Guide for Slip Ring Technology CT

by | Jul 30, 2021

In 1970, a versatile medical diagnosis technique has been introduced with X-ray computed tomography scanning (aka CT scan).

For the development of CT scan technology, the credit goes to the hard work done by the British electrical engineer “Godfrey N. Hounsfield” and South-African American physicist “Allan M. Cormack”. For these crucial works, both were awarded the Nobel Prize in 1979.

In 1972, Godfrey Hounsfield invented the first commercially viable CT scanner. This was the first step. Later on, with the new generation, a lot of inventions happened in CT scan technology. Slip ring technology is one of them.

In this article, we are going to study slip rig technology used in helical CT scanning.

What is Slip Ring Technology in CT?


The CT scan is one of the best medical diagnostic tools that are widely used for diagnosing diseases and evaluating injuries.

Mostly, in medical and pharmaceutical nomenclature, CT scan is referred as “Computed Tomography Scanning” or “X-ray Computed Tomography” or “Computerized Axial tomography Scan (CAT scan)” or “Computer-Aided Tomography”.

Looking at the working principle, CT scan operates by using an x-ray tube and an x-ray detector array with the help of slip ring technology.

The slip ring is placed at the diameter of the gantry of the CT scan machine. It consists of wire brushes and several conductive rings which can carry the electrical source to scanner operation.

It is considered as the heart of the CT scan that improves the quality of the images and diagnostic functionality. 

Thus, the slip ring comes with more advantages and provides the ability to improve the rotational diagnostic capability and affordability of medical CT image scanning techniques.

through bore slip ring

Advantages of Slip Ring Technology in CT

There are several advantages of slip ring technology in CT compared to two-dimensional medical radiography (i.e. X-ray).

  • The basic advantage of slip ring is that it allows transferring electrical signal or power for continuous gantry rotation of CT scan machine.
  • Slip rings help to perform joint motion with canon 320 slices and allow high-speed transmission data.
  • It can be easily installed and handles the rotational pressure in a CT scan.
  • Slip ring of CT operates with low audible noise and error-free transmission of the data.
  • It is available in a compact size so that user can easily transport.
  • When it comes to the three-dimensional and four-dimensional studies in CT, the slip ring plays a vital role.

What is Helical Scanning?

Helical scanning is one of the best diagnostic procedures of CT scans that are done without the use of radiopaque contrast equipment.

It performs continuous rotation over the object and captures slid through the X-ray ring, quickly and smoothly.

In other scientific words, Helical CT is known as “Spiral CT” because it consists of spinning tubes.

Helical computed tomography (Helical CT) captures the images in the three-dimensional (3D) structure using a helical or spiral track relative to the object (or patient).

This helical CT works as “multi-slice” or “multi-detector” CT which travels along a helical path.

Helical scanning is very beneficial and fruitful for capturing multiple cross-sections simultaneously compared to the single detector (as used in old CT techniques).

For all these operations, the Helical CT scanner uses slip ring technology.

What is the Purpose of Slip Rings in Helical CT Scanners?

The helical CT scanner requires several types of equipment for smooth operations. The slip ring is one of the most crucial electromechanical devices.

In the helical CT scanner, the main purpose of the slip ring is that-

  • Slip ring is used to transmit the electricity and electrical signal across the moving interface of the gantry of the helical CT scanner.
  • It improves better rotational (360° degree) capability for diagnostic and affordability for three-dimensional (3D) image scanning techniques.
  • It also allows faster scan times and minimal infers and delays.
  • Slip ring produces multiple slices along with the helical (or spiral) track in a very short duration (within few minutes).

Helical CT Advantages and Disadvantages

In the modern medical era, helical CT scan is superior to traditional CT scan techniques.

Helical CT has several advantages (like accuracy, speed, efficiency, 3D structure, automated algorithm, and many more functions). Despite that, there are also some disadvantages of helical CT scanning.

Let’s study the pros and cons of helical CT.

Advantages (or pros) of helical CT:

  • Helical CT scan produces high-resolution multi-planar and three-dimensional (3D) images.
  • It helps the doctor or scientist for identifying and visualizing the internal structure of the human body (likes bones, tissues, vessels, and other solid organs.
  • This type of CT scan gains more information from even a non-contrast-enhanced study which is more than a regular X-ray.
  • It provides better spatial and contrast resolutions which represent output in enhanced anatomical characterization.

Advantages (or pros) of helical CT:

  • Sometimes, helical CT is not reliable to find out tumors in the interior part of the body if the tumors are very small (approximately less than a cm) in size.
  • The disadvantage of helical CT is that it exposes human beings to radiation.
  • It finds in large in size with high inertia. Due to this condition, a helical CT scan has a speed limit to spin.


In this guide, we have learned about slip ring technology in CT scan with basic concepts, history and advantages. We also studied slip ring technology in helical CT scanning along with the purpose, pros and cons over traditional CT techniques. Looking at the facts, slip ring technology is helping in enhancing the development of the CT scan technology.

I hope you are able to grasp the point mentioned in this guide. If you have any questions, feel free to ask me in the comment section