, calcifications, and features that may indicate a need for biopsy.
Who should consider it: Individuals with a visible or palpable neck lump; those with abnormal thyroid function tests (TSH, Free T4); patients with a family history of thyroid cancer; and anyone with symptoms of thyroid dysfunction including unexplained weight changes, fatigue, or neck discomfort.
5. Transvaginal Ultrasound (TVS)
A transvaginal ultrasound uses a thin transducer inserted into the vagina to produce close-up images of the uterus, endometrium (uterine lining), fallopian tubes, and ovaries.
What it detects: Uterine fibroids, ovarian cysts, polycystic ovary syndrome (PCOS), endometrial polyps, early pregnancy, ectopic pregnancy, and ovarian tumours.
Who should consider it: Women with irregular periods, suspected PCOS, pelvic pain, abnormal uterine bleeding, or during early pregnancy assessment. It is also a standard component of fertility investigations.
This scan is offered as part of women’s health services at Klinik Len Seng and is conducted with full privacy and care.
6. Carotid Ultrasound
A carotid ultrasound examines the carotid arteries — the main blood vessels supplying the brain — for plaque build-up (atherosclerosis) and blood flow irregularities.
What it detects: Carotid artery stenosis (narrowing), atherosclerotic plaque, increased intima-media thickness (an early marker of cardiovascular risk), and reduced blood flow that may indicate stroke risk.
Who should consider it: Men over 55 and women over 60 with cardiovascular risk factors (hypertension, diabetes, high cholesterol, smoking); individuals with a history of mini-strokes (TIA); or those undergoing an executive cardiac health screen.
7. Scrotal Ultrasound
A scrotal ultrasound evaluates the testes, epididymis, and surrounding structures for abnormalities.
What it detects: Testicular cysts, varicoceles (enlarged veins), hydroceles (fluid collections), epididymitis (inflammation), and testicular masses that may warrant further investigation.
Who should consider it: Men with scrotal pain, swelling, or a palpable lump. It is the first-line investigation for suspected testicular conditions. Available as part of men’s health services at Klinik Len Seng.
8. Pregnancy Ultrasound
Ultrasound is the primary imaging tool used throughout pregnancy in Malaysia. Different scans are performed at different stages of pregnancy, each with a specific purpose:
- Dating scan (6–12 weeks) — confirms gestational age, viability, and number of foetuses
- Nuchal translucency scan (11–14 weeks) — assesses the risk of Down syndrome and other chromosomal conditions
- Anatomy scan (18–22 weeks) — detailed assessment of foetal anatomy, organs, and structures; gender determination is possible
- Growth scan (28 weeks onwards) — monitors foetal growth, amniotic fluid level, and placental position
- 4D/5D scans — advanced imaging that produces three-dimensional real-time visualisation of the foetus, popular as a keepsake scan alongside clinical assessment
Ultrasound Scan Quick Reference
Scan Type | Organs Assessed | Fasting Required? | Who Needs It |
|---|---|---|---|
Upper Abdominal | Liver, gallbladder, pancreas, spleen | Yes (8 hours) | Abdominal symptoms, elevated liver enzymes, Hep B |
KUB (Kidney & Bladder) | Kidneys, bladder | No (full bladder needed) | Blood in urine, kidney stones, recurrent UTIs |
Breast | Breast tissue, lymph nodes | No | Lumps, dense breasts, abnormal mammogram |
Thyroid | Thyroid gland | No | Neck lump, abnormal thyroid blood tests |
Transvaginal (TVS) | Uterus, ovaries | No (empty bladder) | Irregular periods, PCOS, pelvic pain |
Carotid | Carotid arteries | No | Cardiovascular risk, stroke history |
Scrotal | Testes, epididymis | No | Scrotal pain or lump |
Pregnancy | Foetus, placenta, amniotic fluid | No | All pregnant women at appropriate gestational stages |
What to Expect During an Ultrasound Appointment
Most ultrasound scans follow a similar format:
- Preparation — you may be asked to change into a gown for easier access to the area being scanned
- Positioning — you lie on an examination table, typically on your back. For some scans (e.g. kidney), you may be asked to turn on your side
- Gel application — a water-based gel is applied to the skin (or the transducer for internal scans) to improve sound wave transmission
- Scanning — the sonographer or doctor moves the transducer over the skin, capturing images in real time on the screen
- Duration — most scans take 20–45 minutes depending on the complexity and number of structures assessed
- Results — preliminary findings may be discussed immediately; a formal radiologist report typically follows within 24–48 hours
The scan is painless. There is no radiation exposure, no needles, and no recovery time required. You can resume normal activities immediately after the appointment.
Ultrasound as Part of Your Health Screening at Klinik Len Seng
At Klinik Len Seng, ultrasound investigations can be arranged as part of your comprehensive health screening, in conjunction with a women’s health or men’s health consultation, or as a standalone investigation based on clinical assessment. Our doctors can advise on which scan is most appropriate for your specific concern and help you understand what your results mean.
If you are bringing a child for assessment, our paediatric services include clinical examination and, where indicated, referral for appropriate paediatric imaging.
Frequently Asked Questions About Ultrasound Scans in Malaysia
Is an ultrasound scan safe?
Yes — ultrasound uses sound waves, not ionising radiation. It has been used safely in medical practice for decades, including throughout pregnancy. There are no known risks associated with diagnostic ultrasound.
Do I need a doctor's referral for an ultrasound?
In most cases, a GP or specialist referral is needed, as the doctor’s clinical assessment determines which type of scan is most appropriate. Some private ultrasound centres offer direct-access scanning without a referral, but results should still be reviewed by a doctor to be clinically meaningful.
Can an ultrasound detect cancer?
Ultrasound can identify masses, cysts, and abnormal structures that may warrant further investigation. It cannot definitively diagnose cancer — a biopsy is required for tissue diagnosis. However, ultrasound findings can indicate whether a mass is suspicious and help guide decisions about next steps.
How long does it take to get ultrasound results?
Preliminary findings may be discussed immediately after the scan. A formal written report from a radiologist typically takes 24–48 hours. Your referring doctor will review the report with you and advise on next steps.
What is the difference between a 2D, 3D, and 4D pregnancy scan?
A 2D scan provides flat cross-sectional images and is the standard clinical tool used for all routine pregnancy assessments. A 3D scan produces a static three-dimensional image of the foetus. A 4D scan adds live video movement to the 3D image, allowing you to observe the baby in motion. Clinical decisions are made based on 2D findings; 3D/4D scans are typically offered as an additional experience.
Finding a Family Care Clinic in Malaysia
If you have been advised to have an ultrasound, or if you would like to include one in your health screening, reach out to Klinik Len Seng today. WhatsApp us at +6012-565 1280 and our team will guide you on the right scan for your situation — clearly, promptly, and without unnecessary waiting.
Klinik Len Seng — Your trusted family health clinic in Cheras, Kuala Lumpur, providing professional medical guidance and comprehensive health investigations for the whole family.
