Dharamshila Narayana Superspeciality Hospital

Patient Helpline 186-0208-0208

International Patient +91-7290084245

Mail Us info.dnsh@narayanahealth.org

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Instructions for Preparation Prior to the Imaging Tests

  • Conventional Radiology and CT Scans are anatomical and morphologic scans.
    • No preparation is required for Dexa Scan, X-ray of the Chest and Limbs.
  • Ultrasound, Echo and Colour Doppler studies are morphologic and real time scans which show movements and colour flows of blood and organ system.
  • MRI, Nuclear and PET Scans: in addition to being anatomical, metabolic and functional studies with the ability for response evaluation, wherever required.
  • You should choose the scan according to the disease and display of anatomy, function and response, you wish to investigate and prognosticate.
  • We would be happy to guide you in the correct choice if you call the department at Tel no. 01143066576 Ext. 575

Barium Enema:

  • Take tablets Dulcolux and Charcoal at night for evacuation of bowel and come empty stomach in the morning.
  • Take light diet for three days before the test.
  • Do not eat or drink anything for 12 hours before the test.
  • The test will be performed after simple enema in the morning.

Bariums Swallow:

  • Patient should come empty stomach in the morning if a Barium meal is to be done.
  • For Barium Swallow you need not be empty Stomach.
  • For Contrast Tests, Urea and Creatinine reports are required
  • For Biopsy : BT, CT, PT with INR reports are required.

Ultrasound Scans:

  • Ultrasound Upper Abdomen:
    • Patient should come empty stomach in the morning or must be empty stomach for at least last 4 – 5 hours during the day.
  • Ultrasound Lower Abdomen: Patient can have breakfast
    • Patient should drink 1 /2 – 1 litre of water, hold urine and report when the bladder is full.
    • Do not empty the bladder, unless asked by the doctor.
  • Ultrasound whole abdomen
    • Patient should come empty stomach in the morning or should be empty stomach for at least last 4 – 5 hours. Patient should drink ½ - 1 litre of water and hold the urine and report when the bladder is full.
  • Ultrasound Small Parts: No preparation is required for Breast, Thyroid, Scotum.
  • Musculoskeletal scans - No preparation is required.
  • Transcavitary scans - TVS & TRS- require no preparation.

CT Scans:

  • Patient should not be allergic to contrast media.
  • If allergic choose MRI scans.
  • Recent blood test report of Urea & Creatinine should be available.
  • Patient should be empty stomach, preferably over night.
  • If breakfast has been taken, then 4-5 hours should lapse before the study can be started and I.V. contrast, administered.
  • Oral contrast media is to be taken by patient every 10 minutes, 150 – 200 ml at a time till 1250 ml is consumed.
  • I.V. contrast media, according to the protocol will be administered.
  • Rectal contrast media will be administered in all pelvic examinations.
  • No contrast media is required for HRCT Chest, Spine, PNS, orbits.
  • The study will take 1 hour- 1 ½ hours
  • All old and previous imaging studies should be available with the patient so that studies can be tailored and correct assessment made.

MRI Scans:

  • Patient should remain empty stomach for 6 hours before the appointment time, if you are undergoing an Abdomen or Pelvic scan or contrast study. For all other scans, no fasting is required. Children can be individually assessed by the radiologist for fasting time.
  • Recent blood reports of blood Urea and Creatinine should be available.
  • Height and weight to be documented on the form to decide dosage if necessary.
  • Wear cotton clothes with no embellishments, pins or hooks.
  • Wear no jewellery or wrist watch.
  • Wear no pins in your hair
  • Take off your dentures and leave them at home.
  • Do not bring your mobile phone or keys with you.
  • Remove any trans-dermal pain relief patches.
  • You will be physically and electronically checked before you enter zone III of MRI suite.
  • If you are claustrophobic you will need sedation.
  • The machine working makes a pounding noise. You will be provided with ear plugs to decrease the noise.
  • The study will take 1 – 1/2 hour.

PET Scans:

  • Avoid heavy exercise starting the day before your test
  • Have a normal dinner at right (8 – 12 p.m.)
  • Recent Blood sugar random report should be available because glucose status is mandatory to fix your appointment.
  • Remove all jewellery (chain, bangles, ear rings, nose pins) and leave it at home.
  • Bring with you all actual films, CD’s and reports of all previous diagnostic tests (MRI, CT, X-Ray and PET CT Scan) done at any facility.
  • Do not bring children or pregnant women with you.

Non Diabetics:

  • Drink plenty of water, being well hydrated is important. You should not have any sugary food or drinks e.g. avoid fruit, fruit juices, cold drinks, candy and desserts etc. Have no food or any other sugary drink for 6 hour before your appointment time.
  • Do not smoke for at least 24 hours and do not drink coffee / tea for at least 12 hours before scan.
  • If you have prescription medicine to take before your scan, take it only with plain water :


  • Your scan will be scheduled for the middle of the day. Have a light breakfast with your normal diabetic medicine in the morning. During the 4 hours before your appointment time, do not have anything else except water, not even insulin. Diabetics must bring their insulin or pills (medicine).
  • Dress in warm, comfortable cotton clothes, such as sweat pants and sweat shirt because the scan room has to be kept cool(18-22 degrees centigrade). You will not need to undress for the test.

Study procedure

  • You must arrive ½ hour before your appointed time at the radiology and imaging front desk. You will be escorted to PET CT suite and your history will be taken.
  • A nurse/ technician will place a small IV cannula in your arm.
  • You will be escorted to a room where you will be given a prescribed amount of a radioactive tracer (medicine) for the scan. You will rest for about 45-60 minutes while the medicine travels through your body. During this time DO NOT talk, read or move unless you want to go to the bathroom or there is an emergency. During the resting period you will be under electronic surveillance by the medical staff.
  • You will then be escorted to the PET-CT Scanner room. The actual scan will take less than one hour.
  • After the doctor checks the scan, you may leave and continue with your regular activities.
  • Total time spent in the PET- CT Suite will be approximately 2 ½ hours

Non vascular interventional radiology

Procedures are parformed by appointment. Blood reports of BT,CT, PT with INR, platelet count and APTT should be available. All imaging studies performed should be available to avoid repeats. Studies will be done guided by US or CT as deemed necessary.

The following interventions are performed:-

  • RFA (Radio Frequency Ablation)
  • FNAC
  • Biopsies
  • Catheter insertions
  • Stenting procedures
  • Gold marker insertions
  • Tube insertions
  • Central Line Insertions

Specimens are sent to the lab for histopathology, cytology, direct smear or culture requirements. Reports are available from the lab

    • Patient must come with empty stomach for last 6 - 7 hours.
    • Blood Tests required: Blood Sugar Random, Urea, Creatinine
    • Previous Report / Films required for Comparison.
    • Blood Tests required: B.T. (Bleeding Time), CT (Clotting Time), PT (Prothrombin Time) with INR
    • Associated Imaging Films and Reports required for locating the area.

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Call 186-0208-0208
Mon–Sat 9:00 AM to 6:00 PM IST

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