Pan-India sales & serviceSales +91 98211 84441Showrooms in 6 cities
Dental Imaging

The Clinical Guide to Portable X-Rays: Eliminating Motion Blur and Scatter Radiation.

Dr.Vijay

4 min read

The Clinical Guide to Portable X-Rays: Eliminating Motion Blur and Scatter Radiation.
On this page
  1. The Wall Mounted X-Ray: A Changing Paradigm
  2. Capturing the Margins: Focal Spot Size Revealed
  3. Operator Safety: What to do About Scatter Radiation?
  4. Motion Artifact and Operator Fatigue Explained

The Wall Mounted X-Ray: A Changing Paradigm

Wall mounted X-rays have long been the pillar of any successful dental practice. However, as practices grow from single chair to multiple, the need to keep a patient tethered to one room becomes unwieldy. The move towards handheld/detachable units has its own share of issues.Many early and budget friendly units suffer from imbalanced weight, poor power delivery and shielding, leading to operator fatigue, a high rate of motion blur retakes, and concerns about scatter radiation.Today, to upgrade a practice’s imaging chain is to embrace high frequency DC technology: a technology that prioritizes the operator’s time and safety, while capturing a diagnostic image right on click. This is why the elite practices across the world are standardizing their operating procedures around the Runyes Ray 98P Portable X-Ray.

Capturing the Margins: Focal Spot Size Revealed

Nothing is more frustrating for a busy practitioner than to mount the imaging sensor, capture an RVG, and discover that the margins are hazy, or the lamina dura indistinct. In many cases, operators will blame their sensor; however, the true reason often lies in the unit’s focal spot size.In radiographic physics, larger focal spot = larger “penumbra” or blurriness around the image. To capture a high fidelity diagnostic image, one must prioritize a machine with a minimal spot size. The Runyes Ray 98P takes advantage of a focused 0.4mm spot (Thanks to its premium Canon tube), reducing the penumbra and guaranteeing a high quality image on every patient on your first try. Whether it’s an endodontic file length check or periodontal examination, you’ll see clearly on your first click.

Operator Safety: What to do About Scatter Radiation?

The number one concern professionals have when buying x-ray equipment, is operator exposure. Hand held units present a unique challenge compared to their wall mounted counterparts, since you are inches away from the scatter source.When you take an image with a handheld unit, you expose yourself to radiation bouncing back at you from the patient’s tissues. To combat this dangerous exposure, the best portable x-ray units on the market will have reinforced internal shielding to block scatter radiation from exiting the machine, as well as a rear external shield to block direct exposure.Runyes Ray 98P addresses operator safety by implementing a dual lead internal shielding design, blocking internal scatter radiation and limiting operator exposure, staying well within the permissible international limits of exposure during everyday use.

Motion Artifact and Operator Fatigue Explained

One of the main reasons for motion artifact or image blurriness is operator fatigue. If the unit is too heavy and unwieldy, then hand tremors from a fatigued hand can cause motion artifact on the image, causing a retake and extra exposure for the patient. This happens more frequently than most operators care to admit This is precisely what the Runyes Ray 98P excels at eliminating through its aggressive weight reduction, for a balanced and ergonomic feel. With a weight of only 1.7kg , the Ray guarantees a neutral grip with one hand, eliminating motion artifact from hand tremors and allowing you to work confidently on even the most inaccessible areas of the mouth.

AC Current vs DC Current: Why it Matters

Traditional AC (Alternating Current) X-ray units have long been the standard for cost effective imaging.However, this comes at the price of greater patient exposure. Alternating current produces a pulsed wave of radiation, which loses energy during the pulse, meaning there is a higher percentage of “wasted” radiation that fails to penetrate the patient’s body and is absorbed instead Modern operators have switched to DC (Direct Current) high frequency technology, a superior power supply that utilizes a constant current to achieve greater penetration with less patient exposure. The Runyes Ray 98P provides a consistent 70kV high frequency DC output, guaranteeing minimal patient exposure on every shot, without compromising your ability to capture a diagnostic image. Combined with a high capacity lithium battery, the Ray can provide hundreds of shots on a single charge, without interrupting your day to recharge the unit. This makes the Ray compatible with all modern RVG sensors and phosphor plate systems, without disrupting your busy workflow.

Securing Your Diagnostic Toolkit

The move toward a high end portable X-ray is a huge step towards eliminating workflow roadblocks, reducing patient exposure for better soft tissue imaging, and general diagnostic confidence. With a working knowledge of the underlying clinical physics of focal spot size, DC current and lead shielding, you are now in a position to make the best choice for your practice. You owe it to your practice to step up your diagnostic imaging game and reduce the risk from faulty equipment. With the aid of a portable x-ray such as the Runyes Ray 98P , you can deliver safe, effective, and diagnostic care to your patients. As the official equipment partner of Runyes, Unicorn DenMart Ltd. is able to provide genuine technology solutions to your practice, for a seamless upgrade path to high quality, safe, and precision dental care.

Disclaimer

This article is for general information. Product specifications and features change with the manufacturer — confirm details with our team before you buy. Full disclaimer

The trust we’ve earned

Dentists across India on working with Unicorn DenMart.

After years of use, Shining 3D Aoralscan 3 stands out as a dependable intraoral scanner that helps clinics move from conventional impressions to a faster, cleaner and more confident digital workflow.
Dr. Divij KhullarMDS Prosthodontics, FFPA (USA), World Record Holder, BPS Specialist – Ivoclar Switzerland
Unicorn DenMart Ltd
4.9
Based on 6,050 reviews
powered by Google
review us on
Read more reviews

Frequently Asked Questions (FAQs)

When handheld, motion-blur is always operator issue and not patient related. Unlike a wall mounted unit clamped in a sturdy scissor arm, the portable unit requires your grip. As your battery dies throughout the busy day, the unit will draw upon reduced kV. To compensate to this drop, you’ll be cranking the time dial for a longer exposure. This extra fraction of a second, is where your micro-hand trembles turn into a macro-blur.

First treat your portable x-ray like a phone battery – do not let it fall below 30% charge. A full battery allows peak power output, shortening exposure time (to as low as 0.08 seconds for anterior teeth) . Secondly, buy the unit with an excellent 0.4mm fine focal spot, which inherently produces sharper edges which forgives minor hand movements. Finally, brace yourself to take the shot. Tuck your elbows into your ribs and rest both hands on the unit forming a human tripod.

This is the concern of many dentists using handheld units. The radiation ‘backscatter’ from your patient’s skull is indeed going into your hands. But legitimate portable units will have a lead-infused acrylic backscatter shield over the cone. When held vertically, this shield creates a conical ‘safety region’ or radiation shadow which protects your hands, torso and thyroid.

No, and this is the trickiest aspect of safety in the operatory. The protective ‘safety region’ only exists when the backscatter shield is held parallel to your body. The user has to maintain this parallel tracking throughout the exposure. Tilting the machine at 45 degrees to peer into a maxillary molar means your body is no longer inside this radiation shadow. The secret to handheld x-ray is to rotate the patient’s head to meet the machine at a horizontal plane.