CT

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CT scan is a sophisticated imaging tool utilizing x-rays and powerful computers to generate cross-sectional images of the body. CT scans are used to diagnosis wide range of diseases from head to toe. Spiral CT was introduced in the 1990's, which enable much faster and accurate scanning capabilities. Main Street Radiology installed the first 16-detector spiral CT in Queens, with the ability to scan up to 16 times faster than a traditional spiral CT.

About the Procedure

Depending on the type of scan requested by the referring physician, a patient may receive oral and/or intravenous (IV) contrast. Oral contrast is used to outline the stomach and intestines during the exam, and is given as a flavored drink approximately one hour prior to the actual scan. IV contrast is an iodine-based liquid injected into the vein during the scan to highlight organs of the body.

The patient lies on a table that automatically moves the patient's body through a "donut" shaped tube, where a thin beam of x-rays is generated to produce high-resolution cross-sectional images of the body. The actual scanning time is usually less than 30 seconds with a 16-detector spiral CT. The patient may be asked to hold his/her breath during the scan, so that body part being imaged does not move during the scan acquisition.

Preparation for Procedure

To prepare for a CT scan, we ask that you follow the following guidelines:

  • Please do not wear any item that is metal – including watches, hair pins, hearing aids, eyeglasses and jewelry. Please also do not wear any clothing that does not contain metal buttons, snaps or zippers.
  • If you are, or think you may be pregnant please let us know as a CT scan is not generally performed on pregnant women.

CT Scan with Contrast

  • Refrain from eating AND drinking 4 hours prior to your exam.
  • If you are diabetic, please stop taking the following medications 6 hours before your exam AND resume 48 hours after the exam. If you are not taking any of the medications listed below, you may take your medication with a small amount of water.
    • Glucophage
    • Metformin
    • Glucovance
    • Metaglip
    • Avandament
    • Fortamet
    • Glumetza
    • Diaformin
    • Riomet
    • Diabex
    • Actoplus
    • Janumet
  • If you are diabetic we will need your most current blood work; no more than 3 months old. We will also need your BUN and Creatinine levels.
  • If you are not diabetic, please follow the first step.
  • On the day of your appointment, please come in with your doctor’s prescription, insurance card and a picture ID.
  • Complete the CAT Scan Questionnaire
  • The following meds contain Metformin and can’t be taken for 6 hours before CT and 48 hours after CT with contrast:
    • Glucophage
    • Fortamet
    • Glumetza
    • Glucovance (Glyburide & Metformin)
    • Diabex
    • Diaformin
    • Riomet
    • Avandamet
    • Metaglip (Glipizide & Metformin)
    • Actoplus
    • Janumet (not Januvia)

CT Scan without Contrast

  • Refrain from eating AND drinking 4 hours prior to your exam.
  • On the day of your appointment, please come in with your doctor’s prescription, insurance card and a picture ID.
  • Complete the CAT Scan Questionnaire
  • The following meds contain Metformin and can’t be taken for 6 hours before CT and 48 hours after CT without contrast:
    • Glucophage
    • Fortamet
    • Glumetza
    • Glucovance (Glyburide & Metformin)
    • Diabex
    • Diaformin
    • Riomet
    • Avandamet
    • Metaglip (Glipizide & Metformin)
    • Actoplus
    • Janumet (not Januvia)

What to bring and wear:

  • Bring any previous CT scans with you.
  • Bring your insurance cards, prescription and photo ID.
  • Comfortable clothing should be worn. You may be asked to change into a hospital gown for certain types of CT scans.

Arrive on time:

  • You should arrive at least 15 minutes before your scheduled appointment time.
  • If you must cancel or reschedule, you need to do so at least 24 hours before your appointment.

Your CT Scan:

  • If you are having a contrast CT, you will be given consent forms to sign.
  • When images are being taken, you will be asked to remain motionless and hold your breath. Acquiring each image typically takes about 20 seconds.
  • If you are having a CT of the head, sinuses, or throat, your head may be immobilized during the scan in order to hold it in place to ensure accuracy.
  • Depending on the type of CT scan, the procedure can take approximately 10 to 45 minutes.
  • You can resume your normal diet and activities after the scan.

If you have any questions regarding your exam please give us a call at (718) 428-1500.

Specialized Procedures

At Main Street Radiology, we perform sophisticated CT exams not performed at most imaging centers. These include: