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Call Diagnostic Imaging at (425) 899-2831

Computed Tomography (CT) Scan

CT (computed tomography) has become so widespread over the last decade that it's now replacing x-ray as the technology of choice.

EvergreenHealth offers the full spectrum of CT imaging for fractures, renal stones, bowel obstruction, Crohn's disease, tumor staging and a host of other uses.

Our three CT scanners provide layered, 3D images of the body, using:

  • High resolution of images for more accurate diagnosis
  • Thin image slices for increased detection of lesions
  • Multiple slice imaging in a single rotation
  • Increased image flexibility, making it possible to layer images for 3D imaging

EvergreenHealth's CT scanners also provide fast scan times. A body scan that used to take three minutes now takes just five seconds.

This technology is also used in angiographic studies, such as blood vessels in the brain, carotids, pulmonary vessels and the aorta. This 15 minute non-invasive procedure replaces an invasive one to two hour procedure that also required a hospital stay. This CT technology offers almost immediate results.

Types of CT Scans

  • Abdominal
  • Orbit
  • Arm
  • Shoulder
  • Thoracic
  • Cranial
  • Leg
  • Sinus
  • Heart
  • Pelvic
  • Knee
  • Lumbar Spine
  • Cervical Spine
  • Lumbosacral Spine

How to Prepare for Your CT

Test: Abdomen - Renal Stone (without IV contrast)

Prep: Nothing by mouth for 4 hours prior to the exam, except for 16oz of water 1 hour prior to the exam.

Test: Abdomen (with IV contrast)

Prep: Nothing by mouth 4 hours prior to the exam. Patients may take any necessary medications in the morning with small sips of water.

Test: Abdomen (without IV contrast)

Prep: Nothing by mouth 4 hours prior to the exam. Patients may take any necessary medications in the morning with small sips of water.

Test: Abdomen (with and without contrast)

Prep: Nothing by mouth 4 hours prior to the exam. Patients may take any necessary medications in the morning with small sips of water.

Test: Bone Biopsy (CT guided)

Prep: Nothing by mouth 8 hours prior to the exam. Patients may take their usual morning medications with small sips of water. Patient also needs Pt and PTT within last 2 weeks of exam.

Test: Calcium Scoring

Prep: None

Test: Cardiac

Prep: Patient will be called by one of our nurses to go over preparation regarding eating, drinking and medications. Nothing by mouth 4 hours before the exam, and no caffeine 12 hours before the exam.

Test: Carotid / Angio

Prep: Nothing by mouth 4 hours prior to the exam. Patients may take any necessary medications in the morning with small sips of water.

Test: Cervical Spine (C-spine)

Prep: None

Test: Chest to Lung Bases (with contrast)

Prep: Nothing by mouth 4 hours prior to the exam. Patients may take any necessary medications in the morning with small sips of water.

Test: Chest Angio

Prep: Nothing by mouth 4 hours prior to the exam. Patients may take any necessary medications in the morning with small sips of water.

Test: Chest (with high resolution, without contrast)

Prep: None

Test: Cystogram

Prep: Nothing by mouth 4 hours prior to the exam

Test: Extremities

Prep: None

Test: Facial Bones - Jaw (without contrast)

Prep: None

Test: Head (with contrast)

Prep: Nothing by mouth 4 hours prior to the exam. Patients may take any necessary medications in the morning with small sips of water.

Test: Head (without contrast)

Prep: None

Children (birth to 4 months): Hold feeding until just prior to appointment time. Parent should bring something to soothe the child (i.e. blanket, etc.)

Test: Circle of Willis Angio

Prep: Nothing by mouth 4 hours prior to the exam. Patients may take any necessary medications in the morning with small sips of water.

Test: IAC or Temporal Bones (without contrast)

Prep: None

Test: Instatrak – Sinus

Prep: None

Test: ICP (CT)

Prep:  Nothing by mouth 4 hours prior to the exam. Patients may take any necessary medications in the morning with small sips of water.

Test: Kidney Biopsy (CT guided)

Prep:  Nothing by mouth 8 hours prior to the exam

Test: Lumbar Spine

Prep: None

Test: Lung Biopsy (CT guided)

Prep: Nothing by mouth 8 hours prior to the exam

Test: Neck – Soft Tissue (with IV contrast)

Prep: Nothing to eat or drink 4 hours prior to the exam; patient may take their medications.

Test: Needle Aspiration

Prep: Nothing by mouth 8 hours prior to the exam

Test: Pancreas Biopsy (CT guided)

Prep: Nothing by mouth 8 hours prior to the exam

Test: Pelvic Biopsy (CT guided)

Prep: Nothing by mouth 8 hours prior to the exam

Test: Pelvimetry

Prep: None

Test: Pelvis (with IV contrast)

Prep: Nothing to eat or drink 4 hours prior to the exam; patient may take their medications.

Test: Pelvis (without IV contrast)

Prep: Nothing by mouth 4 hours prior to the exam

Test: Retroperitoneal Biopsy (CT-guided)

Prep: Nothing by mouth 8 hours prior to the exam

Test: RFA of the Lung (radio frequency ablation)

Prep: Nothing by mouth 8 hours prior to the procedure time; patient may take their medications.

Test: Sinuses

Prep: None

Test: Thoracic Spine (T-Spine)

Prep: None