Low-Dose CT

Outstanding Low-Dose CT Imaging

Recent world events and studies in the medical literature have increased awareness to radiation doses linked to medical imaging, and with CT imaging in particular. At Diagnostic Imaging of Salem, we take reducing radiation exposure seriously, and our dose-reducing CT technologies reflect that commitment, reducing radiation doses by as much as 50%.  These technologies include:

● MegaCoolTM Tube - Designed for high stability, this x-ray tube reduces beam variability allowing for fast imaging and decreased radiation dose.  The tube also captures stray electrons to prevent them from producing additional, unneeded x-rays.
● Quantum detectors - superior praesodynium-doped gadolinium oxy-sulfide crystal-based manufacture allows for faster scanning and ensures maximal signal in low-dose studies.
● SUREExposure3D - No body is shaped quite the same, and more radiation is needed to penetrate thicker parts of the body.  This software automatically adjusts current to ensure the appropriate level of radiation is used, based on changes in size and density.  When compared to imaging without this technology, SUREExposure3D alone can reduce radiation dose by up to 40%.
●  Boost3D - This locally adaptive software works to improve imaging in regions of high-density structures, reducing the need to increase radiation dose to improve image quality in these areas.
● Quantum Denoising Software - This adaptive noise reduction filter dramatically reduces image noise, allowing for reduction in patient radiation doses of up to 50% together with Boost3D.

Insist on low-dose CT imaging when you need a CT scan, like that provided at Diagnostic Imaging of Salem.

Some practices would have you believe they are the only facility in the area able to offer patients low-dose imaging; we feel this is an inaccurate claim that oversimplifies the nature of radiation and CT imaging (Please see our Radiation FAQs for more information). We will continue to provide you the information you need to make an informed decision. Whether it is called low-dose, ultra-low-dose, or super-ultra-low-dose CT imaging, all current generation technology uses dose-reduction technology, and most differences can be accounted for by brand name; one needs to take a look at the user's knowledge of the technology and radiation, and how effectively they can use that to provide diagnostic imaging while minimizing dose.


As with any technology, it is the user who determines whether or not technology is used effectively.  Our staff and radiologists take additional steps to reduce radiation exposure:

● Participation in the Image Gently and Image Wisely campaigns, national efforts to reduce radiation exposure from medical imaging
● Continued ongoing medical education in the field of radiation safety
● Participation in the National ACR (American College of Radiology) Radiation Dose Registry
● Adherence to ACR (American College of Radiology) guidelines on CT Dose

For more information on radiation, please look at our Radiation FAQs.

 What is CT?

A CT (Computed Tomography) scanner uses x-rays to make detailed pictures of structures inside of the body.  Unlike conventional x-ray exams, CT provides a different form of imaging known as cross-sectional imaging.  The X-ray generator and detectors rotate around the patient's body which allows the computer to use the data received to generate cross-sectional images (slices) of the structures inside the patient's body.  A single rotation takes about 1 second. The x-ray source produces a narrow, fan-shaped, beam of x-rays used to image a section of the patient's body. The thickness of the fan beam may be as small as 1 millimeter or as large as 10 millimeters. In typical examinations there are several phases; each made up of 10 to 50 rotations of the x-ray tube around the patient, in coordination with the table moving through the circular opening.  Your doctor may request that you receive an injection of a "contrast material" during the exam to facilitate visualization of vascular structure.  You may also be asked to drink an oral contrast that will allow enhanced images of your digestive system.  As the x-rays exit the patient's body, opposite the generator, a set of detectors sense the amount of x-rays that have passed through a particular section.  This data is used to generate the image that is displayed on the computer.

About Our Machine 


Our new Toshiba Aquilion™ CT scanner expands our capabilities and allows us to provide you with superior diagnostic images. This multi-slice CT scanner produces high-resolution images of any part of the body in just seconds, while minimizing exposure to radiation.

Spatial Resolution

We offer .5mm detector rows; whereas most technology of this kind offers .625mm detector rows. This allows for us to have unsurpassed spatial resolution for visualization of fine details.

Large Aperature with Robust Table Design

Our 72 cm (approximately 28.5 inches) gantry aperature, 450 pounds weight capacity, and 40% wider table design (approximately 19 inches) allows for the most open and comfortabe conventional CT scan, without compromising image quality. Our equipment has the largest opening and widest table design in the industry.