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Ultrasound Ultrasound Ultrasound (US) imaging, also called ultrasound scanning or sonography, is a painless, fast, and easy method of “seeing” inside the human body with high-frequency sound waves. The sound waves are recorded and displayed as a real-time visual image. No ionizing radiation is involved in ultrasound scanning. In most ultrasound examinations, a transducer, a lightweight device that produces sound waves is placed on the patient’s skin. There are also special transducers, which can be put into the vagina or rectum to image these areas of the body. Common Uses

• Abdominal organs (liver, gallbladder, spleen, pancreas, kidneys, bladder)
• Pelvic organs (prostate, uterus and ovaries)
• During pregnancy to monitor the development of the embryo or foetus.
• Superficial organs (breast, thyroid, joints)
• Heart
• Blood Flow. Doppler ultrasound is a special technique used to examine blood flow. Doppler images can help to see and evaluate blockages to blood flow, such as clots, and build-up of plaque inside the vessels.
• Biopsy. It can also be used to guide procedures such as needle biopsies, in which a needle is used to sample cells from an organ for laboratory testing.

Preparation

• You should wear comfortable, loose-fitting clothes.
• For gallbladder examination, a fasting period of 4-6 hours is required to visualize your gallbladder, otherwise no fasting is required.
• For pelvic ultrasound, you may be asked to drink up to six glasses of water prior to your exam and avoid urinating, so your bladder is full when the scan begins.

Procedure

• You will lie on your back on an examination table
• A clear gel is applied to your body in the area to be examined, to help the transducer make secure contact with the skin. The sound waves produced by the transducer cannot penetrate air, so the gel helps eliminate air pockets between the transducer and the skin. The gel is water soluble, safe and harmless and can easily be wiped off after the scan with a paper towel.
• The radiographer presses the transducer firmly against the skin and sweeps it back and forth to image the area of interest.
• Transvaginal and trans-rectal ultrasound involves the insertion of a lubricated transducer into the vagina or rectum. The images are obtained from different orientations to get the best views of the uterus and ovaries or the best view of the prostate gland.
• For pelvic ultrasound, it may be done transabdominal or transvaginal to see the uterus and ovaries. Similarly for prostate gland it may be done transabdominal or transrectal.
• When the examination is complete, the gel can be easily cleaned with the use of tissue and you may be asked to dress and wait while the ultrasound images are reviewed.

Benefits and Risks

BENEFITS

• Ultrasound scanning is non-invasive (no needles or injections in most cases) and is usually painless.
• Ultrasound is widely available and easy to use.
• Ultrasound imaging uses no ionising radiation and is the preferred image modality for diagnosis and monitoring of pregnant women and their unborn infants.
• Ultrasound provides real-time imaging, making it a good tool for guiding minimally invasive procedures such as needle biopsies.
• Ultrasound images can visualise structures, movement and live function in the body’s organs and blood vessels.

RISKS

• For standard diagnostic ultrasound, there are no known harmful effects on humans.

Ultrasound is available at:

Radiology Department, Gleneagles Hospital

6A Napier Road Singapore 258500

(65) 6470 5730

Fax: (65) 6470 5749

Radiology Department, Mount Elizabeth Hospital

3 Mount Elizabeth, Level 2 Singapore 228510

(65) 6388 4333

Fax: (65) 6732 3368

Radiology Department, Mount Elizabeth Novena Hospital

38 Irrawaddy Road, Level 2, Singapore 329563

(65) 6388 4333

Fax: (65) 6933 0526

Radiology Department, Parkway East Hospital

321 Joo Chiat Place Singapore 427990

(65) 6388 4333

Fax: (65) 6340 8670

Radiologic Clinic, Mount Elizabeth Medical Centre

3 Mount Elizabeth, #01-01 Mount Elizabeth Medical Centre Singapore 228510

(65) 6731 2727

Fax: (65) 6235 5279

Radiologic Clinic, Paragon

290 Orchard Road #07-04/05/06 Paragon (LobbyE/F) Singapore 238859

(65) 6388 4333

Fax: (65) 6732 5933

Radiologic Clinic, Gleneagles Hospital

6A Napier Road #02-25/26 Gleneagles Hospital Singapore 258500

(65) 6476 1151

Fax: (65) 6471 1151

Radiologic Clinic, Mount Elizabeth Novena Hospital

38 Irrawaddy Road, #01-03/04/05, Singapore 329563

(65) 6388 4333

Fax: (65) 6266 3085

Radiologic Clinic, Republic Plaza

9 Raffles Place, #02-10 Republic Plaza, Singapore 048619

(65) 6371 1588

Fax: (65) 6908 4535

Radiologic Clinic, Jurong East

130 Jurong Gateway Road, #01-219 Singapore 600130

(65) 6569 0300

Fax: (65) 6569 7593

Radiologic Clinic, Bedok

210 New Upper Changi Road, #01-707B Singapore 460210

(65) 6477 0251

Fax: (65) 6477 0254

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