The described tube arcing artifact seen in CT images was caused by a fault with the transformer supplying voltage to the rotor connected to the anode in the X‐ray tube, which involved sudden …

Nov 3, 2025 · Tube arcing occurs when there is a short-circuit within the tube, typically from the cathode to the tube envelope. The result is a temporary loss of x-ray output and a localized artifact.

There are two types of x-ray tube arcing. The first type is caused by the accumulation of tungsten gas buildup over the years. The tungsten gas attracts the high voltage electron beam as it travels toward …

Mar 9, 2016 · A ring artifact detected on trans-axial CT image of positron emission tomography/computed tomography (PET/CT), was caused by contamination of CT tube aperture by …

This problem was initially corrected by reducing the tube voltage to 120 kV from the original 140 kV and, subsequently, replacing the faulty transformer. This kind of artifact, which is a very rare situation, can …

Aug 26, 2022 · But how? Most importantly, arcing must be evaluated to determine if it’s causing a loss of X-ray output and whether the arcing is responsible for localized artifacts appearing on images.

Because a CT scanner is a high voltage machine, some arcing is normal. It's such a common occurrence that many CT scanners are designed with the application of a correction algorithm that …

Apr 23, 2025 · CT artifacts are common and can occur for various reasons. Knowledge of these artifacts is important because they can mimic pathology (e.g. partial volume artifact) or can degrade image …

This coronal reformat of a CT of the chest shows the havoc that can be wrought by tube arcing. There is a band of markedly increased noise over approximately 1cm of craniocaudal distance on this CTPA …

Feb 8, 2024 · A: Arcing can cause imaging artifacts, which make diagnosis more difficult. In addition, because they can cause termination of scans, they interrupt workflow and may result in the need to...