CT Scans
NEW YORK, NY 10065

CT Scans

A CT scan allows our radiologists to evaluate almost any part of the body with extreme precision. As one of the first radiology offices in NYC to install the latest generation of CT scanners, Park Avenue Radiologists has the experience as well as the technology to achieve the highest quality noninvasive medical imaging.

What is a CT scan?

CT stands for computed tomography or CAT for Computerized Axial Tomography. CT Scans are used to study and diagnose conditions in virtually every part of the body. Many conditions can be ruled out as a result of a CT scan allowing patients to avoid surgery and other invasive medical treatments. Park Avenue Radiologists continues to install the latest multidetector CT technology on an ongoing basis to provide the highest quality CT scans with advanced applications for angiography, cardiac studies, virtual colonoscopy, and other 3D applications.

  • CT Scan Overview
  • As with all radiological procedures patients should inform the technologist if there is any chance of pregnancy or if you are nursing
  • For most studies, patients need not even undress. Most exams take less than thirty minutes
  • Studies with contrast require the patient to fast for three hours prior to the test. Do not eat or drink three hours before your appointment
  • Studies of the abdomen and pelvis with contrast require patients to drink oral contrast after they arrive at the office for their appointment
  • You will be asked to complete a detailed questionnaire regarding your medical history and the reason your doctor scheduled your appointment
  • If you have had a severe allergic reaction (food or medicine) in the past, have asthma or a prior reaction to a contrast material during previous CT scan or X-ray please advise the office at the time of scheduling

A low dose CT scan is an X-ray that produces computer images of a particular body part and helps diagnose conditions a regular X-Ray cannot. The dose of radiation used during a low dose CT scan is equivalent to natural radiation absorption over a six month period. During a CT scan, the patient lies on the table while an X-ray tube rotates around the body. A computer program is then used to project images on a monitor. The images, which show a cross-section of body tissues and organs, are then studied by the radiologist.

Computed tomography is a noninvasive diagnostic imaging technique that, like traditional X-rays, produces multiple images of the inside of your body. However, CT technology produces cross-sectional images of your anatomy. These images are often referred to as slices. These slices allow the radiologist and your physician to see a more comprehensive evaluation of your anatomy.

At Park Avenue Radiologists, we use the Siemens Somatom Perspective CT scanner, which is specifically designed to provide our patients with the quickest and most accurate CT scan. The Somatom CT scanner is one of the most technologically advanced noninvasive imaging tools that are currently available.

  • Benefits of the Somatom CT scanner include
  • Greater image clarity
  • Reduced amounts of radiation needed compared to traditional CT scans
  • Patient-friendly design allows for easy access and positioning
  • Quicker exams that are more comfortable
  • Improved imaging of the heart, arteries, and more
  • Improved CT angiography and CT cerebral perfusion imaging services
  • Reduces the need for additional CT scans or rescanning


The National Lung Screening Trial (NLST) in the United States has been stopped after eight year results showed that screening heavy smokers with low-dose helical computed tomography (CT) significantly reduced deaths from lung cancer, compared with screening with chest X-rays. The trial has involved more than fifty-three thousand current and former heavy smokers fifty-five to seventy-four years of age. Individuals were randomized to undergo screening annually for three years with either CT or chest X-rays, and were then followed for another five years. READ MORE


Cancer Risk Overestimated With Radiation From CT Scans: Although it has risen slightly in recent years, the risk of developing cancer from a computed tomography (CT) scan is still lower than was previously thought. Within a year or two — the amount of radiation delivered by a CT scan will decrease ten to one hundred fold. READ MORE

What can I expect from a CT scan?

During a CAT scan, the patient will be asked to lie down on the examination table. For certain CT scans, the technician may ask you to hold your breath for a short period. As with all radiological procedures, you should inform our radiologists if there is any chance of pregnancy or if you are nursing. Some CT studies with contrast require the patient to fast for three hours prior to the CAT scan. CT scans of the abdomen and pelvis with contrast require patients to drink oral contrast after they arrive at the office for their appointment.

If you have had a severe allergic reaction to food or medicine in the past, have asthma, or have had a prior reaction to a contrast material during previous CT scans or X-rays, please advise the office at the time of scheduling. We also ask that you please alert our staff if you have any renal or kidney problems. You will be asked to complete a detailed questionnaire regarding your medical history and the reason your doctor scheduled your CT scan appointment.

What can a CT scan help diagnose?

A CAT scan is a quick medical imaging test that can help diagnose a variety of symptoms and diseases. CT scans can also be used as a form of preventive medicine. Routine CT scans to check for issues such as lung cancer, colon cancer, or heart disorders can ensure your well-being. These preventive CT scans can also be the first to detect any abnormalities or irregularities in your health. At Park Avenue Radiologists, we offer CT dental scans, preventive CT scans, abdomen and pelvic CT scans, CT arthrography, and CT sinus scans.

CT Dental Scans

Before implant surgery, a dental scan is required to plan for placement of the implants and determine bone quality. At Park Avenue Radiologists, we perform CT Dental Scans on our state-of-the-art CT scanner. The procedure is simple, takes only a few minutes, has minimal radiation exposure, and requires no preparation by the patient. CT Images of the mandible (lower jaw) or maxilla (upper jaw) are taken. The data derived from the scan is then reformatted using specialized software. Measurements of each tooth and an analysis of surrounding tissue and bone quality are provided. These images and measurements assist dentists and oral surgeons when planning dental implant placement prior to surgery.

Preventive CT Scans

Preventive CT scans include CT coronary angiogram, CT cardiac calcium scoring, CT virtual colonoscopy, and CT lung cancer screening. Preventive CT scans can help you maintain a healthy lifestyle by continually monitoring key facets of your health. While preventive CT scans are designed to ensure your well-being, if the signs or symptoms of an illness are present, further diagnostic testing may be suggested. A CAT scan provides a detailed analysis of most parts of the body, allowing our radiologists to assess even the slightest of irregularities or anomalies.

Abdomen & Pelvic CT Scans

Computer tomography of the abdomen and pelvis is a diagnostic imaging test used to help detect diseases of the bowels, stomach, colon, prostate, bladder, liver, appendix, and pancreas. An abdomen and pelvic CAT scan is a quick, noninvasive exam. A contrast injection is often given for abdomen and pelvic CT scans. This contrast is administered orally, and it travels through your gastrointestinal tract. Your intestines will then appear white on the CT scan, allowing our radiologists to better see the state of your gastrointestinal tract.

CT Arthrogram

A CT arthrogram is an imaging study that can help detect subtle irregularities of the joints and extremities. Contrast is used during a CT arthrogram and is injected into the joint that is being assessed. This contrast fluid brightens your joints on the CT image, allowing our radiologists to understand your particular anatomy and case better. In the second phase of your CT arthrogram, images of your joints are captured through magnetic resonance imaging. A CT arthrogram may be suggested to locate cysts, screen for damage from dislocations, or to diagnose conditions pertaining to the soft tissues of the joint.

CT Sinus Scans

A CT scan of the sinuses is a diagnostic tool that is used to evaluate your paranasal sinus cavities. A sinus CAT scan may be recommended to detect any sign of inflammatory diseases and sinusitis or to evaluate thickened sinus membranes and fluid-filled sinus cavities. A sinus CT scan can help plan for surgery by defining your individual anatomy and evaluating any existing tumors or abnormalities.

How long does a CT scan take, and when will I get my CT scan results?

Most CAT scans are performed in ten to twenty minutes and do not require sedation. The length of your CAT scan may vary depending on what you are having evaluated. If you are unable to lie still, additional scans may need to be taken to obtain clear results. Our team of highly skilled radiologists will begin to evaluate your CAT scan results as soon as possible. When your results are available, we will send a report to your physician. Your doctor will then contact you to discuss your results. In some cases, additional medical imaging may be required.

How can I learn more about CT scans?

Our radiologists at Park Avenue Radiologists would be happy to discuss CT scans with you. For an appointment or additional information, please call 212.888.1000, email scheduling@parkavenueradiologists.com, or request an appointment online.

Park Avenue Radiology