ULTRASOUND

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Ultrasound scan: is a medical test that uses high-frequency sound waves to capture live images from the inside of your body. … An ultrasound allows your doctor to see problems with organs, vessels, and tissues without needing to make an incision. Unlike other imaging techniques, ultrasound uses no radiation.

Ultrasound is safe and painless and produces pictures of the inside of the body using sound waves. Ultrasound imaging, also called ultrasound scanning or sonography, involves the use of a small transducer (probe) and ultrasound gel placed directly on the skin. Ultrasound examinations do not use ionizing radiation (as used in x-rays), thus there is no radiation exposure to the patient. Because ultrasound images are captured in real-time, they can show the structure and movement of the body’s internal organs, as well as blood flowing through blood vessels.

Diagnostic ultrasound, also called sonography or diagnostic medical sonography, is an imaging method that uses high-frequency sound waves to produce images of structures within your body. The images can provide valuable information for diagnosing and treating a variety of diseases and conditions.

Most ultrasound examinations are done using an ultrasound device outside your body, though some involve placing a device inside your body.

 

Why it’s done

Ultrasound is used for many reasons, including to:

  • View the uterus and ovaries during pregnancy and monitor the developing baby’s health

  • Diagnose gallbladder disease

  • Evaluate blood flow

  • Guide a needle for biopsy or tumor treatment

  • Examine a breast lump

  • Check your thyroid gland

  • Detect genital and prostate problems

  • Assess joint inflammation (sinusitis)

  • Evaluate metabolic bone disease

How you prepare

Most ultrasound exams require no preparation. However, there are a few exceptions:

  • For some scans, such as a gallbladder ultrasound, your doctor may ask that you not eat or drink for up to six hours before the exam.

  • Others, such as a pelvic ultrasound, may require a full bladder. You may need to drink up to six glasses of water two hours before the exam and not urinate until the exam is completed.

  • Young children may need additional preparation. When scheduling an ultrasound for yourself or your child, ask your doctor if there are any specific instructions you’ll need to follow.

AUDIOMETRY: evaluation is a painless, noninvasive hearing test that measures a person’s ability to hear different sounds, pitches, or frequencies. Patients who have a tumor in or around the ear may undergo audiometry testing to determine whether a hearing loss has occurred or to monitor their hearing before and after surgery. It is also used to evaluate whether hearing aids or surgery may improve one’s hearing.